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</pre><pre class="rust ">
<span class="comment">// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT</span>
<span class="comment">// file at the top-level directory of this distribution and at</span>
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="comment">// Rust JSON serialization library</span>
<span class="comment">// Copyright (c) 2011 Google Inc.</span>
<span class="doccomment">//! JSON parsing and serialization</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # What is JSON?</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! JSON (JavaScript Object Notation) is a way to write data in Javascript.</span>
<span class="doccomment">//! Like XML, it allows encoding structured data in a text format that can be</span>
<span class="doccomment">//! easily read by humans. Its simple syntax and native compatibility with</span>
<span class="doccomment">//! JavaScript have made it a widely used format.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Data types that can be encoded are JavaScript types (see the `Json` enum</span>
<span class="doccomment">//! for more details):</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! * `I64`: equivalent to rust's `i64`</span>
<span class="doccomment">//! * `U64`: equivalent to rust's `u64`</span>
<span class="doccomment">//! * `F64`: equivalent to rust's `f64`</span>
<span class="doccomment">//! * `Boolean`: equivalent to rust's `bool`</span>
<span class="doccomment">//! * `String`: equivalent to rust's `String`</span>
<span class="doccomment">//! * `Array`: equivalent to rust's `Vec<T>`, but also allowing objects of</span>
<span class="doccomment">//! different types in the</span>
<span class="doccomment">//! same array</span>
<span class="doccomment">//! * `Object`: equivalent to rust's `BTreeMap<String, json::Json>`</span>
<span class="doccomment">//! * `Null`</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! An object is a series of string keys mapping to values, in `"key": value`</span>
<span class="doccomment">//! format. Arrays are enclosed in square brackets ([ ... ]) and objects in</span>
<span class="doccomment">//! curly brackets ({ ... }). A simple JSON document encoding a person,</span>
<span class="doccomment">//! their age, address and phone numbers could look like</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```ignore</span>
<span class="doccomment">//! {</span>
<span class="doccomment">//! "FirstName": "John",</span>
<span class="doccomment">//! "LastName": "Doe",</span>
<span class="doccomment">//! "Age": 43,</span>
<span class="doccomment">//! "Address": {</span>
<span class="doccomment">//! "Street": "Downing Street 10",</span>
<span class="doccomment">//! "City": "London",</span>
<span class="doccomment">//! "Country": "Great Britain"</span>
<span class="doccomment">//! },</span>
<span class="doccomment">//! "PhoneNumbers": [</span>
<span class="doccomment">//! "+44 1234567",</span>
<span class="doccomment">//! "+44 2345678"</span>
<span class="doccomment">//! ]</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # Rust Type-based Encoding and Decoding</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Rust provides a mechanism for low boilerplate encoding & decoding of values</span>
<span class="doccomment">//! to and from JSON via the serialization API. To be able to encode a piece</span>
<span class="doccomment">//! of data, it must implement the `rustc_serialize::Encodable` trait. To be</span>
<span class="doccomment">//! able to decode a piece of data, it must implement the</span>
<span class="doccomment">//! `rustc_serialize::Decodable` trait. The Rust compiler provides an</span>
<span class="doccomment">//! annotation to automatically generate the code for these traits:</span>
<span class="doccomment">//! `#[derive(RustcDecodable, RustcEncodable)]`</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The JSON API provides an enum `json::Json` and a trait `ToJson` to encode</span>
<span class="doccomment">//! objects. The `ToJson` trait provides a `to_json` method to convert an</span>
<span class="doccomment">//! object into a `json::Json` value. A `json::Json` value can be encoded as a</span>
<span class="doccomment">//! string or buffer using the functions described above. You can also use the</span>
<span class="doccomment">//! `json::Encoder` object, which implements the `Encoder` trait.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! When using `ToJson`, the `Encodable` trait implementation is not</span>
<span class="doccomment">//! mandatory.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # Examples of use</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ## Using Autoserialization</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Create a struct called `TestStruct` and serialize and deserialize it to and</span>
<span class="doccomment">//! from JSON using the serialization API, using the derived serialization code.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```rust</span>
<span class="doccomment">//! extern crate rustc_serialize;</span>
<span class="doccomment">//! use rustc_serialize::json;</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Automatically generate `RustcDecodable` and `RustcEncodable` trait</span>
<span class="doccomment">//! // implementations</span>
<span class="doccomment">//! #[derive(RustcDecodable, RustcEncodable)]</span>
<span class="doccomment">//! pub struct TestStruct {</span>
<span class="doccomment">//! data_int: u8,</span>
<span class="doccomment">//! data_str: String,</span>
<span class="doccomment">//! data_vector: Vec<u8>,</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! fn main() {</span>
<span class="doccomment">//! let object = TestStruct {</span>
<span class="doccomment">//! data_int: 1,</span>
<span class="doccomment">//! data_str: "homura".to_string(),</span>
<span class="doccomment">//! data_vector: vec![2,3,4,5],</span>
<span class="doccomment">//! };</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Serialize using `json::encode`</span>
<span class="doccomment">//! let encoded = json::encode(&object).unwrap();</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Deserialize using `json::decode`</span>
<span class="doccomment">//! let decoded: TestStruct = json::decode(&encoded).unwrap();</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ## Using the `ToJson` trait</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The examples below use the `ToJson` trait to generate the JSON string,</span>
<span class="doccomment">//! which is required for custom mappings.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ### Simple example of `ToJson` usage</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```rust</span>
<span class="doccomment">//! extern crate rustc_serialize;</span>
<span class="doccomment">//! use rustc_serialize::json::{self, ToJson, Json};</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // A custom data structure</span>
<span class="doccomment">//! struct ComplexNum {</span>
<span class="doccomment">//! a: f64,</span>
<span class="doccomment">//! b: f64,</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // JSON value representation</span>
<span class="doccomment">//! impl ToJson for ComplexNum {</span>
<span class="doccomment">//! fn to_json(&self) -> Json {</span>
<span class="doccomment">//! Json::String(format!("{}+{}i", self.a, self.b))</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Only generate `RustcEncodable` trait implementation</span>
<span class="doccomment">//! #[derive(RustcEncodable)]</span>
<span class="doccomment">//! pub struct ComplexNumRecord {</span>
<span class="doccomment">//! uid: u8,</span>
<span class="doccomment">//! dsc: String,</span>
<span class="doccomment">//! val: Json,</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! fn main() {</span>
<span class="doccomment">//! let num = ComplexNum { a: 0.0001, b: 12.539 };</span>
<span class="doccomment">//! let data: String = json::encode(&ComplexNumRecord{</span>
<span class="doccomment">//! uid: 1,</span>
<span class="doccomment">//! dsc: "test".to_string(),</span>
<span class="doccomment">//! val: num.to_json(),</span>
<span class="doccomment">//! }).unwrap();</span>
<span class="doccomment">//! println!("data: {}", data);</span>
<span class="doccomment">//! // data: {"uid":1,"dsc":"test","val":"0.0001+12.539i"};</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ### Verbose example of `ToJson` usage</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```rust</span>
<span class="doccomment">//! extern crate rustc_serialize;</span>
<span class="doccomment">//! use std::collections::BTreeMap;</span>
<span class="doccomment">//! use rustc_serialize::json::{self, Json, ToJson};</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Only generate `Decodable` trait implementation</span>
<span class="doccomment">//! #[derive(RustcDecodable)]</span>
<span class="doccomment">//! pub struct TestStruct {</span>
<span class="doccomment">//! data_int: u8,</span>
<span class="doccomment">//! data_str: String,</span>
<span class="doccomment">//! data_vector: Vec<u8>,</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Specify encoding method manually</span>
<span class="doccomment">//! impl ToJson for TestStruct {</span>
<span class="doccomment">//! fn to_json(&self) -> Json {</span>
<span class="doccomment">//! let mut d = BTreeMap::new();</span>
<span class="doccomment">//! // All standard types implement `to_json()`, so use it</span>
<span class="doccomment">//! d.insert("data_int".to_string(), self.data_int.to_json());</span>
<span class="doccomment">//! d.insert("data_str".to_string(), self.data_str.to_json());</span>
<span class="doccomment">//! d.insert("data_vector".to_string(), self.data_vector.to_json());</span>
<span class="doccomment">//! Json::Object(d)</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! fn main() {</span>
<span class="doccomment">//! // Serialize using `ToJson`</span>
<span class="doccomment">//! let input_data = TestStruct {</span>
<span class="doccomment">//! data_int: 1,</span>
<span class="doccomment">//! data_str: "madoka".to_string(),</span>
<span class="doccomment">//! data_vector: vec![2,3,4,5],</span>
<span class="doccomment">//! };</span>
<span class="doccomment">//! let json_obj: Json = input_data.to_json();</span>
<span class="doccomment">//! let json_str: String = json_obj.to_string();</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! // Deserialize like before</span>
<span class="doccomment">//! let decoded: TestStruct = json::decode(&json_str).unwrap();</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ## Parsing a `str` to `Json` and reading the result</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ```rust</span>
<span class="doccomment">//! extern crate rustc_serialize;</span>
<span class="doccomment">//! use rustc_serialize::json::Json;</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! fn main() {</span>
<span class="doccomment">//! let data = Json::from_str("{\"foo\": 13, \"bar\": \"baz\"}").unwrap();</span>
<span class="doccomment">//! println!("data: {}", data);</span>
<span class="doccomment">//! // data: {"bar":"baz","foo":13}</span>
<span class="doccomment">//! println!("object? {}", data.is_object());</span>
<span class="doccomment">//! // object? true</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! let obj = data.as_object().unwrap();</span>
<span class="doccomment">//! let foo = obj.get("foo").unwrap();</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! println!("array? {:?}", foo.as_array());</span>
<span class="doccomment">//! // array? None</span>
<span class="doccomment">//! println!("u64? {:?}", foo.as_u64());</span>
<span class="doccomment">//! // u64? Some(13u64)</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! for (key, value) in obj.iter() {</span>
<span class="doccomment">//! println!("{}: {}", key, match *value {</span>
<span class="doccomment">//! Json::U64(v) => format!("{} (u64)", v),</span>
<span class="doccomment">//! Json::String(ref v) => format!("{} (string)", v),</span>
<span class="doccomment">//! _ => format!("other")</span>
<span class="doccomment">//! });</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! // bar: baz (string)</span>
<span class="doccomment">//! // foo: 13 (u64)</span>
<span class="doccomment">//! }</span>
<span class="doccomment">//! ```</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! # The status of this library</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! While this library is the standard way of working with JSON in Rust,</span>
<span class="doccomment">//! there is a next-generation library called Serde that's in the works (it's</span>
<span class="doccomment">//! faster, overcomes some design limitations of rustc-serialize and has more</span>
<span class="doccomment">//! features). You might consider using it when starting a new project or</span>
<span class="doccomment">//! evaluating Rust JSON performance.</span>
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">JsonEvent</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">ErrorCode</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">ParserError</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">DecoderError</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">ParserState</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">InternalStackElement</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::{<span class="ident">HashMap</span>, <span class="ident">BTreeMap</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>::<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">StdError</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">i64</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">swap</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>::<span class="ident">Index</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">str</span>::<span class="ident">FromStr</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">string</span>;
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">char</span>, <span class="ident">f64</span>, <span class="ident">fmt</span>, <span class="ident">io</span>, <span class="ident">str</span>};
<span class="kw">use</span> <span class="ident">Encodable</span>;
<span class="doccomment">/// Represents a json value</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Json</span> {
<span class="ident">I64</span>(<span class="ident">i64</span>),
<span class="ident">U64</span>(<span class="ident">u64</span>),
<span class="ident">F64</span>(<span class="ident">f64</span>),
<span class="ident">String</span>(<span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">Boolean</span>(<span class="ident">bool</span>),
<span class="ident">Array</span>(<span class="self">self</span>::<span class="ident">Array</span>),
<span class="ident">Object</span>(<span class="self">self</span>::<span class="ident">Object</span>),
<span class="ident">Null</span>,
}
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Array</span> <span class="op">=</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Json</span><span class="op">></span>;
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Object</span> <span class="op">=</span> <span class="ident">BTreeMap</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">Json</span><span class="op">></span>;
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PrettyJson</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Json</span> }
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AsJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span> }
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AsPrettyJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span>, <span class="ident">indent</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> }
<span class="doccomment">/// The errors that can arise while parsing a JSON stream.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ErrorCode</span> {
<span class="ident">InvalidSyntax</span>,
<span class="ident">InvalidNumber</span>,
<span class="ident">EOFWhileParsingObject</span>,
<span class="ident">EOFWhileParsingArray</span>,
<span class="ident">EOFWhileParsingValue</span>,
<span class="ident">EOFWhileParsingString</span>,
<span class="ident">KeyMustBeAString</span>,
<span class="ident">ExpectedColon</span>,
<span class="ident">TrailingCharacters</span>,
<span class="ident">TrailingComma</span>,
<span class="ident">InvalidEscape</span>,
<span class="ident">InvalidUnicodeCodePoint</span>,
<span class="ident">LoneLeadingSurrogateInHexEscape</span>,
<span class="ident">UnexpectedEndOfHexEscape</span>,
<span class="ident">UnrecognizedHex</span>,
<span class="ident">NotFourDigit</span>,
<span class="ident">ControlCharacterInString</span>,
<span class="ident">NotUtf8</span>,
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ParserError</span> {
<span class="doccomment">/// msg, line, col</span>
<span class="ident">SyntaxError</span>(<span class="ident">ErrorCode</span>, <span class="ident">usize</span>, <span class="ident">usize</span>),
<span class="ident">IoError</span>(<span class="ident">io</span>::<span class="ident">Error</span>),
}
<span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">ParserError</span> {
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">ParserError</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) {
(<span class="kw-2">&</span><span class="ident">SyntaxError</span>(<span class="ident">msg0</span>, <span class="ident">line0</span>, <span class="ident">col0</span>), <span class="kw-2">&</span><span class="ident">SyntaxError</span>(<span class="ident">msg1</span>, <span class="ident">line1</span>, <span class="ident">col1</span>)) <span class="op">=></span>
<span class="ident">msg0</span> <span class="op">==</span> <span class="ident">msg1</span> <span class="op">&&</span> <span class="ident">line0</span> <span class="op">==</span> <span class="ident">line1</span> <span class="op">&&</span> <span class="ident">col0</span> <span class="op">==</span> <span class="ident">col1</span>,
(<span class="kw-2">&</span><span class="ident">IoError</span>(_), _) <span class="op">=></span> <span class="bool-val">false</span>,
(_, <span class="kw-2">&</span><span class="ident">IoError</span>(_)) <span class="op">=></span> <span class="bool-val">false</span>,
}
}
}
<span class="comment">// Builder and Parser have the same errors.</span>
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">BuilderError</span> <span class="op">=</span> <span class="ident">ParserError</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">DecoderError</span> {
<span class="ident">ParseError</span>(<span class="ident">ParserError</span>),
<span class="ident">ExpectedError</span>(<span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">MissingFieldError</span>(<span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">UnknownVariantError</span>(<span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">ApplicationError</span>(<span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">EOF</span>,
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">EncoderError</span> {
<span class="ident">FmtError</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>),
<span class="ident">BadHashmapKey</span>,
}
<span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">EncoderError</span> {
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">EncoderError</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> (<span class="kw-2">*</span><span class="self">self</span>, <span class="kw-2">*</span><span class="ident">other</span>) {
(<span class="ident">EncoderError</span>::<span class="ident">FmtError</span>(_), <span class="ident">EncoderError</span>::<span class="ident">FmtError</span>(_)) <span class="op">=></span> <span class="bool-val">true</span>,
(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>, <span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
}
<span class="kw">impl</span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">EncoderError</span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span> { <span class="kw-2">*</span><span class="self">self</span> }
}
<span class="doccomment">/// Returns a readable error string for a given error code.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">error_str</span>(<span class="ident">error</span>: <span class="ident">ErrorCode</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
<span class="kw">match</span> <span class="ident">error</span> {
<span class="ident">InvalidSyntax</span> <span class="op">=></span> <span class="string">"invalid syntax"</span>,
<span class="ident">InvalidNumber</span> <span class="op">=></span> <span class="string">"invalid number"</span>,
<span class="ident">EOFWhileParsingObject</span> <span class="op">=></span> <span class="string">"EOF While parsing object"</span>,
<span class="ident">EOFWhileParsingArray</span> <span class="op">=></span> <span class="string">"EOF While parsing array"</span>,
<span class="ident">EOFWhileParsingValue</span> <span class="op">=></span> <span class="string">"EOF While parsing value"</span>,
<span class="ident">EOFWhileParsingString</span> <span class="op">=></span> <span class="string">"EOF While parsing string"</span>,
<span class="ident">KeyMustBeAString</span> <span class="op">=></span> <span class="string">"key must be a string"</span>,
<span class="ident">ExpectedColon</span> <span class="op">=></span> <span class="string">"expected `:`"</span>,
<span class="ident">TrailingCharacters</span> <span class="op">=></span> <span class="string">"trailing characters"</span>,
<span class="ident">TrailingComma</span> <span class="op">=></span> <span class="string">"trailing comma"</span>,
<span class="ident">InvalidEscape</span> <span class="op">=></span> <span class="string">"invalid escape"</span>,
<span class="ident">UnrecognizedHex</span> <span class="op">=></span> <span class="string">"invalid \\u{ esc}ape (unrecognized hex)"</span>,
<span class="ident">NotFourDigit</span> <span class="op">=></span> <span class="string">"invalid \\u{ esc}ape (not four digits)"</span>,
<span class="ident">ControlCharacterInString</span> <span class="op">=></span> <span class="string">"unescaped control character in string"</span>,
<span class="ident">NotUtf8</span> <span class="op">=></span> <span class="string">"contents not utf-8"</span>,
<span class="ident">InvalidUnicodeCodePoint</span> <span class="op">=></span> <span class="string">"invalid Unicode code point"</span>,
<span class="ident">LoneLeadingSurrogateInHexEscape</span> <span class="op">=></span> <span class="string">"lone leading surrogate in hex escape"</span>,
<span class="ident">UnexpectedEndOfHexEscape</span> <span class="op">=></span> <span class="string">"unexpected end of hex escape"</span>,
}
}
<span class="doccomment">/// Shortcut function to decode a JSON `&str` into an object</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">decode</span><span class="op"><</span><span class="ident">T</span>: ::<span class="ident">Decodable</span><span class="op">></span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="ident">s</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">x</span>) <span class="op">=></span> <span class="ident">x</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ParseError</span>(<span class="ident">e</span>))
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">decoder</span> <span class="op">=</span> <span class="ident">Decoder</span>::<span class="ident">new</span>(<span class="ident">json</span>);
::<span class="ident">Decodable</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">decoder</span>)
}
<span class="doccomment">/// Shortcut function to encode a `T` into a JSON `String`</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">encode</span><span class="op"><</span><span class="ident">T</span>: ::<span class="ident">Encodable</span><span class="op">></span>(<span class="ident">object</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>();
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">s</span>);
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">object</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>));
}
<span class="prelude-val">Ok</span>(<span class="ident">s</span>)
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">ErrorCode</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">error_str</span>(<span class="kw-2">*</span><span class="self">self</span>).<span class="ident">fmt</span>(<span class="ident">f</span>)
}
}
<span class="kw">impl</span> <span class="ident">StdError</span> <span class="kw">for</span> <span class="ident">DecoderError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> { <span class="string">"decoder error"</span> }
<span class="kw">fn</span> <span class="ident">cause</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">StdError</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">DecoderError</span>::<span class="ident">ParseError</span>(<span class="kw-2">ref</span> <span class="ident">e</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">e</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>,
}
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">DecoderError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>)
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">ParserError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">DecoderError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">ParserError</span>) <span class="op">-></span> <span class="ident">DecoderError</span> {
<span class="ident">ParseError</span>(<span class="ident">From</span>::<span class="ident">from</span>(<span class="ident">err</span>))
}
}
<span class="kw">impl</span> <span class="ident">StdError</span> <span class="kw">for</span> <span class="ident">ParserError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> { <span class="string">"failed to parse json"</span> }
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">ParserError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>)
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">io</span>::<span class="ident">Error</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ParserError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">io</span>::<span class="ident">Error</span>) <span class="op">-></span> <span class="ident">ParserError</span> {
<span class="ident">IoError</span>(<span class="ident">err</span>)
}
}
<span class="kw">impl</span> <span class="ident">StdError</span> <span class="kw">for</span> <span class="ident">EncoderError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> { <span class="string">"encoder error"</span> }
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">EncoderError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>)
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fmt</span>::<span class="ident">Error</span><span class="op">></span> <span class="kw">for</span> <span class="ident">EncoderError</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">fmt</span>::<span class="ident">Error</span>) <span class="op">-></span> <span class="ident">EncoderError</span> { <span class="ident">EncoderError</span>::<span class="ident">FmtError</span>(<span class="ident">err</span>) }
}
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">EncodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">EncoderError</span><span class="op">></span>;
<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">DecoderError</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">escape_str</span>(<span class="ident">wr</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Write</span>, <span class="ident">v</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="string">"\""</span>));
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">start</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">byte</span>) <span class="kw">in</span> <span class="ident">v</span>.<span class="ident">bytes</span>().<span class="ident">enumerate</span>() {
<span class="kw">let</span> <span class="ident">escaped</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">byte</span> {
<span class="string">b'"'</span> <span class="op">=></span> <span class="string">"\\\""</span>,
<span class="string">b'\\'</span> <span class="op">=></span> <span class="string">"\\\\"</span>,
<span class="string">b'\x00'</span> <span class="op">=></span> <span class="string">"\\u0000"</span>,
<span class="string">b'\x01'</span> <span class="op">=></span> <span class="string">"\\u0001"</span>,
<span class="string">b'\x02'</span> <span class="op">=></span> <span class="string">"\\u0002"</span>,
<span class="string">b'\x03'</span> <span class="op">=></span> <span class="string">"\\u0003"</span>,
<span class="string">b'\x04'</span> <span class="op">=></span> <span class="string">"\\u0004"</span>,
<span class="string">b'\x05'</span> <span class="op">=></span> <span class="string">"\\u0005"</span>,
<span class="string">b'\x06'</span> <span class="op">=></span> <span class="string">"\\u0006"</span>,
<span class="string">b'\x07'</span> <span class="op">=></span> <span class="string">"\\u0007"</span>,
<span class="string">b'\x08'</span> <span class="op">=></span> <span class="string">"\\b"</span>,
<span class="string">b'\t'</span> <span class="op">=></span> <span class="string">"\\t"</span>,
<span class="string">b'\n'</span> <span class="op">=></span> <span class="string">"\\n"</span>,
<span class="string">b'\x0b'</span> <span class="op">=></span> <span class="string">"\\u000b"</span>,
<span class="string">b'\x0c'</span> <span class="op">=></span> <span class="string">"\\f"</span>,
<span class="string">b'\r'</span> <span class="op">=></span> <span class="string">"\\r"</span>,
<span class="string">b'\x0e'</span> <span class="op">=></span> <span class="string">"\\u000e"</span>,
<span class="string">b'\x0f'</span> <span class="op">=></span> <span class="string">"\\u000f"</span>,
<span class="string">b'\x10'</span> <span class="op">=></span> <span class="string">"\\u0010"</span>,
<span class="string">b'\x11'</span> <span class="op">=></span> <span class="string">"\\u0011"</span>,
<span class="string">b'\x12'</span> <span class="op">=></span> <span class="string">"\\u0012"</span>,
<span class="string">b'\x13'</span> <span class="op">=></span> <span class="string">"\\u0013"</span>,
<span class="string">b'\x14'</span> <span class="op">=></span> <span class="string">"\\u0014"</span>,
<span class="string">b'\x15'</span> <span class="op">=></span> <span class="string">"\\u0015"</span>,
<span class="string">b'\x16'</span> <span class="op">=></span> <span class="string">"\\u0016"</span>,
<span class="string">b'\x17'</span> <span class="op">=></span> <span class="string">"\\u0017"</span>,
<span class="string">b'\x18'</span> <span class="op">=></span> <span class="string">"\\u0018"</span>,
<span class="string">b'\x19'</span> <span class="op">=></span> <span class="string">"\\u0019"</span>,
<span class="string">b'\x1a'</span> <span class="op">=></span> <span class="string">"\\u001a"</span>,
<span class="string">b'\x1b'</span> <span class="op">=></span> <span class="string">"\\u001b"</span>,
<span class="string">b'\x1c'</span> <span class="op">=></span> <span class="string">"\\u001c"</span>,
<span class="string">b'\x1d'</span> <span class="op">=></span> <span class="string">"\\u001d"</span>,
<span class="string">b'\x1e'</span> <span class="op">=></span> <span class="string">"\\u001e"</span>,
<span class="string">b'\x1f'</span> <span class="op">=></span> <span class="string">"\\u001f"</span>,
<span class="string">b'\x7f'</span> <span class="op">=></span> <span class="string">"\\u007f"</span>,
_ <span class="op">=></span> { <span class="kw">continue</span>; }
};
<span class="kw">if</span> <span class="ident">start</span> <span class="op"><</span> <span class="ident">i</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="kw-2">&</span><span class="ident">v</span>[<span class="ident">start</span>..<span class="ident">i</span>]));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="ident">escaped</span>));
<span class="ident">start</span> <span class="op">=</span> <span class="ident">i</span> <span class="op">+</span> <span class="number">1</span>;
}
<span class="kw">if</span> <span class="ident">start</span> <span class="op">!=</span> <span class="ident">v</span>.<span class="ident">len</span>() {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="kw-2">&</span><span class="ident">v</span>[<span class="ident">start</span>..]));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="string">"\""</span>));
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">escape_char</span>(<span class="ident">writer</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Write</span>, <span class="ident">v</span>: <span class="ident">char</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">4</span>];
<span class="kw">let</span> _ <span class="op">=</span> <span class="macro">write</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>[..], <span class="string">"{}"</span>, <span class="ident">v</span>);
<span class="kw">let</span> <span class="ident">buf</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">str</span>::<span class="ident">from_utf8_unchecked</span>(<span class="kw-2">&</span><span class="ident">buf</span>[..<span class="ident">v</span>.<span class="ident">len_utf8</span>()]) };
<span class="ident">escape_str</span>(<span class="ident">writer</span>, <span class="ident">buf</span>)
}
<span class="kw">fn</span> <span class="ident">spaces</span>(<span class="ident">wr</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Write</span>, <span class="ident">n</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">n</span> <span class="kw">as</span> <span class="ident">usize</span>;
<span class="kw">const</span> <span class="ident">BUF</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">" "</span>;
<span class="kw">while</span> <span class="ident">n</span> <span class="op">>=</span> <span class="ident">BUF</span>.<span class="ident">len</span>() {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="ident">BUF</span>));
<span class="ident">n</span> <span class="op">-=</span> <span class="ident">BUF</span>.<span class="ident">len</span>();
}
<span class="kw">if</span> <span class="ident">n</span> <span class="op">></span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">wr</span>.<span class="ident">write_str</span>(<span class="kw-2">&</span><span class="ident">BUF</span>[..<span class="ident">n</span>]));
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">fmt_number_or_null</span>(<span class="ident">v</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="ident">string</span>::<span class="ident">String</span> {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">num</span>::<span class="ident">FpCategory</span>::{<span class="ident">Nan</span>, <span class="ident">Infinite</span>};
<span class="kw">match</span> <span class="ident">v</span>.<span class="ident">classify</span>() {
<span class="ident">Nan</span> <span class="op">|</span> <span class="ident">Infinite</span> <span class="op">=></span> <span class="string">"null"</span>.<span class="ident">to_string</span>(),
_ <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">to_string</span>();
<span class="kw">if</span> <span class="ident">s</span>.<span class="ident">contains</span>(<span class="string">"."</span>) {<span class="ident">s</span>} <span class="kw">else</span> {<span class="ident">s</span> <span class="op">+</span> <span class="string">".0"</span>}
}
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">emit_enquoted_if_mapkey</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enc</span>:<span class="ident">ident</span>,<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>) <span class="op">=></span> {
<span class="kw">if</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">enc</span>.<span class="ident">is_emitting_map_key</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enc</span>.<span class="ident">writer</span>, <span class="string">"\"{}\""</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>));
<span class="prelude-val">Ok</span>(())
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">enc</span>.<span class="ident">writer</span>, <span class="string">"{}"</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>));
<span class="prelude-val">Ok</span>(())
}
}
}
<span class="kw">enum</span> <span class="ident">EncodingFormat</span> {
<span class="ident">Compact</span>,
<span class="ident">Pretty</span> {
<span class="ident">curr_indent</span>: <span class="ident">u32</span>,
<span class="ident">indent</span>: <span class="ident">u32</span>
}
}
<span class="doccomment">/// A structure for implementing serialization to JSON.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">writer</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> (<span class="ident">fmt</span>::<span class="ident">Write</span><span class="op">+</span><span class="lifetime">'a</span>),
<span class="ident">format</span> : <span class="ident">EncodingFormat</span>,
<span class="ident">is_emitting_map_key</span>: <span class="ident">bool</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="doccomment">/// Creates a new encoder whose output will be written in human-readable</span>
<span class="doccomment">/// JSON to the specified writer</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_pretty</span>(<span class="ident">writer</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Write</span>) <span class="op">-></span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">Encoder</span> {
<span class="ident">writer</span>: <span class="ident">writer</span>,
<span class="ident">format</span>: <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span> {
<span class="ident">curr_indent</span>: <span class="number">0</span>,
<span class="ident">indent</span>: <span class="number">2</span>,
},
<span class="ident">is_emitting_map_key</span>: <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// Creates a new encoder whose output will be written in compact</span>
<span class="doccomment">/// JSON to the specified writer</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">writer</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Write</span>) <span class="op">-></span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">Encoder</span> {
<span class="ident">writer</span>: <span class="ident">writer</span>,
<span class="ident">format</span>: <span class="ident">EncodingFormat</span>::<span class="ident">Compact</span>,
<span class="ident">is_emitting_map_key</span>: <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// Set the number of spaces to indent for each level.</span>
<span class="doccomment">/// This is safe to set during encoding.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_indent</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">new_indent</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), ()<span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="comment">// self.indent very well could be 0 so we need to use checked division.</span>
<span class="kw">let</span> <span class="ident">level</span> <span class="op">=</span> <span class="ident">curr_indent</span>.<span class="ident">checked_div</span>(<span class="kw-2">*</span><span class="ident">indent</span>).<span class="ident">unwrap_or</span>(<span class="number">0</span>);
<span class="kw-2">*</span><span class="ident">indent</span> <span class="op">=</span> <span class="ident">new_indent</span>;
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">=</span> <span class="ident">level</span> <span class="op">*</span> <span class="kw-2">*</span><span class="ident">indent</span>;
<span class="prelude-val">Ok</span>(())
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(())
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> ::<span class="ident">Encoder</span> <span class="kw">for</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">EncoderError</span>;
<span class="kw">fn</span> <span class="ident">emit_nil</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"null"</span>));
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_usize</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_u64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">u64</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_u32</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_u16</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">u16</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_u8</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_isize</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">isize</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_i64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">i64</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_i32</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">i32</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_i16</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">i16</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_i8</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">i8</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> { <span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">v</span>) }
<span class="kw">fn</span> <span class="ident">emit_bool</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">v</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"true"</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"false"</span>));
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_f64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="macro">emit_enquoted_if_mapkey</span><span class="macro">!</span>(<span class="self">self</span>, <span class="ident">fmt_number_or_null</span>(<span class="ident">v</span>))
}
<span class="kw">fn</span> <span class="ident">emit_f32</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">f32</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="self">self</span>.<span class="ident">emit_f64</span>(<span class="ident">v</span> <span class="kw">as</span> <span class="ident">f64</span>)
}
<span class="kw">fn</span> <span class="ident">emit_char</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="ident">char</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="ident">escape_char</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">v</span>)
}
<span class="kw">fn</span> <span class="ident">emit_str</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">v</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="ident">escape_str</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">v</span>)
}
<span class="kw">fn</span> <span class="ident">emit_enum</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_name</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_enum_variant</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">_id</span>: <span class="ident">usize</span>,
<span class="ident">cnt</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>)
<span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="comment">// enums are encoded as strings or objects</span>
<span class="comment">// Bunny => "Bunny"</span>
<span class="comment">// Kangaroo(34,"William") => {"variant": "Kangaroo", "fields": [34,"William"]}</span>
<span class="kw">if</span> <span class="ident">cnt</span> <span class="op">==</span> <span class="number">0</span> {
<span class="ident">escape_str</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">name</span>)
} <span class="kw">else</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{\n"</span>));
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">+=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\"variant\": "</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">escape_str</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">name</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">",\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\"fields\": [\n"</span>));
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">+=</span> <span class="ident">indent</span>;
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{\"variant\":"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">escape_str</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">name</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">",\"fields\":["</span>));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">-=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">-=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"]\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"}}"</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"]}}"</span>));
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="kw">fn</span> <span class="ident">emit_enum_variant_arg</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">idx</span> <span class="op">!=</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">","</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
}
}
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="ident">curr_indent</span>, ..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">curr_indent</span>));
}
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_enum_struct_variant</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">id</span>: <span class="ident">usize</span>,
<span class="ident">cnt</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_enum_variant</span>(<span class="ident">name</span>, <span class="ident">id</span>, <span class="ident">cnt</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_enum_struct_variant_field</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
_: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">idx</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_enum_variant_arg</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_struct</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, _: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{}}"</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{"</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">+=</span> <span class="ident">indent</span>;
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">-=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"}}"</span>));
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_struct_field</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">idx</span> <span class="op">!=</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">","</span>));
}
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="ident">curr_indent</span>, ..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">curr_indent</span>));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">escape_str</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">name</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">": "</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">":"</span>));
}
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_tuple</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_seq</span>(<span class="ident">len</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_tuple_arg</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_seq_elt</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_tuple_struct</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, _: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_seq</span>(<span class="ident">len</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_tuple_struct_arg</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_seq_elt</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">emit_option</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_option_none</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="self">self</span>.<span class="ident">emit_nil</span>()
}
<span class="kw">fn</span> <span class="ident">emit_option_some</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_seq</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"[]"</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"["</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">+=</span> <span class="ident">indent</span>;
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">-=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"]"</span>));
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_seq_elt</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">idx</span> <span class="op">!=</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">","</span>));
}
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, ..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
}
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">emit_map</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{}}"</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"{{"</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">+=</span> <span class="ident">indent</span>;
}
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">curr_indent</span>, <span class="ident">indent</span>} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="kw-2">*</span><span class="ident">curr_indent</span> <span class="op">-=</span> <span class="ident">indent</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="kw-2">*</span><span class="ident">curr_indent</span>));
}
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"}}"</span>));
}
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_map_elt_key</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="ident">idx</span> <span class="op">!=</span> <span class="number">0</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">","</span>));
}
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{<span class="ident">curr_indent</span>, ..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">"\n"</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">spaces</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="ident">curr_indent</span>));
}
<span class="self">self</span>.<span class="ident">is_emitting_map_key</span> <span class="op">=</span> <span class="bool-val">true</span>;
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="self">self</span>.<span class="ident">is_emitting_map_key</span> <span class="op">=</span> <span class="bool-val">false</span>;
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">emit_map_elt_val</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Encoder</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>) <span class="op">-></span> <span class="ident">EncodeResult</span><span class="op"><</span>()<span class="op">></span>,
{
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_emitting_map_key</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span>); }
<span class="kw">if</span> <span class="kw">let</span> <span class="ident">EncodingFormat</span>::<span class="ident">Pretty</span>{..} <span class="op">=</span> <span class="self">self</span>.<span class="ident">format</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">": "</span>));
} <span class="kw">else</span> {
<span class="macro">try</span><span class="macro">!</span>(<span class="macro">write</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">writer</span>, <span class="string">":"</span>));
}
<span class="ident">f</span>(<span class="self">self</span>)
}
}
<span class="kw">impl</span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="kw">fn</span> <span class="ident">encode</span><span class="op"><</span><span class="ident">S</span>: ::<span class="ident">Encoder</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">e</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">S</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">S</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">F64</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">String</span>(<span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">Boolean</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">e</span>),
<span class="ident">Json</span>::<span class="ident">Null</span> <span class="op">=></span> <span class="ident">e</span>.<span class="ident">emit_nil</span>(),
}
}
}
<span class="doccomment">/// Create an `AsJson` wrapper which can be used to print a value as JSON</span>
<span class="doccomment">/// on-the-fly via `write!`</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_json</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Encodable</span><span class="op">></span>(<span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="ident">AsJson</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">AsJson</span> { <span class="ident">inner</span>: <span class="ident">t</span> }
}
<span class="doccomment">/// Create an `AsPrettyJson` wrapper which can be used to print a value as JSON</span>
<span class="doccomment">/// on-the-fly via `write!`</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_pretty_json</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Encodable</span><span class="op">></span>(<span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="ident">AsPrettyJson</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">AsPrettyJson</span> { <span class="ident">inner</span>: <span class="ident">t</span>, <span class="ident">indent</span>: <span class="prelude-val">None</span> }
}
<span class="kw">impl</span> <span class="ident">Json</span> {
<span class="doccomment">/// Decodes a json value from an `&mut io::Read`</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_reader</span>(<span class="ident">rdr</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">io</span>::<span class="ident">Read</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">contents</span> <span class="op">=</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">rdr</span>.<span class="ident">read_to_end</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">c</span>));
<span class="ident">c</span>
};
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">str</span>::<span class="ident">from_utf8</span>(<span class="kw-2">&</span><span class="ident">contents</span>).<span class="ident">ok</span>() {
<span class="prelude-val">Some</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">s</span>,
_ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">NotUtf8</span>, <span class="number">0</span>, <span class="number">0</span>))
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">builder</span> <span class="op">=</span> <span class="ident">Builder</span>::<span class="ident">new</span>(<span class="ident">s</span>.<span class="ident">chars</span>());
<span class="ident">builder</span>.<span class="ident">build</span>()
}
<span class="doccomment">/// Decodes a json value from a string</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">builder</span> <span class="op">=</span> <span class="ident">Builder</span>::<span class="ident">new</span>(<span class="ident">s</span>.<span class="ident">chars</span>());
<span class="ident">builder</span>.<span class="ident">build</span>()
}
<span class="doccomment">/// Borrow this json object as a pretty object to generate a pretty</span>
<span class="doccomment">/// representation for it via `Display`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pretty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">PrettyJson</span> {
<span class="ident">PrettyJson</span> { <span class="ident">inner</span>: <span class="self">self</span> }
}
<span class="doccomment">/// If the Json value is an Object, returns the value associated with the provided key.</span>
<span class="doccomment">/// Otherwise, returns None.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">key</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Json</span><span class="op">></span>{
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">ref</span> <span class="ident">map</span>) <span class="op">=></span> <span class="ident">map</span>.<span class="ident">get</span>(<span class="ident">key</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Attempts to get a nested Json Object for each key in `keys`.</span>
<span class="doccomment">/// If any key is found not to exist, find_path will return None.</span>
<span class="doccomment">/// Otherwise, it will return the Json value associated with the final key.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find_path</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">keys</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Json</span><span class="op">></span>{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">target</span> <span class="op">=</span> <span class="self">self</span>;
<span class="kw">for</span> <span class="ident">key</span> <span class="kw">in</span> <span class="ident">keys</span>.<span class="ident">iter</span>() {
<span class="kw">match</span> <span class="ident">target</span>.<span class="ident">find</span>(<span class="kw-2">*</span><span class="ident">key</span>) {
<span class="prelude-val">Some</span>(<span class="ident">t</span>) <span class="op">=></span> { <span class="ident">target</span> <span class="op">=</span> <span class="ident">t</span>; },
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">None</span>
}
}
<span class="prelude-val">Some</span>(<span class="ident">target</span>)
}
<span class="doccomment">/// If the Json value is an Object, performs a depth-first search until</span>
<span class="doccomment">/// a value associated with the provided key is found. If no value is found</span>
<span class="doccomment">/// or the Json value is not an Object, returns None.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">search</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">key</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Json</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">ref</span> <span class="ident">map</span>) <span class="op">=></span> {
<span class="kw">match</span> <span class="ident">map</span>.<span class="ident">get</span>(<span class="ident">key</span>) {
<span class="prelude-val">Some</span>(<span class="ident">json_value</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">json_value</span>),
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="kw">for</span> (_, <span class="ident">v</span>) <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">iter</span>() {
<span class="kw">match</span> <span class="ident">v</span>.<span class="ident">search</span>(<span class="ident">key</span>) {
<span class="ident">x</span> <span class="kw">if</span> <span class="ident">x</span>.<span class="ident">is_some</span>() <span class="op">=></span> <span class="kw">return</span> <span class="ident">x</span>,
_ <span class="op">=></span> ()
}
}
<span class="prelude-val">None</span>
}
}
},
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is an Object. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_object</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">as_object</span>().<span class="ident">is_some</span>()
}
<span class="doccomment">/// If the Json value is an Object, returns a reference to the associated BTreeMap.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_object</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Object</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">ref</span> <span class="ident">map</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">map</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is an Object, returns a mutable reference to the associated BTreeMap.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_object_mut</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Object</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">map</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">map</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is an Object, returns the associated BTreeMap.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_object</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Object</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="ident">map</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">map</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is an Array. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_array</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">as_array</span>().<span class="ident">is_some</span>()
}
<span class="doccomment">/// If the Json value is an Array, returns a reference to the associated vector.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_array</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Array</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="ident">array</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">array</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is an Array, returns a mutable reference to the associated vector.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_array_mut</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Array</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Json</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">list</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">list</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is an Array, returns the associated vector.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_array</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Array</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">Array</span>(<span class="ident">array</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">array</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is a String. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_string</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">as_string</span>().<span class="ident">is_some</span>()
}
<span class="doccomment">/// If the Json value is a String, returns the associated str.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_string</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">String</span>(<span class="kw-2">ref</span> <span class="ident">s</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">s</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is a Number. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_number</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(_) <span class="op">|</span> <span class="ident">Json</span>::<span class="ident">U64</span>(_) <span class="op">|</span> <span class="ident">Json</span>::<span class="ident">F64</span>(_) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// Returns true if the Json value is a i64. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_i64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(_) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// Returns true if the Json value is a u64. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_u64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">U64</span>(_) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// Returns true if the Json value is a f64. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_f64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">F64</span>(_) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
<span class="doccomment">/// If the Json value is a number, return or cast it to a i64.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_i64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">i64</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span>),
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">n</span>) <span class="kw">if</span> <span class="ident">n</span> <span class="op">>=</span> <span class="ident">i64</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">=></span> <span class="prelude-val">None</span>,
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span> <span class="kw">as</span> <span class="ident">i64</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is a number, return or cast it to a u64.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_u64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u64</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">n</span>) <span class="kw">if</span> <span class="ident">n</span> <span class="op">>=</span> <span class="number">0</span> <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span> <span class="kw">as</span> <span class="ident">u64</span>),
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// If the Json value is a number, return or cast it to a f64.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_f64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span> <span class="kw">as</span> <span class="ident">f64</span>),
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span> <span class="kw">as</span> <span class="ident">f64</span>),
<span class="ident">Json</span>::<span class="ident">F64</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">n</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is a Boolean. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_boolean</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">as_boolean</span>().<span class="ident">is_some</span>()
}
<span class="doccomment">/// If the Json value is a Boolean, returns the associated bool.</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_boolean</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Boolean</span>(<span class="ident">b</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">b</span>),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
<span class="doccomment">/// Returns true if the Json value is a Null. Returns false otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_null</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">as_null</span>().<span class="ident">is_some</span>()
}
<span class="doccomment">/// If the Json value is a Null, returns ().</span>
<span class="doccomment">/// Returns None otherwise.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_null</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>()<span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Null</span> <span class="op">=></span> <span class="prelude-val">Some</span>(()),
_ <span class="op">=></span> <span class="prelude-val">None</span>
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Index</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Json</span>;
<span class="kw">fn</span> <span class="ident">index</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">idx</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">Json</span> {
<span class="self">self</span>.<span class="ident">find</span>(<span class="ident">idx</span>).<span class="ident">unwrap</span>()
}
}
<span class="kw">impl</span> <span class="ident">Index</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Json</span>;
<span class="kw">fn</span> <span class="ident">index</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Json</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="kw-2">&</span><span class="ident">Json</span>::<span class="ident">Array</span>(<span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=></span> <span class="kw-2">&</span><span class="ident">v</span>[<span class="ident">idx</span>],
_ <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"can only index Json with usize if it is an array"</span>)
}
}
}
<span class="doccomment">/// The output of the streaming parser.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">JsonEvent</span> {
<span class="ident">ObjectStart</span>,
<span class="ident">ObjectEnd</span>,
<span class="ident">ArrayStart</span>,
<span class="ident">ArrayEnd</span>,
<span class="ident">BooleanValue</span>(<span class="ident">bool</span>),
<span class="ident">I64Value</span>(<span class="ident">i64</span>),
<span class="ident">U64Value</span>(<span class="ident">u64</span>),
<span class="ident">F64Value</span>(<span class="ident">f64</span>),
<span class="ident">StringValue</span>(<span class="ident">string</span>::<span class="ident">String</span>),
<span class="ident">NullValue</span>,
<span class="ident">Error</span>(<span class="ident">ParserError</span>),
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">enum</span> <span class="ident">ParserState</span> {
<span class="comment">// Parse a value in an array, true means first element.</span>
<span class="ident">ParseArray</span>(<span class="ident">bool</span>),
<span class="comment">// Parse ',' or ']' after an element in an array.</span>
<span class="ident">ParseArrayComma</span>,
<span class="comment">// Parse a key:value in an object, true means first element.</span>
<span class="ident">ParseObject</span>(<span class="ident">bool</span>),
<span class="comment">// Parse ',' or ']' after an element in an object.</span>
<span class="ident">ParseObjectComma</span>,
<span class="comment">// Initial state.</span>
<span class="ident">ParseStart</span>,
<span class="comment">// Expecting the stream to end.</span>
<span class="ident">ParseBeforeFinish</span>,
<span class="comment">// Parsing can't continue.</span>
<span class="ident">ParseFinished</span>,
}
<span class="doccomment">/// A Stack represents the current position of the parser in the logical</span>
<span class="doccomment">/// structure of the JSON stream.</span>
<span class="doccomment">/// For example foo.bar[3].x</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Stack</span> {
<span class="ident">stack</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">InternalStackElement</span><span class="op">></span>,
<span class="ident">str_buffer</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>,
}
<span class="doccomment">/// StackElements compose a Stack.</span>
<span class="doccomment">/// For example, Key("foo"), Key("bar"), Index(3) and Key("x") are the</span>
<span class="doccomment">/// StackElements compositing the stack that represents foo.bar[3].x</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">StackElement</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">></span> {
<span class="ident">Index</span>(<span class="ident">u32</span>),
<span class="ident">Key</span>(<span class="kw-2">&</span><span class="lifetime">'l</span> <span class="ident">str</span>),
}
<span class="comment">// Internally, Key elements are stored as indices in a buffer to avoid</span>
<span class="comment">// allocating a string for every member of an object.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">enum</span> <span class="ident">InternalStackElement</span> {
<span class="ident">InternalIndex</span>(<span class="ident">u32</span>),
<span class="ident">InternalKey</span>(<span class="ident">u16</span>, <span class="ident">u16</span>), <span class="comment">// start, size</span>
}
<span class="kw">impl</span> <span class="ident">Stack</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">Stack</span> {
<span class="ident">Stack</span> { <span class="ident">stack</span>: <span class="ident">Vec</span>::<span class="ident">new</span>(), <span class="ident">str_buffer</span>: <span class="ident">Vec</span>::<span class="ident">new</span>() }
}
<span class="doccomment">/// Returns The number of elements in the Stack.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>() }
<span class="doccomment">/// Returns true if the stack is empty.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() }
<span class="doccomment">/// Provides access to the StackElement at a given index.</span>
<span class="doccomment">/// lower indices are at the bottom of the stack while higher indices are</span>
<span class="doccomment">/// at the top.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'l</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">StackElement</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">stack</span>[<span class="ident">idx</span>] {
<span class="ident">InternalIndex</span>(<span class="ident">i</span>) <span class="op">=></span> <span class="ident">StackElement</span>::<span class="ident">Index</span>(<span class="ident">i</span>),
<span class="ident">InternalKey</span>(<span class="ident">start</span>, <span class="ident">size</span>) <span class="op">=></span> {
<span class="ident">StackElement</span>::<span class="ident">Key</span>(<span class="ident">str</span>::<span class="ident">from_utf8</span>(
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">str_buffer</span>[<span class="ident">start</span> <span class="kw">as</span> <span class="ident">usize</span> .. <span class="ident">start</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">+</span> <span class="ident">size</span> <span class="kw">as</span> <span class="ident">usize</span>]).<span class="ident">unwrap</span>())
}
}
}
<span class="doccomment">/// Compares this stack with an array of StackElements.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_equal_to</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span>[<span class="ident">StackElement</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">!=</span> <span class="ident">rhs</span>.<span class="ident">len</span>() { <span class="kw">return</span> <span class="bool-val">false</span>; }
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">rhs</span>.<span class="ident">len</span>() {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">get</span>(<span class="ident">i</span>) <span class="op">!=</span> <span class="ident">rhs</span>[<span class="ident">i</span>] { <span class="kw">return</span> <span class="bool-val">false</span>; }
}
<span class="kw">return</span> <span class="bool-val">true</span>;
}
<span class="doccomment">/// Returns true if the bottom-most elements of this stack are the same as</span>
<span class="doccomment">/// the ones passed as parameter.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">starts_with</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span>[<span class="ident">StackElement</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">rhs</span>.<span class="ident">len</span>() { <span class="kw">return</span> <span class="bool-val">false</span>; }
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">rhs</span>.<span class="ident">len</span>() {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">get</span>(<span class="ident">i</span>) <span class="op">!=</span> <span class="ident">rhs</span>[<span class="ident">i</span>] { <span class="kw">return</span> <span class="bool-val">false</span>; }
}
<span class="kw">return</span> <span class="bool-val">true</span>;
}
<span class="doccomment">/// Returns true if the top-most elements of this stack are the same as</span>
<span class="doccomment">/// the ones passed as parameter.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ends_with</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span>[<span class="ident">StackElement</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">rhs</span>.<span class="ident">len</span>() { <span class="kw">return</span> <span class="bool-val">false</span>; }
<span class="kw">let</span> <span class="ident">offset</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">rhs</span>.<span class="ident">len</span>();
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">rhs</span>.<span class="ident">len</span>() {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">get</span>(<span class="ident">i</span> <span class="op">+</span> <span class="ident">offset</span>) <span class="op">!=</span> <span class="ident">rhs</span>[<span class="ident">i</span>] { <span class="kw">return</span> <span class="bool-val">false</span>; }
}
<span class="kw">return</span> <span class="bool-val">true</span>;
}
<span class="doccomment">/// Returns the top-most element (if any).</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">top</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'l</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">StackElement</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">>></span> {
<span class="kw">return</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">InternalIndex</span>(<span class="ident">i</span>)) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">StackElement</span>::<span class="ident">Index</span>(<span class="ident">i</span>)),
<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">InternalKey</span>(<span class="ident">start</span>, <span class="ident">size</span>)) <span class="op">=></span> {
<span class="prelude-val">Some</span>(<span class="ident">StackElement</span>::<span class="ident">Key</span>(<span class="ident">str</span>::<span class="ident">from_utf8</span>(
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">str_buffer</span>[<span class="ident">start</span> <span class="kw">as</span> <span class="ident">usize</span> .. (<span class="ident">start</span><span class="op">+</span><span class="ident">size</span>) <span class="kw">as</span> <span class="ident">usize</span>]
).<span class="ident">unwrap</span>()))
}
}
}
<span class="comment">// Used by Parser to insert Key elements at the top of the stack.</span>
<span class="kw">fn</span> <span class="ident">push_key</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">key</span>: <span class="ident">string</span>::<span class="ident">String</span>) {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">InternalKey</span>(<span class="self">self</span>.<span class="ident">str_buffer</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u16</span>, <span class="ident">key</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u16</span>));
<span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> <span class="ident">key</span>.<span class="ident">as_bytes</span>().<span class="ident">iter</span>() {
<span class="self">self</span>.<span class="ident">str_buffer</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">c</span>);
}
}
<span class="comment">// Used by Parser to insert Index elements at the top of the stack.</span>
<span class="kw">fn</span> <span class="ident">push_index</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">u32</span>) {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">InternalIndex</span>(<span class="ident">index</span>));
}
<span class="comment">// Used by Parser to remove the top-most element of the stack.</span>
<span class="kw">fn</span> <span class="ident">pop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="self">self</span>.<span class="ident">is_empty</span>());
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>() {
<span class="ident">InternalKey</span>(_, <span class="ident">sz</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">new_size</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">str_buffer</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">sz</span> <span class="kw">as</span> <span class="ident">usize</span>;
<span class="self">self</span>.<span class="ident">str_buffer</span>.<span class="ident">truncate</span>(<span class="ident">new_size</span>);
}
<span class="ident">InternalIndex</span>(_) <span class="op">=></span> {}
}
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">pop</span>();
}
<span class="comment">// Used by Parser to test whether the top-most element is an index.</span>
<span class="kw">fn</span> <span class="ident">last_is_index</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_empty</span>() { <span class="kw">return</span> <span class="bool-val">false</span>; }
<span class="kw">return</span> <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>() {
<span class="ident">InternalIndex</span>(_) <span class="op">=></span> <span class="bool-val">true</span>,
_ <span class="op">=></span> <span class="bool-val">false</span>,
}
}
<span class="comment">// Used by Parser to increment the index of the top-most element.</span>
<span class="kw">fn</span> <span class="ident">bump_index</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">idx</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>() {
<span class="ident">InternalIndex</span>(<span class="ident">i</span>) <span class="op">=></span> { <span class="ident">i</span> <span class="op">+</span> <span class="number">1</span> }
_ <span class="op">=></span> { <span class="macro">panic</span><span class="macro">!</span>(); }
};
<span class="self">self</span>.<span class="ident">stack</span>[<span class="ident">len</span> <span class="op">-</span> <span class="number">1</span>] <span class="op">=</span> <span class="ident">InternalIndex</span>(<span class="ident">idx</span>);
}
}
<span class="doccomment">/// A streaming JSON parser implemented as an iterator of JsonEvent, consuming</span>
<span class="doccomment">/// an iterator of char.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Parser</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">rdr</span>: <span class="ident">T</span>,
<span class="ident">ch</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">char</span><span class="op">></span>,
<span class="ident">line</span>: <span class="ident">usize</span>,
<span class="ident">col</span>: <span class="ident">usize</span>,
<span class="comment">// We maintain a stack representing where we are in the logical structure</span>
<span class="comment">// of the JSON stream.</span>
<span class="ident">stack</span>: <span class="ident">Stack</span>,
<span class="comment">// A state machine is kept to make it possible to interrupt and resume parsing.</span>
<span class="ident">state</span>: <span class="ident">ParserState</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">char</span><span class="op">>></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Parser</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">JsonEvent</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">JsonEvent</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">state</span> <span class="op">==</span> <span class="ident">ParseFinished</span> {
<span class="kw">return</span> <span class="prelude-val">None</span>;
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">state</span> <span class="op">==</span> <span class="ident">ParseBeforeFinish</span> {
<span class="self">self</span>.<span class="ident">parse_whitespace</span>();
<span class="comment">// Make sure there is no trailing characters.</span>
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="ident">ParseFinished</span>;
<span class="kw">return</span> <span class="prelude-val">None</span>;
} <span class="kw">else</span> {
<span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">TrailingCharacters</span>));
}
}
<span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">parse</span>());
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">char</span><span class="op">>></span> <span class="ident">Parser</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Creates the JSON parser.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">rdr</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="ident">Parser</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">Parser</span> {
<span class="ident">rdr</span>: <span class="ident">rdr</span>,
<span class="ident">ch</span>: <span class="prelude-val">Some</span>(<span class="string">'\x00'</span>),
<span class="ident">line</span>: <span class="number">1</span>,
<span class="ident">col</span>: <span class="number">0</span>,
<span class="ident">stack</span>: <span class="ident">Stack</span>::<span class="ident">new</span>(),
<span class="ident">state</span>: <span class="ident">ParseStart</span>,
};
<span class="ident">p</span>.<span class="ident">bump</span>();
<span class="kw">return</span> <span class="ident">p</span>;
}
<span class="doccomment">/// Provides access to the current position in the logical structure of the</span>
<span class="doccomment">/// JSON stream.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">stack</span><span class="op"><</span><span class="lifetime">'l</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'l</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="lifetime">'l</span> <span class="ident">Stack</span> {
<span class="kw">return</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">stack</span>;
}
<span class="kw">fn</span> <span class="ident">eof</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">ch</span>.<span class="ident">is_none</span>() }
<span class="kw">fn</span> <span class="ident">ch_or_null</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">char</span> { <span class="self">self</span>.<span class="ident">ch</span>.<span class="ident">unwrap_or</span>(<span class="string">'\x00'</span>) }
<span class="kw">fn</span> <span class="ident">bump</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="self">self</span>.<span class="ident">ch</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">rdr</span>.<span class="ident">next</span>();
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'\n'</span>) {
<span class="self">self</span>.<span class="ident">line</span> <span class="op">+=</span> <span class="number">1</span>;
<span class="self">self</span>.<span class="ident">col</span> <span class="op">=</span> <span class="number">1</span>;
} <span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">col</span> <span class="op">+=</span> <span class="number">1</span>;
}
}
<span class="kw">fn</span> <span class="ident">next_char</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">char</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="self">self</span>.<span class="ident">ch</span>
}
<span class="kw">fn</span> <span class="ident">ch_is</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">c</span>: <span class="ident">char</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">ch</span> <span class="op">==</span> <span class="prelude-val">Some</span>(<span class="ident">c</span>)
}
<span class="kw">fn</span> <span class="ident">error</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">reason</span>: <span class="ident">ErrorCode</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">E</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">reason</span>, <span class="self">self</span>.<span class="ident">line</span>, <span class="self">self</span>.<span class="ident">col</span>))
}
<span class="kw">fn</span> <span class="ident">parse_whitespace</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="kw">while</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">' '</span>) <span class="op">||</span>
<span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'\n'</span>) <span class="op">||</span>
<span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'\t'</span>) <span class="op">||</span>
<span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'\r'</span>) { <span class="self">self</span>.<span class="ident">bump</span>(); }
}
<span class="kw">fn</span> <span class="ident">parse_number</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">neg</span> <span class="op">=</span> <span class="bool-val">false</span>;
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'-'</span>) {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">neg</span> <span class="op">=</span> <span class="bool-val">true</span>;
}
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_u64</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">res</span>) <span class="op">=></span> <span class="ident">res</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">e</span>); }
};
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'.'</span>) <span class="op">||</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'e'</span>) <span class="op">||</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'E'</span>) {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">res</span> <span class="kw">as</span> <span class="ident">f64</span>;
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'.'</span>) {
<span class="ident">res</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_decimal</span>(<span class="ident">res</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">res</span>) <span class="op">=></span> <span class="ident">res</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">e</span>); }
};
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'e'</span>) <span class="op">||</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'E'</span>) {
<span class="ident">res</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_exponent</span>(<span class="ident">res</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">res</span>) <span class="op">=></span> <span class="ident">res</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">e</span>); }
};
}
<span class="kw">if</span> <span class="ident">neg</span> {
<span class="ident">res</span> <span class="op">*=</span> <span class="op">-</span><span class="number">1.0</span>;
}
<span class="ident">F64Value</span>(<span class="ident">res</span>)
} <span class="kw">else</span> {
<span class="kw">if</span> <span class="ident">neg</span> {
<span class="comment">// Make sure we don't underflow.</span>
<span class="kw">if</span> <span class="ident">res</span> <span class="op">></span> (<span class="ident">i64</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u64</span>) <span class="op">+</span> <span class="number">1</span> {
<span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="self">self</span>.<span class="ident">line</span>, <span class="self">self</span>.<span class="ident">col</span>))
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">res</span> <span class="op">==</span> <span class="number">0</span> {
<span class="ident">I64Value</span>(<span class="ident">res</span> <span class="kw">as</span> <span class="ident">i64</span>)
} <span class="kw">else</span> {
<span class="ident">I64Value</span>((<span class="op">!</span><span class="ident">res</span> <span class="op">+</span> <span class="number">1</span>) <span class="kw">as</span> <span class="ident">i64</span>)
}
} <span class="kw">else</span> {
<span class="ident">U64Value</span>(<span class="ident">res</span>)
}
}
}
<span class="kw">fn</span> <span class="ident">parse_u64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u64</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">accum</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'0'</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="comment">// A leading '0' must be the only digit before the decimal point.</span>
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidNumber</span>),
_ <span class="op">=></span> ()
}
},
<span class="string">'1'</span> ... <span class="string">'9'</span> <span class="op">=></span> {
<span class="kw">while</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="ident">c</span> @ <span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> {
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">try_or_invalid</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>: <span class="ident">expr</span>) <span class="op">=></span> {
<span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span> {
<span class="prelude-val">Some</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidNumber</span>)
}
}
}
<span class="ident">accum</span> <span class="op">=</span> <span class="macro">try_or_invalid</span><span class="macro">!</span>(<span class="ident">accum</span>.<span class="ident">checked_mul</span>(<span class="number">10</span>));
<span class="ident">accum</span> <span class="op">=</span> <span class="macro">try_or_invalid</span><span class="macro">!</span>(<span class="ident">accum</span>.<span class="ident">checked_add</span>((<span class="ident">c</span> <span class="kw">as</span> <span class="ident">u64</span>) <span class="op">-</span> (<span class="string">'0'</span> <span class="kw">as</span> <span class="ident">u64</span>)));
<span class="self">self</span>.<span class="ident">bump</span>();
}
_ <span class="op">=></span> <span class="kw">break</span>,
}
}
}
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidNumber</span>),
}
<span class="prelude-val">Ok</span>(<span class="ident">accum</span>)
}
<span class="kw">fn</span> <span class="ident">parse_decimal</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">res</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">f64</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="comment">// Make sure a digit follows the decimal place.</span>
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> (),
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidNumber</span>)
}
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dec</span> <span class="op">=</span> <span class="number">1.0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">frac</span> <span class="op">=</span> <span class="number">0.0</span>;
<span class="kw">while</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="ident">c</span> @ <span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> {
<span class="ident">dec</span> <span class="op">/=</span> <span class="number">10.0</span>;
<span class="ident">frac</span> <span class="op">+=</span> (((<span class="ident">c</span> <span class="kw">as</span> <span class="ident">isize</span>) <span class="op">-</span> (<span class="string">'0'</span> <span class="kw">as</span> <span class="ident">isize</span>)) <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">dec</span>;
<span class="self">self</span>.<span class="ident">bump</span>();
}
_ <span class="op">=></span> <span class="kw">break</span>,
}
}
<span class="ident">res</span> <span class="op">+=</span> <span class="ident">frac</span>;
<span class="prelude-val">Ok</span>(<span class="ident">res</span>)
}
<span class="kw">fn</span> <span class="ident">parse_exponent</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">res</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">f64</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">exp</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">neg_exp</span> <span class="op">=</span> <span class="bool-val">false</span>;
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'+'</span>) {
<span class="self">self</span>.<span class="ident">bump</span>();
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'-'</span>) {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">neg_exp</span> <span class="op">=</span> <span class="bool-val">true</span>;
}
<span class="comment">// Make sure a digit follows the exponent place.</span>
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> (),
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidNumber</span>)
}
<span class="kw">while</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="ident">c</span> @ <span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> {
<span class="ident">exp</span> <span class="op">*=</span> <span class="number">10</span>;
<span class="ident">exp</span> <span class="op">+=</span> (<span class="ident">c</span> <span class="kw">as</span> <span class="ident">usize</span>) <span class="op">-</span> (<span class="string">'0'</span> <span class="kw">as</span> <span class="ident">usize</span>);
<span class="self">self</span>.<span class="ident">bump</span>();
}
_ <span class="op">=></span> <span class="kw">break</span>
}
}
<span class="kw">let</span> <span class="ident">exp</span> <span class="op">=</span> <span class="number">10_f64</span>.<span class="ident">powi</span>(<span class="ident">exp</span> <span class="kw">as</span> <span class="ident">i32</span>);
<span class="kw">if</span> <span class="ident">neg_exp</span> {
<span class="ident">res</span> <span class="op">/=</span> <span class="ident">exp</span>;
} <span class="kw">else</span> {
<span class="ident">res</span> <span class="op">*=</span> <span class="ident">exp</span>;
}
<span class="prelude-val">Ok</span>(<span class="ident">res</span>)
}
<span class="kw">fn</span> <span class="ident">decode_hex_escape</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u16</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">while</span> <span class="ident">i</span> <span class="op"><</span> <span class="number">4</span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">n</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="ident">c</span> @ <span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">=></span> <span class="ident">n</span> <span class="op">*</span> <span class="number">16</span> <span class="op">+</span> ((<span class="ident">c</span> <span class="kw">as</span> <span class="ident">u16</span>) <span class="op">-</span> (<span class="string">'0'</span> <span class="kw">as</span> <span class="ident">u16</span>)),
<span class="ident">c</span> @ <span class="string">'a'</span> ... <span class="string">'f'</span> <span class="op">=></span> <span class="ident">n</span> <span class="op">*</span> <span class="number">16</span> <span class="op">+</span> (<span class="number">10</span> <span class="op">+</span> (<span class="ident">c</span> <span class="kw">as</span> <span class="ident">u16</span>) <span class="op">-</span> (<span class="string">'a'</span> <span class="kw">as</span> <span class="ident">u16</span>)),
<span class="ident">c</span> @ <span class="string">'A'</span> ... <span class="string">'F'</span> <span class="op">=></span> <span class="ident">n</span> <span class="op">*</span> <span class="number">16</span> <span class="op">+</span> (<span class="number">10</span> <span class="op">+</span> (<span class="ident">c</span> <span class="kw">as</span> <span class="ident">u16</span>) <span class="op">-</span> (<span class="string">'A'</span> <span class="kw">as</span> <span class="ident">u16</span>)),
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidEscape</span>)
};
<span class="ident">i</span> <span class="op">+=</span> <span class="number">1</span>;
}
<span class="prelude-val">Ok</span>(<span class="ident">n</span>)
}
<span class="kw">fn</span> <span class="ident">parse_str</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">escape</span> <span class="op">=</span> <span class="bool-val">false</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">string</span>::<span class="ident">String</span>::<span class="ident">new</span>();
<span class="kw">loop</span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">EOFWhileParsingString</span>);
}
<span class="kw">if</span> <span class="ident">escape</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'"'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'"'</span>),
<span class="string">'\\'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\\'</span>),
<span class="string">'/'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'/'</span>),
<span class="string">'b'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\x08'</span>),
<span class="string">'f'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\x0c'</span>),
<span class="string">'n'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\n'</span>),
<span class="string">'r'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\r'</span>),
<span class="string">'t'</span> <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="string">'\t'</span>),
<span class="string">'u'</span> <span class="op">=></span> <span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">decode_hex_escape</span>()) {
<span class="number">0xDC00</span> ... <span class="number">0xDFFF</span> <span class="op">=></span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">LoneLeadingSurrogateInHexEscape</span>)
}
<span class="comment">// Non-BMP characters are encoded as a sequence of</span>
<span class="comment">// two hex escapes, representing UTF-16 surrogates.</span>
<span class="ident">n1</span> @ <span class="number">0xD800</span> ... <span class="number">0xDBFF</span> <span class="op">=></span> {
<span class="kw">match</span> (<span class="self">self</span>.<span class="ident">next_char</span>(), <span class="self">self</span>.<span class="ident">next_char</span>()) {
(<span class="prelude-val">Some</span>(<span class="string">'\\'</span>), <span class="prelude-val">Some</span>(<span class="string">'u'</span>)) <span class="op">=></span> (),
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">UnexpectedEndOfHexEscape</span>),
}
<span class="kw">let</span> <span class="ident">n2</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">decode_hex_escape</span>());
<span class="kw">if</span> <span class="ident">n2</span> <span class="op"><</span> <span class="number">0xDC00</span> <span class="op">||</span> <span class="ident">n2</span> <span class="op">></span> <span class="number">0xDFFF</span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">LoneLeadingSurrogateInHexEscape</span>)
}
<span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> (((<span class="ident">n1</span> <span class="op">-</span> <span class="number">0xD800</span>) <span class="kw">as</span> <span class="ident">u32</span>) <span class="op"><<</span> <span class="number">10</span> <span class="op">|</span>
(<span class="ident">n2</span> <span class="op">-</span> <span class="number">0xDC00</span>) <span class="kw">as</span> <span class="ident">u32</span>) <span class="op">+</span> <span class="number">0x1_0000</span>;
<span class="ident">res</span>.<span class="ident">push</span>(<span class="ident">char</span>::<span class="ident">from_u32</span>(<span class="ident">c</span>).<span class="ident">unwrap</span>());
}
<span class="ident">n</span> <span class="op">=></span> <span class="kw">match</span> <span class="ident">char</span>::<span class="ident">from_u32</span>(<span class="ident">n</span> <span class="kw">as</span> <span class="ident">u32</span>) {
<span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="ident">c</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidUnicodeCodePoint</span>),
},
},
_ <span class="op">=></span> <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">InvalidEscape</span>),
}
<span class="ident">escape</span> <span class="op">=</span> <span class="bool-val">false</span>;
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'\\'</span>) {
<span class="ident">escape</span> <span class="op">=</span> <span class="bool-val">true</span>;
} <span class="kw">else</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch</span> {
<span class="prelude-val">Some</span>(<span class="string">'"'</span>) <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">res</span>);
},
<span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="kw">if</span> <span class="ident">c</span> <span class="op"><=</span> <span class="string">'\u{1F}'</span> <span class="op">=></span>
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error</span>(<span class="ident">ControlCharacterInString</span>),
<span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="ident">res</span>.<span class="ident">push</span>(<span class="ident">c</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>()
}
}
}
}
<span class="comment">// Invoked at each iteration, consumes the stream until it has enough</span>
<span class="comment">// information to return a JsonEvent.</span>
<span class="comment">// Manages an internal state so that parsing can be interrupted and resumed.</span>
<span class="comment">// Also keeps track of the position in the logical structure of the json</span>
<span class="comment">// stream int the form of a stack that can be queried by the user using the</span>
<span class="comment">// stack() method.</span>
<span class="kw">fn</span> <span class="ident">parse</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">loop</span> {
<span class="comment">// The only paths where the loop can spin a new iteration</span>
<span class="comment">// are in the cases ParseArrayComma and ParseObjectComma if ','</span>
<span class="comment">// is parsed. In these cases the state is set to (respectively)</span>
<span class="comment">// ParseArray(false) and ParseObject(false), which always return,</span>
<span class="comment">// so there is no risk of getting stuck in an infinite loop.</span>
<span class="comment">// All other paths return before the end of the loop's iteration.</span>
<span class="self">self</span>.<span class="ident">parse_whitespace</span>();
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">state</span> {
<span class="ident">ParseStart</span> <span class="op">=></span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">parse_start</span>();
}
<span class="ident">ParseArray</span>(<span class="ident">first</span>) <span class="op">=></span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">parse_array</span>(<span class="ident">first</span>);
}
<span class="ident">ParseArrayComma</span> <span class="op">=></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_array_comma_or_end</span>() {
<span class="prelude-val">Some</span>(<span class="ident">evt</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="ident">evt</span>; }
<span class="prelude-val">None</span> <span class="op">=></span> {}
}
}
<span class="ident">ParseObject</span>(<span class="ident">first</span>) <span class="op">=></span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">parse_object</span>(<span class="ident">first</span>);
}
<span class="ident">ParseObjectComma</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">pop</span>();
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">','</span>) {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="ident">ParseObject</span>(<span class="bool-val">false</span>);
<span class="self">self</span>.<span class="ident">bump</span>();
} <span class="kw">else</span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">parse_object_end</span>();
}
}
_ <span class="op">=></span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">InvalidSyntax</span>);
}
}
}
}
<span class="kw">fn</span> <span class="ident">parse_start</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">parse_value</span>();
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">val</span> {
<span class="ident">Error</span>(_) <span class="op">=></span> <span class="ident">ParseFinished</span>,
<span class="ident">ArrayStart</span> <span class="op">=></span> <span class="ident">ParseArray</span>(<span class="bool-val">true</span>),
<span class="ident">ObjectStart</span> <span class="op">=></span> <span class="ident">ParseObject</span>(<span class="bool-val">true</span>),
_ <span class="op">=></span> <span class="ident">ParseBeforeFinish</span>,
};
<span class="kw">return</span> <span class="ident">val</span>;
}
<span class="kw">fn</span> <span class="ident">parse_array</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">first</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">']'</span>) {
<span class="kw">if</span> <span class="op">!</span><span class="ident">first</span> {
<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">InvalidSyntax</span>)
} <span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() {
<span class="ident">ParseBeforeFinish</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last_is_index</span>() {
<span class="ident">ParseArrayComma</span>
} <span class="kw">else</span> {
<span class="ident">ParseObjectComma</span>
};
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">ArrayEnd</span>
}
} <span class="kw">else</span> {
<span class="kw">if</span> <span class="ident">first</span> {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push_index</span>(<span class="number">0</span>);
}
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">parse_value</span>();
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">val</span> {
<span class="ident">Error</span>(_) <span class="op">=></span> <span class="ident">ParseFinished</span>,
<span class="ident">ArrayStart</span> <span class="op">=></span> <span class="ident">ParseArray</span>(<span class="bool-val">true</span>),
<span class="ident">ObjectStart</span> <span class="op">=></span> <span class="ident">ParseObject</span>(<span class="bool-val">true</span>),
_ <span class="op">=></span> <span class="ident">ParseArrayComma</span>,
};
<span class="ident">val</span>
}
}
<span class="kw">fn</span> <span class="ident">parse_array_comma_or_end</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">JsonEvent</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">','</span>) {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">bump_index</span>();
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="ident">ParseArray</span>(<span class="bool-val">false</span>);
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="prelude-val">None</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">']'</span>) {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">pop</span>();
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() {
<span class="ident">ParseBeforeFinish</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last_is_index</span>() {
<span class="ident">ParseArrayComma</span>
} <span class="kw">else</span> {
<span class="ident">ParseObjectComma</span>
};
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="prelude-val">Some</span>(<span class="ident">ArrayEnd</span>)
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">EOFWhileParsingArray</span>))
} <span class="kw">else</span> {
<span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">InvalidSyntax</span>))
}
}
<span class="kw">fn</span> <span class="ident">parse_object</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">first</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'}'</span>) {
<span class="kw">if</span> <span class="op">!</span><span class="ident">first</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">TrailingComma</span>);
} <span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">pop</span>();
}
}
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() {
<span class="ident">ParseBeforeFinish</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last_is_index</span>() {
<span class="ident">ParseArrayComma</span>
} <span class="kw">else</span> {
<span class="ident">ParseObjectComma</span>
};
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">return</span> <span class="ident">ObjectEnd</span>;
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">EOFWhileParsingObject</span>);
}
<span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'"'</span>) {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">KeyMustBeAString</span>);
}
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_str</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">s</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="ident">ParseFinished</span>;
<span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">e</span>);
}
};
<span class="self">self</span>.<span class="ident">parse_whitespace</span>();
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">EOFWhileParsingObject</span>);
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() <span class="op">!=</span> <span class="string">':'</span> {
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">ExpectedColon</span>);
}
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push_key</span>(<span class="ident">s</span>);
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="self">self</span>.<span class="ident">parse_whitespace</span>();
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">parse_value</span>();
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">val</span> {
<span class="ident">Error</span>(_) <span class="op">=></span> <span class="ident">ParseFinished</span>,
<span class="ident">ArrayStart</span> <span class="op">=></span> <span class="ident">ParseArray</span>(<span class="bool-val">true</span>),
<span class="ident">ObjectStart</span> <span class="op">=></span> <span class="ident">ParseObject</span>(<span class="bool-val">true</span>),
_ <span class="op">=></span> <span class="ident">ParseObjectComma</span>,
};
<span class="kw">return</span> <span class="ident">val</span>;
}
<span class="kw">fn</span> <span class="ident">parse_object_end</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">ch_is</span>(<span class="string">'}'</span>) {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">is_empty</span>() {
<span class="ident">ParseBeforeFinish</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">last_is_index</span>() {
<span class="ident">ParseArrayComma</span>
} <span class="kw">else</span> {
<span class="ident">ParseObjectComma</span>
};
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">ObjectEnd</span>
} <span class="kw">else</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() {
<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">EOFWhileParsingObject</span>)
} <span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">InvalidSyntax</span>)
}
}
<span class="kw">fn</span> <span class="ident">parse_value</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">eof</span>() { <span class="kw">return</span> <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">EOFWhileParsingValue</span>); }
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">ch_or_null</span>() {
<span class="string">'n'</span> <span class="op">=></span> { <span class="self">self</span>.<span class="ident">parse_ident</span>(<span class="string">"ull"</span>, <span class="ident">NullValue</span>) }
<span class="string">'t'</span> <span class="op">=></span> { <span class="self">self</span>.<span class="ident">parse_ident</span>(<span class="string">"rue"</span>, <span class="ident">BooleanValue</span>(<span class="bool-val">true</span>)) }
<span class="string">'f'</span> <span class="op">=></span> { <span class="self">self</span>.<span class="ident">parse_ident</span>(<span class="string">"alse"</span>, <span class="ident">BooleanValue</span>(<span class="bool-val">false</span>)) }
<span class="string">'0'</span> ... <span class="string">'9'</span> <span class="op">|</span> <span class="string">'-'</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">parse_number</span>(),
<span class="string">'"'</span> <span class="op">=></span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parse_str</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">StringValue</span>(<span class="ident">s</span>),
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="ident">Error</span>(<span class="ident">e</span>),
},
<span class="string">'['</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">ArrayStart</span>
}
<span class="string">'{'</span> <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">ObjectStart</span>
}
_ <span class="op">=></span> { <span class="self">self</span>.<span class="ident">error_event</span>(<span class="ident">InvalidSyntax</span>) }
}
}
<span class="kw">fn</span> <span class="ident">parse_ident</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">ident</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">value</span>: <span class="ident">JsonEvent</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">if</span> <span class="ident">ident</span>.<span class="ident">chars</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">c</span><span class="op">|</span> <span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="op">==</span> <span class="self">self</span>.<span class="ident">next_char</span>()) {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="ident">value</span>
} <span class="kw">else</span> {
<span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="self">self</span>.<span class="ident">line</span>, <span class="self">self</span>.<span class="ident">col</span>))
}
}
<span class="kw">fn</span> <span class="ident">error_event</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">reason</span>: <span class="ident">ErrorCode</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="self">self</span>.<span class="ident">state</span> <span class="op">=</span> <span class="ident">ParseFinished</span>;
<span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">reason</span>, <span class="self">self</span>.<span class="ident">line</span>, <span class="self">self</span>.<span class="ident">col</span>))
}
}
<span class="doccomment">/// A Builder consumes a json::Parser to create a generic Json structure.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Builder</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">parser</span>: <span class="ident">Parser</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
<span class="ident">token</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">JsonEvent</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">char</span><span class="op">>></span> <span class="ident">Builder</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Create a JSON Builder.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">src</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="ident">Builder</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
<span class="ident">Builder</span> { <span class="ident">parser</span>: <span class="ident">Parser</span>::<span class="ident">new</span>(<span class="ident">src</span>), <span class="ident">token</span>: <span class="prelude-val">None</span>, }
}
<span class="comment">// Decode a Json value from a Parser.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">build</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Json</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">build_value</span>();
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">token</span>.<span class="ident">take</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> {}
<span class="prelude-val">Some</span>(<span class="ident">Error</span>(<span class="ident">e</span>)) <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>); }
_ <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">line</span>, <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">col</span>)); }
}
<span class="ident">result</span>
}
<span class="kw">fn</span> <span class="ident">bump</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="self">self</span>.<span class="ident">token</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">next</span>();
}
<span class="kw">fn</span> <span class="ident">build_value</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Json</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="kw">return</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">token</span>.<span class="ident">take</span>() {
<span class="prelude-val">Some</span>(<span class="ident">NullValue</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">Null</span>),
<span class="prelude-val">Some</span>(<span class="ident">I64Value</span>(<span class="ident">n</span>)) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">n</span>)),
<span class="prelude-val">Some</span>(<span class="ident">U64Value</span>(<span class="ident">n</span>)) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">n</span>)),
<span class="prelude-val">Some</span>(<span class="ident">F64Value</span>(<span class="ident">n</span>)) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">F64</span>(<span class="ident">n</span>)),
<span class="prelude-val">Some</span>(<span class="ident">BooleanValue</span>(<span class="ident">b</span>)) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">Boolean</span>(<span class="ident">b</span>)),
<span class="prelude-val">Some</span>(<span class="ident">StringValue</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">s</span>)) <span class="op">=></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">temp</span> <span class="op">=</span> <span class="ident">string</span>::<span class="ident">String</span>::<span class="ident">new</span>();
<span class="ident">swap</span>(<span class="ident">s</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">temp</span>);
<span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">temp</span>))
}
<span class="prelude-val">Some</span>(<span class="ident">Error</span>(<span class="ident">e</span>)) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">e</span>),
<span class="prelude-val">Some</span>(<span class="ident">ArrayStart</span>) <span class="op">=></span> <span class="self">self</span>.<span class="ident">build_array</span>(),
<span class="prelude-val">Some</span>(<span class="ident">ObjectStart</span>) <span class="op">=></span> <span class="self">self</span>.<span class="ident">build_object</span>(),
<span class="prelude-val">Some</span>(<span class="ident">ObjectEnd</span>) <span class="op">=></span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">error</span>(<span class="ident">InvalidSyntax</span>),
<span class="prelude-val">Some</span>(<span class="ident">ArrayEnd</span>) <span class="op">=></span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">error</span>(<span class="ident">InvalidSyntax</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">error</span>(<span class="ident">EOFWhileParsingValue</span>),
}
}
<span class="kw">fn</span> <span class="ident">build_array</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Json</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">values</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
<span class="kw">loop</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">ArrayEnd</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">token</span> {
<span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">Array</span>(<span class="ident">values</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()));
}
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">build_value</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">values</span>.<span class="ident">push</span>(<span class="ident">v</span>),
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>) }
}
<span class="self">self</span>.<span class="ident">bump</span>();
}
}
<span class="kw">fn</span> <span class="ident">build_object</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Json</span>, <span class="ident">BuilderError</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">bump</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">values</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">token</span>.<span class="ident">take</span>() {
<span class="prelude-val">Some</span>(<span class="ident">ObjectEnd</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="ident">values</span>)); }
<span class="prelude-val">Some</span>(<span class="ident">Error</span>(<span class="ident">e</span>)) <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>); }
<span class="prelude-val">None</span> <span class="op">=></span> { <span class="kw">break</span>; }
<span class="ident">token</span> <span class="op">=></span> { <span class="self">self</span>.<span class="ident">token</span> <span class="op">=</span> <span class="ident">token</span>; }
}
<span class="kw">let</span> <span class="ident">key</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">stack</span>().<span class="ident">top</span>() {
<span class="prelude-val">Some</span>(<span class="ident">StackElement</span>::<span class="ident">Key</span>(<span class="ident">k</span>)) <span class="op">=></span> { <span class="ident">k</span>.<span class="ident">to_string</span>() }
_ <span class="op">=></span> { <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"invalid state"</span>); }
};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">build_value</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">value</span>) <span class="op">=></span> { <span class="ident">values</span>.<span class="ident">insert</span>(<span class="ident">key</span>, <span class="ident">value</span>); }
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>); }
}
<span class="self">self</span>.<span class="ident">bump</span>();
}
<span class="kw">return</span> <span class="self">self</span>.<span class="ident">parser</span>.<span class="ident">error</span>(<span class="ident">EOFWhileParsingObject</span>);
}
}
<span class="doccomment">/// A structure to decode JSON to values in rust.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Decoder</span> {
<span class="ident">stack</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Json</span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">Decoder</span> {
<span class="doccomment">/// Creates a new decoder instance for decoding the specified JSON value.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">json</span>: <span class="ident">Json</span>) <span class="op">-></span> <span class="ident">Decoder</span> {
<span class="ident">Decoder</span> { <span class="ident">stack</span>: <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">json</span>] }
}
}
<span class="kw">impl</span> <span class="ident">Decoder</span> {
<span class="kw">fn</span> <span class="ident">pop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">Json</span><span class="op">></span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">pop</span>() {
<span class="prelude-val">Some</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">EOF</span>),
}
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">expect</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>, <span class="ident">Null</span>) <span class="op">=></span> ({
<span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>) {
<span class="ident">Json</span>::<span class="ident">Null</span> <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="ident">other</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Null"</span>.<span class="ident">to_string</span>(),
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">other</span>)))
}
});
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ident</span>) <span class="op">=></span> ({
<span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>) {
<span class="ident">Json</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">v</span>),
<span class="ident">other</span> <span class="op">=></span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>).<span class="ident">to_string</span>(),
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">other</span>)))
}
}
})
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">read_primitive</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ident</span>) <span class="op">=></span> {
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_comparisons</span>)]</span>
<span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span><span class="op">></span> {
<span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>()) {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">i</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">other</span> <span class="op">=</span> <span class="ident">i</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>;
<span class="kw">if</span> <span class="ident">i</span> <span class="op">==</span> <span class="ident">other</span> <span class="kw">as</span> <span class="ident">i64</span> <span class="op">&&</span> (<span class="ident">other</span> <span class="op">></span> <span class="number">0</span>) <span class="op">==</span> (<span class="ident">i</span> <span class="op">></span> <span class="number">0</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">other</span>)
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="ident">i</span>.<span class="ident">to_string</span>()))
}
}
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">u</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">other</span> <span class="op">=</span> <span class="ident">u</span> <span class="kw">as</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>;
<span class="kw">if</span> <span class="ident">u</span> <span class="op">==</span> <span class="ident">other</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">&&</span> <span class="ident">other</span> <span class="op">>=</span> <span class="number">0</span> {
<span class="prelude-val">Ok</span>(<span class="ident">other</span>)
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="ident">u</span>.<span class="ident">to_string</span>()))
}
}
<span class="ident">Json</span>::<span class="ident">F64</span>(<span class="ident">f</span>) <span class="op">=></span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Integer"</span>.<span class="ident">to_string</span>(), <span class="ident">f</span>.<span class="ident">to_string</span>()))
}
<span class="comment">// re: #12967.. a type w/ numeric keys (ie HashMap<usize, V> etc)</span>
<span class="comment">// is going to have a string here, as per JSON spec.</span>
<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="kw">match</span> <span class="ident">s</span>.<span class="ident">parse</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f</span>),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="ident">s</span>)),
},
<span class="ident">value</span> <span class="op">=></span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="ident">value</span>.<span class="ident">to_string</span>()))
}
}
}
}
}
<span class="kw">impl</span> ::<span class="ident">Decoder</span> <span class="kw">for</span> <span class="ident">Decoder</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">DecoderError</span>;
<span class="kw">fn</span> <span class="ident">read_nil</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span>()<span class="op">></span> {
<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">Null</span>)
}
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_usize</span>, <span class="ident">usize</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_u8</span>, <span class="ident">u8</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_u16</span>, <span class="ident">u16</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_u32</span>, <span class="ident">u32</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_u64</span>, <span class="ident">u64</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_isize</span>, <span class="ident">isize</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_i8</span>, <span class="ident">i8</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_i16</span>, <span class="ident">i16</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_i32</span>, <span class="ident">i32</span> }
<span class="macro">read_primitive</span><span class="macro">!</span> { <span class="ident">read_i64</span>, <span class="ident">i64</span> }
<span class="kw">fn</span> <span class="ident">read_f32</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">f32</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">read_f64</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="kw">as</span> <span class="ident">f32</span>)
}
<span class="kw">fn</span> <span class="ident">read_f64</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> {
<span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>()) {
<span class="ident">Json</span>::<span class="ident">I64</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f</span> <span class="kw">as</span> <span class="ident">f64</span>),
<span class="ident">Json</span>::<span class="ident">U64</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f</span> <span class="kw">as</span> <span class="ident">f64</span>),
<span class="ident">Json</span>::<span class="ident">F64</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f</span>),
<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">s</span>) <span class="op">=></span> {
<span class="comment">// re: #12967.. a type w/ numeric keys (ie HashMap<usize, V> etc)</span>
<span class="comment">// is going to have a string here, as per JSON spec.</span>
<span class="kw">match</span> <span class="ident">s</span>.<span class="ident">parse</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">f</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f</span>),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="ident">s</span>)),
}
},
<span class="ident">Json</span>::<span class="ident">Null</span> <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="ident">f64</span>::<span class="ident">NAN</span>),
<span class="ident">value</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">value</span>)))
}
}
<span class="kw">fn</span> <span class="ident">read_bool</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> {
<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">Boolean</span>)
}
<span class="kw">fn</span> <span class="ident">read_char</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">char</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">read_str</span>());
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">chars</span>();
<span class="kw">match</span> (<span class="ident">it</span>.<span class="ident">next</span>(), <span class="ident">it</span>.<span class="ident">next</span>()) {
<span class="comment">// exactly one character</span>
(<span class="prelude-val">Some</span>(<span class="ident">c</span>), <span class="prelude-val">None</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">c</span>),
_ <span class="op">=></span> ()
}
}
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"single character string"</span>.<span class="ident">to_string</span>(), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">s</span>)))
}
<span class="kw">fn</span> <span class="ident">read_str</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span> {
<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">String</span>)
}
<span class="kw">fn</span> <span class="ident">read_enum</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_name</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">read_enum_variant</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">names</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>],
<span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>, <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>()) {
<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">s</span>,
<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="kw-2">mut</span> <span class="ident">o</span>) <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">o</span>.<span class="ident">remove</span>(<span class="kw-2">&</span><span class="string">"variant"</span>.<span class="ident">to_string</span>()) {
<span class="prelude-val">Some</span>(<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">s</span>)) <span class="op">=></span> <span class="ident">s</span>,
<span class="prelude-val">Some</span>(<span class="ident">val</span>) <span class="op">=></span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"String"</span>.<span class="ident">to_string</span>(), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">val</span>)))
}
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">MissingFieldError</span>(<span class="string">"variant"</span>.<span class="ident">to_string</span>()))
}
};
<span class="kw">match</span> <span class="ident">o</span>.<span class="ident">remove</span>(<span class="kw-2">&</span><span class="string">"fields"</span>.<span class="ident">to_string</span>()) {
<span class="prelude-val">Some</span>(<span class="ident">Json</span>::<span class="ident">Array</span>(<span class="ident">l</span>)) <span class="op">=></span> {
<span class="kw">for</span> <span class="ident">field</span> <span class="kw">in</span> <span class="ident">l</span>.<span class="ident">into_iter</span>().<span class="ident">rev</span>() {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">field</span>);
}
},
<span class="prelude-val">Some</span>(<span class="ident">val</span>) <span class="op">=></span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Array"</span>.<span class="ident">to_string</span>(), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">val</span>)))
}
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">MissingFieldError</span>(<span class="string">"fields"</span>.<span class="ident">to_string</span>()))
}
}
<span class="ident">n</span>
}
<span class="ident">json</span> <span class="op">=></span> {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"String or Object"</span>.<span class="ident">to_string</span>(), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">json</span>)))
}
};
<span class="kw">let</span> <span class="ident">idx</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">names</span>.<span class="ident">iter</span>().<span class="ident">position</span>(<span class="op">|</span><span class="ident">n</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">n</span> <span class="op">==</span> <span class="ident">name</span>) {
<span class="prelude-val">Some</span>(<span class="ident">idx</span>) <span class="op">=></span> <span class="ident">idx</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">UnknownVariantError</span>(<span class="ident">name</span>))
};
<span class="ident">f</span>(<span class="self">self</span>, <span class="ident">idx</span>)
}
<span class="kw">fn</span> <span class="ident">read_enum_variant_arg</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">read_enum_struct_variant</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">names</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>], <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>, <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_enum_variant</span>(<span class="ident">names</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">read_enum_struct_variant_field</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">_name</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">idx</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>)
<span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_enum_variant_arg</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">read_struct</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_name</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">_len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>));
<span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>());
<span class="prelude-val">Ok</span>(<span class="ident">value</span>)
}
<span class="kw">fn</span> <span class="ident">read_struct_field</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">_idx</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>)
<span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">obj</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">Object</span>));
<span class="kw">let</span> <span class="ident">value</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">obj</span>.<span class="ident">remove</span>(<span class="kw-2">&</span><span class="ident">name</span>.<span class="ident">to_string</span>()) {
<span class="prelude-val">None</span> <span class="op">=></span> {
<span class="comment">// Add a Null and try to parse it as an Option<_></span>
<span class="comment">// to get None as a default value.</span>
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">Json</span>::<span class="ident">Null</span>);
<span class="kw">match</span> <span class="ident">f</span>(<span class="self">self</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">x</span>) <span class="op">=></span> <span class="ident">x</span>,
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">MissingFieldError</span>(<span class="ident">name</span>.<span class="ident">to_string</span>())),
}
},
<span class="prelude-val">Some</span>(<span class="ident">json</span>) <span class="op">=></span> {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">json</span>);
<span class="macro">try</span><span class="macro">!</span>(<span class="ident">f</span>(<span class="self">self</span>))
}
};
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="ident">obj</span>));
<span class="prelude-val">Ok</span>(<span class="ident">value</span>)
}
<span class="kw">fn</span> <span class="ident">read_tuple</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">tuple_len</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_seq</span>(<span class="kw">move</span> <span class="op">|</span><span class="ident">d</span>, <span class="ident">len</span><span class="op">|</span> {
<span class="kw">if</span> <span class="ident">len</span> <span class="op">==</span> <span class="ident">tuple_len</span> {
<span class="ident">f</span>(<span class="ident">d</span>)
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"Tuple{}"</span>, <span class="ident">tuple_len</span>), <span class="macro">format</span><span class="macro">!</span>(<span class="string">"Tuple{}"</span>, <span class="ident">len</span>)))
}
})
}
<span class="kw">fn</span> <span class="ident">read_tuple_arg</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_seq_elt</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">read_tuple_struct</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">_name</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">len</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>)
<span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_tuple</span>(<span class="ident">len</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">read_tuple_struct_arg</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>,
<span class="ident">idx</span>: <span class="ident">usize</span>,
<span class="ident">f</span>: <span class="ident">F</span>)
<span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">read_tuple_arg</span>(<span class="ident">idx</span>, <span class="ident">f</span>)
}
<span class="kw">fn</span> <span class="ident">read_option</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>, <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">match</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>()) {
<span class="ident">Json</span>::<span class="ident">Null</span> <span class="op">=></span> <span class="ident">f</span>(<span class="self">self</span>, <span class="bool-val">false</span>),
<span class="ident">value</span> <span class="op">=></span> { <span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">value</span>); <span class="ident">f</span>(<span class="self">self</span>, <span class="bool-val">true</span>) }
}
}
<span class="kw">fn</span> <span class="ident">read_seq</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>, <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">array</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">Array</span>));
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">array</span>.<span class="ident">len</span>();
<span class="kw">for</span> <span class="ident">v</span> <span class="kw">in</span> <span class="ident">array</span>.<span class="ident">into_iter</span>().<span class="ident">rev</span>() {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">v</span>);
}
<span class="ident">f</span>(<span class="self">self</span>, <span class="ident">len</span>)
}
<span class="kw">fn</span> <span class="ident">read_seq_elt</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">read_map</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>, <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">obj</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="macro">expect</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">pop</span>(), <span class="ident">Object</span>));
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">obj</span>.<span class="ident">len</span>();
<span class="kw">for</span> (<span class="ident">key</span>, <span class="ident">value</span>) <span class="kw">in</span> <span class="ident">obj</span>.<span class="ident">into_iter</span>() {
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">value</span>);
<span class="self">self</span>.<span class="ident">stack</span>.<span class="ident">push</span>(<span class="ident">Json</span>::<span class="ident">String</span>(<span class="ident">key</span>));
}
<span class="ident">f</span>(<span class="self">self</span>, <span class="ident">len</span>)
}
<span class="kw">fn</span> <span class="ident">read_map_elt_key</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">read_map_elt_val</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">_idx</span>: <span class="ident">usize</span>, <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>) <span class="op">-></span> <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
{
<span class="ident">f</span>(<span class="self">self</span>)
}
<span class="kw">fn</span> <span class="ident">error</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">err</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">DecoderError</span> {
<span class="ident">ApplicationError</span>(<span class="ident">err</span>.<span class="ident">to_string</span>())
}
}
<span class="doccomment">/// A trait for converting values to JSON</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">ToJson</span> {
<span class="doccomment">/// Converts the value of `self` to an instance of JSON</span>
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span>;
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">to_json_impl_i64</span> {
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>), <span class="op">+</span>) <span class="op">=></span> (
$(<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">I64</span>(<span class="kw-2">*</span><span class="self">self</span> <span class="kw">as</span> <span class="ident">i64</span>) }
})<span class="op">+</span>
)
}
<span class="macro">to_json_impl_i64</span><span class="macro">!</span> { <span class="ident">isize</span>, <span class="ident">i8</span>, <span class="ident">i16</span>, <span class="ident">i32</span>, <span class="ident">i64</span> }
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">to_json_impl_u64</span> {
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">ty</span>), <span class="op">+</span>) <span class="op">=></span> (
$(<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">U64</span>(<span class="kw-2">*</span><span class="self">self</span> <span class="kw">as</span> <span class="ident">u64</span>) }
})<span class="op">+</span>
)
}
<span class="macro">to_json_impl_u64</span><span class="macro">!</span> { <span class="ident">usize</span>, <span class="ident">u8</span>, <span class="ident">u16</span>, <span class="ident">u32</span>, <span class="ident">u64</span> }
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="self">self</span>.<span class="ident">clone</span>() }
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">f32</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { (<span class="kw-2">*</span><span class="self">self</span> <span class="kw">as</span> <span class="ident">f64</span>).<span class="ident">to_json</span>() }
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">f64</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">num</span>::<span class="ident">FpCategory</span>::{<span class="ident">Nan</span>, <span class="ident">Infinite</span>};
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">classify</span>() {
<span class="ident">Nan</span> <span class="op">|</span> <span class="ident">Infinite</span> <span class="op">=></span> <span class="ident">Json</span>::<span class="ident">Null</span>,
_ <span class="op">=></span> <span class="ident">Json</span>::<span class="ident">F64</span>(<span class="kw-2">*</span><span class="self">self</span>)
}
}
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> () {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">Null</span> }
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">bool</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">Boolean</span>(<span class="kw-2">*</span><span class="self">self</span>) }
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">str</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">String</span>(<span class="self">self</span>.<span class="ident">to_string</span>()) }
}
<span class="kw">impl</span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">string</span>::<span class="ident">String</span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">String</span>((<span class="kw-2">*</span><span class="self">self</span>).<span class="ident">clone</span>()) }
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">tuple_impl</span> {
<span class="comment">// use variables to indicate the arity of the tuple</span>
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tyvar</span>:<span class="ident">ident</span>),<span class="op">*</span> ) <span class="op">=></span> {
<span class="comment">// the trailing commas are for the 1 tuple</span>
<span class="kw">impl</span><span class="op"><</span>
$( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tyvar</span> : <span class="ident">ToJson</span> ),<span class="op">*</span>
<span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> ( $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tyvar</span> ),<span class="op">*</span> , ) {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span>
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
($(<span class="kw-2">ref</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tyvar</span>),<span class="kw-2">*</span>,) <span class="op">=></span> <span class="ident">Json</span>::<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tyvar</span>.<span class="ident">to_json</span>()),<span class="kw-2">*</span>])
}
}
}
}
}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>, <span class="ident">J</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>, <span class="ident">J</span>, <span class="ident">K</span>}
<span class="macro">tuple_impl</span><span class="macro">!</span>{<span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>, <span class="ident">J</span>, <span class="ident">K</span>, <span class="ident">L</span>}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToJson</span><span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> [<span class="ident">A</span>] {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">Array</span>(<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">elt</span><span class="op">|</span> <span class="ident">elt</span>.<span class="ident">to_json</span>()).<span class="ident">collect</span>()) }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToJson</span><span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> { <span class="ident">Json</span>::<span class="ident">Array</span>(<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">elt</span><span class="op">|</span> <span class="ident">elt</span>.<span class="ident">to_json</span>()).<span class="ident">collect</span>()) }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToJson</span><span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">BTreeMap</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">d</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="kw">for</span> (<span class="ident">key</span>, <span class="ident">value</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">iter</span>() {
<span class="ident">d</span>.<span class="ident">insert</span>((<span class="kw-2">*</span><span class="ident">key</span>).<span class="ident">clone</span>(), <span class="ident">value</span>.<span class="ident">to_json</span>());
}
<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="ident">d</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToJson</span><span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="ident">HashMap</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">d</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="kw">for</span> (<span class="ident">key</span>, <span class="ident">value</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">iter</span>() {
<span class="ident">d</span>.<span class="ident">insert</span>((<span class="kw-2">*</span><span class="ident">key</span>).<span class="ident">clone</span>(), <span class="ident">value</span>.<span class="ident">to_json</span>());
}
<span class="ident">Json</span>::<span class="ident">Object</span>(<span class="ident">d</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>:<span class="ident">ToJson</span><span class="op">></span> <span class="ident">ToJson</span> <span class="kw">for</span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">to_json</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="ident">Json</span>::<span class="ident">Null</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">value</span>) <span class="op">=></span> <span class="ident">value</span>.<span class="ident">to_json</span>()
}
}
}
<span class="kw">struct</span> <span class="ident">FormatShim</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>: <span class="lifetime">'a</span><span class="op">></span> {
<span class="ident">inner</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span><span class="op"><</span><span class="lifetime">'b</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Write</span> <span class="kw">for</span> <span class="ident">FormatShim</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">write_str</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">write_str</span>(<span class="ident">s</span>) {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>)
}
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="doccomment">/// Encodes a json value into a string</span>
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">shim</span> <span class="op">=</span> <span class="ident">FormatShim</span> { <span class="ident">inner</span>: <span class="ident">f</span> };
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">shim</span>);
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>) {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>)
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">PrettyJson</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="doccomment">/// Encodes a json value into a string</span>
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">shim</span> <span class="op">=</span> <span class="ident">FormatShim</span> { <span class="ident">inner</span>: <span class="ident">f</span> };
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new_pretty</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">shim</span>);
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>) {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>)
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Encodable</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">AsJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Encodes a json value into a string</span>
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">shim</span> <span class="op">=</span> <span class="ident">FormatShim</span> { <span class="ident">inner</span>: <span class="ident">f</span> };
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">shim</span>);
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>) {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>)
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">AsPrettyJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Set the indentation level for the emitted JSON</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">indent</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">indent</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">AsPrettyJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">indent</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">indent</span>);
<span class="self">self</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="ident">Encodable</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">AsPrettyJson</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> {
<span class="doccomment">/// Encodes a json value into a string</span>
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">shim</span> <span class="op">=</span> <span class="ident">FormatShim</span> { <span class="ident">inner</span>: <span class="ident">f</span> };
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new_pretty</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">shim</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">n</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">indent</span> {
<span class="comment">// unwrap cannot panic for pretty encoders</span>
<span class="kw">let</span> _ <span class="op">=</span> <span class="ident">encoder</span>.<span class="ident">set_indent</span>(<span class="ident">n</span>);
}
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>) {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="prelude-val">Ok</span>(()),
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">fmt</span>::<span class="ident">Error</span>)
}
}
}
<span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">Json</span> {
<span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">ParserError</span>;
<span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Json</span>, <span class="ident">ParserError</span><span class="op">></span> {
<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="ident">s</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="self">self</span>::<span class="ident">Animal</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> {<span class="ident">Encodable</span>, <span class="ident">Decodable</span>};
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Json</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">ErrorCode</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">ParserError</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">DecoderError</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">JsonEvent</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">StackElement</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">Json</span>, <span class="ident">DecodeResult</span>, <span class="ident">DecoderError</span>, <span class="ident">JsonEvent</span>, <span class="ident">Parser</span>,
<span class="ident">StackElement</span>, <span class="ident">Stack</span>, <span class="ident">Decoder</span>, <span class="ident">Encoder</span>, <span class="ident">EncoderError</span>};
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">i64</span>, <span class="ident">u64</span>, <span class="ident">f32</span>, <span class="ident">f64</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">BTreeMap</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">string</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">RustcDecodable</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">struct</span> <span class="ident">OptionData</span> {
<span class="ident">opt</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_option_none</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span><span class="string">"{}"</span>;
<span class="kw">let</span> <span class="ident">obj</span>: <span class="ident">OptionData</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">obj</span>, <span class="ident">OptionData</span> { <span class="ident">opt</span>: <span class="prelude-val">None</span> });
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_option_some</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"{ \"opt\": 10 }"</span>;
<span class="kw">let</span> <span class="ident">obj</span>: <span class="ident">OptionData</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">obj</span>, <span class="ident">OptionData</span> { <span class="ident">opt</span>: <span class="prelude-val">Some</span>(<span class="number">10</span>) });
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_option_malformed</span>() {
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">OptionData</span><span class="op">></span>(<span class="string">"{ \"opt\": [] }"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="string">"[]"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">OptionData</span><span class="op">></span>(<span class="string">"{ \"opt\": false }"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="string">"false"</span>.<span class="ident">to_string</span>()));
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">RustcEncodable</span>, <span class="ident">RustcDecodable</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">enum</span> <span class="ident">Animal</span> {
<span class="ident">Dog</span>,
<span class="ident">Frog</span>(<span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">isize</span>)
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">RustcEncodable</span>, <span class="ident">RustcDecodable</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">struct</span> <span class="ident">Inner</span> {
<span class="ident">a</span>: (),
<span class="ident">b</span>: <span class="ident">usize</span>,
<span class="ident">c</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span>,
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">RustcEncodable</span>, <span class="ident">RustcDecodable</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">struct</span> <span class="ident">Outer</span> {
<span class="ident">inner</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Inner</span><span class="op">></span>,
}
<span class="kw">fn</span> <span class="ident">mk_object</span>(<span class="ident">items</span>: <span class="kw-2">&</span>[(<span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">Json</span>)]) <span class="op">-></span> <span class="ident">Json</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">d</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="kw">for</span> <span class="ident">item</span> <span class="kw">in</span> <span class="ident">items</span>.<span class="ident">iter</span>() {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">item</span> {
(<span class="kw-2">ref</span> <span class="ident">key</span>, <span class="kw-2">ref</span> <span class="ident">value</span>) <span class="op">=></span> { <span class="ident">d</span>.<span class="ident">insert</span>((<span class="kw-2">*</span><span class="ident">key</span>).<span class="ident">clone</span>(), (<span class="kw-2">*</span><span class="ident">value</span>).<span class="ident">clone</span>()); },
}
};
<span class="ident">Object</span>(<span class="ident">d</span>)
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_str_trait</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"null"</span>;
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">Json</span><span class="op">></span>().<span class="ident">unwrap</span>() <span class="op">==</span> <span class="ident">s</span>.<span class="ident">parse</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_null</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Null</span>.<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Null</span>.<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"null"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_i64</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">0</span>).<span class="ident">to_string</span>(), <span class="string">"0"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">0</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"0"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">1234</span>).<span class="ident">to_string</span>(), <span class="string">"1234"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">1234</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"1234"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">I64</span>(<span class="op">-</span><span class="number">5678</span>).<span class="ident">to_string</span>(), <span class="string">"-5678"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">I64</span>(<span class="op">-</span><span class="number">5678</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"-5678"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">7650007200025252000</span>).<span class="ident">to_string</span>(), <span class="string">"7650007200025252000"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">U64</span>(<span class="number">7650007200025252000</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"7650007200025252000"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_f64</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">3.0</span>).<span class="ident">to_string</span>(), <span class="string">"3.0"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">3.0</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"3.0"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">3.1</span>).<span class="ident">to_string</span>(), <span class="string">"3.1"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">3.1</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"3.1"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="op">-</span><span class="number">1.5</span>).<span class="ident">to_string</span>(), <span class="string">"-1.5"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="op">-</span><span class="number">1.5</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"-1.5"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">0.5</span>).<span class="ident">to_string</span>(), <span class="string">"0.5"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="number">0.5</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"0.5"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">NAN</span>).<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">NAN</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">INFINITY</span>).<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">INFINITY</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">NEG_INFINITY</span>).<span class="ident">to_string</span>(), <span class="string">"null"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">F64</span>(<span class="ident">f64</span>::<span class="ident">NEG_INFINITY</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"null"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_str</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">String</span>(<span class="string">""</span>.<span class="ident">to_string</span>()).<span class="ident">to_string</span>(), <span class="string">"\"\""</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">String</span>(<span class="string">""</span>.<span class="ident">to_string</span>()).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"\"\""</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">String</span>(<span class="string">"homura"</span>.<span class="ident">to_string</span>()).<span class="ident">to_string</span>(), <span class="string">"\"homura\""</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">String</span>(<span class="string">"madoka"</span>.<span class="ident">to_string</span>()).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"\"madoka\""</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_bool</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Boolean</span>(<span class="bool-val">true</span>).<span class="ident">to_string</span>(), <span class="string">"true"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Boolean</span>(<span class="bool-val">true</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"true"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Boolean</span>(<span class="bool-val">false</span>).<span class="ident">to_string</span>(), <span class="string">"false"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Boolean</span>(<span class="bool-val">false</span>).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"false"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_array</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[]).<span class="ident">to_string</span>(), <span class="string">"[]"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[]).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"[]"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Boolean</span>(<span class="bool-val">true</span>)]).<span class="ident">to_string</span>(), <span class="string">"[true]"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Boolean</span>(<span class="bool-val">true</span>)]).<span class="ident">pretty</span>().<span class="ident">to_string</span>(),
<span class="string">"\
[\n \
true\n\
]"</span>
);
<span class="kw">let</span> <span class="ident">long_test_array</span> <span class="op">=</span> <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[
<span class="ident">Boolean</span>(<span class="bool-val">false</span>),
<span class="ident">Null</span>,
<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">String</span>(<span class="string">"foo\nbar"</span>.<span class="ident">to_string</span>()), <span class="ident">F64</span>(<span class="number">3.5</span>)])]);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">long_test_array</span>.<span class="ident">to_string</span>(),
<span class="string">"[false,null,[\"foo\\nbar\",3.5]]"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">long_test_array</span>.<span class="ident">pretty</span>().<span class="ident">to_string</span>(),
<span class="string">"\
[\n \
false,\n \
null,\n \
[\n \
\"foo\\nbar\",\n \
3.5\n \
]\n\
]"</span>
);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_object</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">mk_object</span>(<span class="kw-2">&</span>[]).<span class="ident">to_string</span>(), <span class="string">"{}"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">mk_object</span>(<span class="kw-2">&</span>[]).<span class="ident">pretty</span>().<span class="ident">to_string</span>(), <span class="string">"{}"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>))
]).<span class="ident">to_string</span>(),
<span class="string">"{\"a\":true}"</span>
);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>))]).<span class="ident">pretty</span>().<span class="ident">to_string</span>(),
<span class="string">"\
{\n \
\"a\": true\n\
}"</span>
);
<span class="kw">let</span> <span class="ident">complex_obj</span> <span class="op">=</span> <span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"c"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">"\x0c\r"</span>.<span class="ident">to_string</span>()))]),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"d"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">""</span>.<span class="ident">to_string</span>()))])
]))
]);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">complex_obj</span>.<span class="ident">to_string</span>(),
<span class="string">"{\
\"b\":[\
{\"c\":\"\\f\\r\"},\
{\"d\":\"\"}\
]\
}"</span>
);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">complex_obj</span>.<span class="ident">pretty</span>().<span class="ident">to_string</span>(),
<span class="string">"\
{\n \
\"b\": [\n \
{\n \
\"c\": \"\\f\\r\"\n \
},\n \
{\n \
\"d\": \"\"\n \
}\n \
]\n\
}"</span>
);
<span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>)),
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"c"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">"\x0c\r"</span>.<span class="ident">to_string</span>()))]),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"d"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">""</span>.<span class="ident">to_string</span>()))])
]))
]);
<span class="comment">// We can't compare the strings directly because the object fields be</span>
<span class="comment">// printed in a different order.</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">clone</span>(), <span class="ident">a</span>.<span class="ident">to_string</span>().<span class="ident">parse</span>().<span class="ident">unwrap</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">clone</span>(), <span class="ident">a</span>.<span class="ident">pretty</span>().<span class="ident">to_string</span>().<span class="ident">parse</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_enum</span>() {
<span class="kw">let</span> <span class="ident">animal</span> <span class="op">=</span> <span class="ident">Dog</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_json</span>(<span class="kw-2">&</span><span class="ident">animal</span>)),
<span class="string">"\"Dog\""</span>
);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="ident">animal</span>)),
<span class="string">"\"Dog\""</span>
);
<span class="kw">let</span> <span class="ident">animal</span> <span class="op">=</span> <span class="ident">Frog</span>(<span class="string">"Henry"</span>.<span class="ident">to_string</span>(), <span class="number">349</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_json</span>(<span class="kw-2">&</span><span class="ident">animal</span>)),
<span class="string">"{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}"</span>
);
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="ident">animal</span>)),
<span class="string">"{\n \
\"variant\": \"Frog\",\n \
\"fields\": [\n \
\"Henry\",\n \
349\n \
]\n\
}"</span>
);
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">check_encoder_for_simple</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>:<span class="ident">expr</span>) <span class="op">=></span> ({
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_json</span>(<span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>);
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>);
})
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_some</span>() {
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="string">"jodhpurs"</span>.<span class="ident">to_string</span>()), <span class="string">"\"jodhpurs\""</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_none</span>() {
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="prelude-val">None</span>::<span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span>, <span class="string">"null"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_write_char</span>() {
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'a'</span>, <span class="string">"\"a\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\t'</span>, <span class="string">"\"\\t\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{0000}'</span>, <span class="string">"\"\\u0000\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{001b}'</span>, <span class="string">"\"\\u001b\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{007f}'</span>, <span class="string">"\"\\u007f\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{00a0}'</span>, <span class="string">"\"\u{00a0}\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{abcd}'</span>, <span class="string">"\"\u{abcd}\""</span>);
<span class="macro">check_encoder_for_simple</span><span class="macro">!</span>(<span class="string">'\u{10ffff}'</span>, <span class="string">"\"\u{10ffff}\""</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_trailing_characters</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"nulla"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"truea"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"falsea"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"1a"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[]a"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{}a"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">3</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_identifiers</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"n"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"nul"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"t"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"truz"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"f"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"faz"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"null"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Null</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"true"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Boolean</span>(<span class="bool-val">true</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"false"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Boolean</span>(<span class="bool-val">false</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">" null "</span>), <span class="prelude-val">Ok</span>(<span class="ident">Null</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">" true "</span>), <span class="prelude-val">Ok</span>(<span class="ident">Boolean</span>(<span class="bool-val">true</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">" false "</span>), <span class="prelude-val">Ok</span>(<span class="ident">Boolean</span>(<span class="bool-val">false</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_identifiers</span>() {
<span class="kw">let</span> <span class="ident">v</span>: () <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"null"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, ());
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">bool</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"true"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="bool-val">true</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">bool</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"false"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="bool-val">false</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_number</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"+"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"."</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"NaN"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"00"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"1."</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"1e"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"1e+"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"18446744073709551616"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">20</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"18446744073709551617"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">20</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-9223372036854775809"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidNumber</span>, <span class="number">1</span>, <span class="number">21</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"3"</span>), <span class="prelude-val">Ok</span>(<span class="ident">U64</span>(<span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"3.1"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">3.1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-1.2"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="op">-</span><span class="number">1.2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"0.4"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">0.4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"0.4e5"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">0.4e5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"0.4e+15"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">0.4e15</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"0.4e-01"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">0.4e-01</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"123456789.5024"</span>), <span class="prelude-val">Ok</span>(<span class="ident">F64</span>(<span class="number">123456789.5024</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">" 3 "</span>), <span class="prelude-val">Ok</span>(<span class="ident">U64</span>(<span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-9223372036854775808"</span>), <span class="prelude-val">Ok</span>(<span class="ident">I64</span>(<span class="ident">i64</span>::<span class="ident">MIN</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"9223372036854775807"</span>), <span class="prelude-val">Ok</span>(<span class="ident">U64</span>(<span class="ident">i64</span>::<span class="ident">MAX</span> <span class="kw">as</span> <span class="ident">u64</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"18446744073709551615"</span>), <span class="prelude-val">Ok</span>(<span class="ident">U64</span>(<span class="ident">u64</span>::<span class="ident">MAX</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_numbers</span>() {
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"3"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">3.0</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"3.1"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">3.1</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"-1.2"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="op">-</span><span class="number">1.2</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"0.4"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">0.4</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"0.4e5"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">0.4e5</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"0.4e15"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">0.4e15</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"0.4e-01"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">0.4e-01</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"123456789.5024"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">123456789.5024</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"0"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="number">0</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"18446744073709551615"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">u64</span>::<span class="ident">MAX</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">i64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"-9223372036854775808"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">i64</span>::<span class="ident">MIN</span>);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">i64</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"9223372036854775807"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">i64</span>::<span class="ident">MAX</span>);
<span class="kw">let</span> <span class="ident">res</span>: <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">i64</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"765.25252"</span>);
<span class="kw">match</span> <span class="ident">res</span> {
<span class="prelude-val">Ok</span>(..) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"expected an error"</span>),
<span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="kw-2">ref</span> <span class="ident">s</span>, _)) <span class="op">=></span> <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="string">"Integer"</span>),
<span class="prelude-val">Err</span>(..) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"expected an 'expected integer' error"</span>),
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_str</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"lol"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingString</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\n\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">ControlCharacterInString</span>, <span class="number">2</span>, <span class="number">1</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\0\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">ControlCharacterInString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\u{1}\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">ControlCharacterInString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\u{1F}\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">ControlCharacterInString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="comment">// Only C0 control characters are excluded.</span>
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">'\u{7F}'</span>.<span class="ident">is_control</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">'\u{80}'</span>.<span class="ident">is_control</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">'\u{9F}'</span>.<span class="ident">is_control</span>());
<span class="kw">let</span> <span class="ident">c1_controls</span> <span class="op">=</span> <span class="string">"\u{7F}\u{80}\u{9F}"</span>.<span class="ident">to_string</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"\"{}\""</span>, <span class="ident">c1_controls</span>)), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="ident">c1_controls</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">""</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"foo\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"foo"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\\"\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\""</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\b\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\x08"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\n\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\n"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\r\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\r"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\t\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\t"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">" \"foo\" "</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"foo"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\u12ab\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\u{12ab}"</span>.<span class="ident">to_string</span>())));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"\\uAB12\""</span>), <span class="prelude-val">Ok</span>(<span class="ident">String</span>(<span class="string">"\u{AB12}"</span>.<span class="ident">to_string</span>())));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_str</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> [(<span class="string">"\"\""</span>, <span class="string">""</span>),
(<span class="string">"\"foo\""</span>, <span class="string">"foo"</span>),
(<span class="string">"\"\\\"\""</span>, <span class="string">"\""</span>),
(<span class="string">"\"\\b\""</span>, <span class="string">"\x08"</span>),
(<span class="string">"\"\\n\""</span>, <span class="string">"\n"</span>),
(<span class="string">"\"\\r\""</span>, <span class="string">"\r"</span>),
(<span class="string">"\"\\t\""</span>, <span class="string">"\t"</span>),
(<span class="string">"\"\\u12ab\""</span>, <span class="string">"\u{12ab}"</span>),
(<span class="string">"\"\\uAB12\""</span>, <span class="string">"\u{AB12}"</span>)];
<span class="kw">for</span> <span class="kw-2">&</span>(<span class="ident">i</span>, <span class="ident">o</span>) <span class="kw">in</span> <span class="ident">s</span>.<span class="ident">iter</span>() {
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">string</span>::<span class="ident">String</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">i</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">o</span>);
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_array</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"["</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingArray</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1,"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1,]"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[6 7]"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[]"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[ ]"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[true]"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Boolean</span>(<span class="bool-val">true</span>)])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[ false ]"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Boolean</span>(<span class="bool-val">false</span>)])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[null]"</span>), <span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Null</span>])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[3, 1]"</span>),
<span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">U64</span>(<span class="number">3</span>), <span class="ident">U64</span>(<span class="number">1</span>)])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\n[3, 2]\n"</span>),
<span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">U64</span>(<span class="number">3</span>), <span class="ident">U64</span>(<span class="number">2</span>)])));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[2, [4, 1]]"</span>),
<span class="prelude-val">Ok</span>(<span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">U64</span>(<span class="number">2</span>), <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">U64</span>(<span class="number">4</span>), <span class="ident">U64</span>(<span class="number">1</span>)])])));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_array</span>() {
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span>()<span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[]);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span>()<span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[null]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[()]);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[true]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="bool-val">true</span>]);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">isize</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[3, 1]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">3</span>, <span class="number">1</span>]);
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">usize</span><span class="op">>></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[[3], [1, 2]]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="macro">vec</span><span class="macro">!</span>[<span class="number">3</span>], <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>]]);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_tuple</span>() {
<span class="kw">let</span> <span class="ident">t</span>: (<span class="ident">usize</span>, <span class="ident">usize</span>, <span class="ident">usize</span>) <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[1, 2, 3]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">t</span>, (<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>));
<span class="kw">let</span> <span class="ident">t</span>: (<span class="ident">usize</span>, <span class="ident">string</span>::<span class="ident">String</span>) <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"[1, \"two\"]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">t</span>, (<span class="number">1</span>, <span class="string">"two"</span>.<span class="ident">to_string</span>()));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_tuple_malformed_types</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="kw">super</span>::<span class="ident">decode</span>::<span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">string</span>::<span class="ident">String</span>)<span class="op">></span>(<span class="string">"[1, 2]"</span>).<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_tuple_malformed_length</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="kw">super</span>::<span class="ident">decode</span>::<span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">></span>(<span class="string">"[1, 2, 3]"</span>).<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_object</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{ "</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">KeyMustBeAString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{ \"a\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\""</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\" "</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\" 1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">ExpectedColon</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\":"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\":1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">7</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\":1 1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">8</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\":1,"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">8</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{}"</span>).<span class="ident">unwrap</span>(), <span class="ident">mk_object</span>(<span class="kw-2">&</span>[]));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"a\": 3}"</span>).<span class="ident">unwrap</span>(),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">U64</span>(<span class="number">3</span>))]));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(
<span class="string">"{ \"a\": null, \"b\" : true }"</span>).<span class="ident">unwrap</span>(),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">Null</span>),
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>))]));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\n{ \"a\": null, \"b\" : true }\n"</span>).<span class="ident">unwrap</span>(),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">Null</span>),
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>))]));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(
<span class="string">"{\"a\" : 1.0 ,\"b\": [ true ]}"</span>).<span class="ident">unwrap</span>(),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">F64</span>(<span class="number">1.0</span>)),
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Boolean</span>(<span class="bool-val">true</span>)]))
]));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(
<span class="string">"{\
\"a\": 1.0, \
\"b\": [\
true,\
\"foo\\nbar\", \
{ \"c\": {\"d\": null} } \
]\
}"</span>).<span class="ident">unwrap</span>(),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">F64</span>(<span class="number">1.0</span>)),
(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>[
<span class="ident">Boolean</span>(<span class="bool-val">true</span>),
<span class="ident">String</span>(<span class="string">"foo\nbar"</span>.<span class="ident">to_string</span>()),
<span class="ident">mk_object</span>(<span class="kw-2">&</span>[
(<span class="string">"c"</span>.<span class="ident">to_string</span>(), <span class="ident">mk_object</span>(<span class="kw-2">&</span>[(<span class="string">"d"</span>.<span class="ident">to_string</span>(), <span class="ident">Null</span>)]))
])
]))
]));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_struct</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"{
\"inner\": [
{ \"a\": null, \"b\": 2, \"c\": [\"abc\", \"xyz\"] }
]
}"</span>;
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Outer</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="ident">v</span>,
<span class="ident">Outer</span> {
<span class="ident">inner</span>: <span class="macro">vec</span><span class="macro">!</span>[
<span class="ident">Inner</span> { <span class="ident">a</span>: (), <span class="ident">b</span>: <span class="number">2</span>, <span class="ident">c</span>: <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>.<span class="ident">to_string</span>(), <span class="string">"xyz"</span>.<span class="ident">to_string</span>()] }
]
}
);
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">RustcDecodable</span>)]</span>
<span class="kw">struct</span> <span class="ident">FloatStruct</span> {
<span class="ident">f</span>: <span class="ident">f64</span>,
<span class="ident">a</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_struct_with_nan</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"{\"f\":null,\"a\":[null,123]}"</span>;
<span class="kw">let</span> <span class="ident">obj</span>: <span class="ident">FloatStruct</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">obj</span>.<span class="ident">f</span>.<span class="ident">is_nan</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">obj</span>.<span class="ident">a</span>[<span class="number">0</span>].<span class="ident">is_nan</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">obj</span>.<span class="ident">a</span>[<span class="number">1</span>], <span class="number">123f64</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_option</span>() {
<span class="kw">let</span> <span class="ident">value</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"null"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">value</span>, <span class="prelude-val">None</span>);
<span class="kw">let</span> <span class="ident">value</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"\"jodhpurs\""</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">value</span>, <span class="prelude-val">Some</span>(<span class="string">"jodhpurs"</span>.<span class="ident">to_string</span>()));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_enum</span>() {
<span class="kw">let</span> <span class="ident">value</span>: <span class="ident">Animal</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="string">"\"Dog\""</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">value</span>, <span class="ident">Dog</span>);
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}"</span>;
<span class="kw">let</span> <span class="ident">value</span>: <span class="ident">Animal</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">value</span>, <span class="ident">Frog</span>(<span class="string">"Henry"</span>.<span class="ident">to_string</span>(), <span class="number">349</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_result</span>() {
<span class="kw">let</span> <span class="ident">value</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">i8</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">4</span>);
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">encode</span>(<span class="kw-2">&</span><span class="ident">value</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json_value</span>, <span class="string">"{\"variant\":\"Ok\",\"fields\":[4]}"</span>);
<span class="kw">let</span> <span class="ident">decoded_value</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">i8</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="ident">json_value</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">decoded_value</span>, <span class="prelude-val">Ok</span>(<span class="number">4</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_map</span>() {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">"{\"a\": \"Dog\", \"b\": {\"variant\":\"Frog\",\
\"fields\":[\"Henry\", 349]}}"</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span>: <span class="ident">BTreeMap</span><span class="op"><</span><span class="ident">string</span>::<span class="ident">String</span>, <span class="ident">Animal</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">map</span>.<span class="ident">remove</span>(<span class="kw-2">&</span><span class="string">"a"</span>.<span class="ident">to_string</span>()), <span class="prelude-val">Some</span>(<span class="ident">Dog</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">map</span>.<span class="ident">remove</span>(<span class="kw-2">&</span><span class="string">"b"</span>.<span class="ident">to_string</span>()), <span class="prelude-val">Some</span>(<span class="ident">Frog</span>(<span class="string">"Henry"</span>.<span class="ident">to_string</span>(), <span class="number">349</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_multiline_errors</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\n \"foo\":\n \"bar\""</span>),
<span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">3</span>, <span class="number">8</span>)));
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">RustcDecodable</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span>
<span class="kw">struct</span> <span class="ident">DecodeStruct</span> {
<span class="ident">x</span>: <span class="ident">f64</span>,
<span class="ident">y</span>: <span class="ident">bool</span>,
<span class="ident">z</span>: <span class="ident">string</span>::<span class="ident">String</span>,
<span class="ident">w</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">RustcDecodable</span>)]</span>
<span class="kw">enum</span> <span class="ident">DecodeEnum</span> {
<span class="ident">A</span>(<span class="ident">f64</span>),
<span class="ident">B</span>(<span class="ident">string</span>::<span class="ident">String</span>)
}
<span class="kw">fn</span> <span class="ident">check_err</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Decodable</span><span class="op">></span>(<span class="ident">to_parse</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>, <span class="ident">expected</span>: <span class="ident">DecoderError</span>) {
<span class="kw">let</span> <span class="ident">res</span>: <span class="ident">DecodeResult</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="ident">to_parse</span>) {
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ParseError</span>(<span class="ident">e</span>)),
<span class="prelude-val">Ok</span>(<span class="ident">json</span>) <span class="op">=></span> <span class="ident">Decodable</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Decoder</span>::<span class="ident">new</span>(<span class="ident">json</span>))
};
<span class="kw">match</span> <span class="ident">res</span> {
<span class="prelude-val">Ok</span>(_) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"`{:?}` parsed & decoded ok, expecting error `{:?}`"</span>,
<span class="ident">to_parse</span>, <span class="ident">expected</span>),
<span class="prelude-val">Err</span>(<span class="ident">ParseError</span>(<span class="ident">e</span>)) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"`{}` is not valid json: {:?}"</span>,
<span class="ident">to_parse</span>, <span class="ident">e</span>),
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">e</span>, <span class="ident">expected</span>);
}
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_errors_struct</span>() {
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"[]"</span>, <span class="ident">ExpectedError</span>(<span class="string">"Object"</span>.<span class="ident">to_string</span>(), <span class="string">"[]"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"{\"x\": true, \"y\": true, \"z\": \"\", \"w\": []}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="string">"true"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"{\"x\": 1, \"y\": [], \"z\": \"\", \"w\": []}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Boolean"</span>.<span class="ident">to_string</span>(), <span class="string">"[]"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"{\"x\": 1, \"y\": true, \"z\": {}, \"w\": []}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"String"</span>.<span class="ident">to_string</span>(), <span class="string">"{}"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"{\"x\": 1, \"y\": true, \"z\": \"\", \"w\": null}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Array"</span>.<span class="ident">to_string</span>(), <span class="string">"null"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeStruct</span><span class="op">></span>(<span class="string">"{\"x\": 1, \"y\": true, \"z\": \"\"}"</span>,
<span class="ident">MissingFieldError</span>(<span class="string">"w"</span>.<span class="ident">to_string</span>()));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_decode_errors_enum</span>() {
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeEnum</span><span class="op">></span>(<span class="string">"{}"</span>,
<span class="ident">MissingFieldError</span>(<span class="string">"variant"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeEnum</span><span class="op">></span>(<span class="string">"{\"variant\": 1}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"String"</span>.<span class="ident">to_string</span>(), <span class="string">"1"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeEnum</span><span class="op">></span>(<span class="string">"{\"variant\": \"A\"}"</span>,
<span class="ident">MissingFieldError</span>(<span class="string">"fields"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeEnum</span><span class="op">></span>(<span class="string">"{\"variant\": \"A\", \"fields\": null}"</span>,
<span class="ident">ExpectedError</span>(<span class="string">"Array"</span>.<span class="ident">to_string</span>(), <span class="string">"null"</span>.<span class="ident">to_string</span>()));
<span class="ident">check_err</span>::<span class="op"><</span><span class="ident">DecodeEnum</span><span class="op">></span>(<span class="string">"{\"variant\": \"C\", \"fields\": []}"</span>,
<span class="ident">UnknownVariantError</span>(<span class="string">"C"</span>.<span class="ident">to_string</span>()));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_find</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"dog\" : \"cat\"}"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">found_str</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">find</span>(<span class="string">"dog"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">found_str</span>.<span class="ident">unwrap</span>().<span class="ident">as_string</span>().<span class="ident">unwrap</span>() <span class="op">==</span> <span class="string">"cat"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_find_path</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">found_str</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">find_path</span>(<span class="kw-2">&</span>[<span class="string">"dog"</span>, <span class="string">"cat"</span>, <span class="string">"mouse"</span>]);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">found_str</span>.<span class="ident">unwrap</span>().<span class="ident">as_string</span>().<span class="ident">unwrap</span>() <span class="op">==</span> <span class="string">"cheese"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_search</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">found_str</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">search</span>(<span class="string">"mouse"</span>).<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">j</span><span class="op">|</span> <span class="ident">j</span>.<span class="ident">as_string</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">found_str</span>.<span class="ident">unwrap</span>() <span class="op">==</span> <span class="string">"cheese"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_index</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"animals\":[\"dog\",\"cat\",\"mouse\"]}"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="kw-2">ref</span> <span class="ident">array</span> <span class="op">=</span> <span class="ident">json_value</span>[<span class="string">"animals"</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">array</span>[<span class="number">0</span>].<span class="ident">as_string</span>().<span class="ident">unwrap</span>(), <span class="string">"dog"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">array</span>[<span class="number">1</span>].<span class="ident">as_string</span>().<span class="ident">unwrap</span>(), <span class="string">"cat"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">array</span>[<span class="number">2</span>].<span class="ident">as_string</span>().<span class="ident">unwrap</span>(), <span class="string">"mouse"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_object</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{}"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_object</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_object</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{}"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_object</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_object</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_object</span>.<span class="ident">is_some</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_array</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1, 2, 3]"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_array</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_array</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1, 2, 3]"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_array</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_array</span>();
<span class="kw">let</span> <span class="ident">expected_length</span> <span class="op">=</span> <span class="number">3</span>;
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_array</span>.<span class="ident">is_some</span>() <span class="op">&&</span> <span class="ident">json_array</span>.<span class="ident">unwrap</span>().<span class="ident">len</span>() <span class="op">==</span> <span class="ident">expected_length</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_string</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"dog\""</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_string</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_string</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"\"dog\""</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_str</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_string</span>();
<span class="kw">let</span> <span class="ident">expected_str</span> <span class="op">=</span> <span class="string">"dog"</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json_str</span>, <span class="prelude-val">Some</span>(<span class="ident">expected_str</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_number</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_number</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_i64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_i64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_i64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12.0"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_i64</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_u64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_u64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_u64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12.0"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_u64</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_f64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_f64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-12"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">json_value</span>.<span class="ident">is_f64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12.0"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_f64</span>());
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-12.0"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_f64</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_i64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"-12"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_num</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_i64</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json_num</span>, <span class="prelude-val">Some</span>(<span class="op">-</span><span class="number">12</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_u64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_num</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_u64</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json_num</span>, <span class="prelude-val">Some</span>(<span class="number">12</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_f64</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"12.0"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_num</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_f64</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">json_num</span>, <span class="prelude-val">Some</span>(<span class="number">12f64</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_boolean</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"false"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_boolean</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_boolean</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"false"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_bool</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_boolean</span>();
<span class="kw">let</span> <span class="ident">expected_bool</span> <span class="op">=</span> <span class="bool-val">false</span>;
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_bool</span>.<span class="ident">is_some</span>() <span class="op">&&</span> <span class="ident">json_bool</span>.<span class="ident">unwrap</span>() <span class="op">==</span> <span class="ident">expected_bool</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_is_null</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"null"</span>).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_value</span>.<span class="ident">is_null</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_as_null</span>(){
<span class="kw">let</span> <span class="ident">json_value</span> <span class="op">=</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"null"</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">json_null</span> <span class="op">=</span> <span class="ident">json_value</span>.<span class="ident">as_null</span>();
<span class="kw">let</span> <span class="ident">expected_null</span> <span class="op">=</span> ();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">json_null</span>.<span class="ident">is_some</span>() <span class="op">&&</span> <span class="ident">json_null</span>.<span class="ident">unwrap</span>() <span class="op">==</span> <span class="ident">expected_null</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_encode_hashmap_with_numeric_key</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hm</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">usize</span>, <span class="ident">bool</span><span class="op">></span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="ident">hm</span>.<span class="ident">insert</span>(<span class="number">1</span>, <span class="bool-val">true</span>);
<span class="kw">let</span> <span class="ident">json_str</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="ident">hm</span>).<span class="ident">to_string</span>();
<span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="kw-2">&</span><span class="ident">json_str</span>) {
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Unable to parse json_str: {}"</span>, <span class="ident">json_str</span>),
_ <span class="op">=></span> {} <span class="comment">// it parsed and we are good to go</span>
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_negative_zero</span>() {
<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"test\":-0}"</span>).<span class="ident">unwrap</span>();
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_prettyencode_hashmap_with_numeric_key</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hm</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">usize</span>, <span class="ident">bool</span><span class="op">></span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="ident">hm</span>.<span class="ident">insert</span>(<span class="number">1</span>, <span class="bool-val">true</span>);
<span class="kw">let</span> <span class="ident">json_str</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="ident">hm</span>).<span class="ident">to_string</span>();
<span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="kw-2">&</span><span class="ident">json_str</span>) {
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Unable to parse json_str: {}"</span>, <span class="ident">json_str</span>),
_ <span class="op">=></span> {} <span class="comment">// it parsed and we are good to go</span>
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_prettyencoder_indent_level_param</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">BTreeMap</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tree</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="ident">tree</span>.<span class="ident">insert</span>(<span class="string">"hello"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">"guten tag"</span>.<span class="ident">to_string</span>()));
<span class="ident">tree</span>.<span class="ident">insert</span>(<span class="string">"goodbye"</span>.<span class="ident">to_string</span>(), <span class="ident">String</span>(<span class="string">"sayonara"</span>.<span class="ident">to_string</span>()));
<span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">Array</span>(
<span class="comment">// The following layout below should look a lot like</span>
<span class="comment">// the pretty-printed JSON (indent * x)</span>
<span class="macro">vec</span><span class="macro">!</span>
( <span class="comment">// 0x</span>
<span class="ident">String</span>(<span class="string">"greetings"</span>.<span class="ident">to_string</span>()), <span class="comment">// 1x</span>
<span class="ident">Object</span>(<span class="ident">tree</span>), <span class="comment">// 1x + 2x + 2x + 1x</span>
) <span class="comment">// 0x</span>
<span class="comment">// End JSON array (7 lines)</span>
);
<span class="comment">// Helper function for counting indents</span>
<span class="kw">fn</span> <span class="ident">indents</span>(<span class="ident">source</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="kw">let</span> <span class="ident">trimmed</span> <span class="op">=</span> <span class="ident">source</span>.<span class="ident">trim_left_matches</span>(<span class="string">' '</span>);
<span class="ident">source</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">trimmed</span>.<span class="ident">len</span>()
}
<span class="comment">// Test up to 4 spaces of indents (more?)</span>
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">4</span> {
<span class="kw">let</span> <span class="ident">printed</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">as_pretty_json</span>(<span class="kw-2">&</span><span class="ident">json</span>).<span class="ident">indent</span>(<span class="ident">i</span> <span class="kw">as</span> <span class="ident">u32</span>)
.<span class="ident">to_string</span>();
<span class="comment">// Check for indents at each line</span>
<span class="kw">let</span> <span class="ident">lines</span>: <span class="ident">Vec</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">printed</span>.<span class="ident">lines</span>().<span class="ident">collect</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lines</span>.<span class="ident">len</span>(), <span class="number">7</span>); <span class="comment">// JSON should be 7 lines</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">0</span>]), <span class="number">0</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// [</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">1</span>]), <span class="number">1</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// "greetings",</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">2</span>]), <span class="number">1</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// {</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">3</span>]), <span class="number">2</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// "hello": "guten tag",</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">4</span>]), <span class="number">2</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// "goodbye": "sayonara"</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">5</span>]), <span class="number">1</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// },</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">indents</span>(<span class="ident">lines</span>[<span class="number">6</span>]), <span class="number">0</span> <span class="op">*</span> <span class="ident">i</span>); <span class="comment">// ]</span>
<span class="comment">// Finally, test that the pretty-printed JSON is valid</span>
<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="kw-2">&</span><span class="ident">printed</span>).<span class="ident">ok</span>()
.<span class="ident">expect</span>(<span class="string">"Pretty-printed JSON is invalid!"</span>);
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_hashmap_with_numeric_key_can_handle_double_quote_delimited_key</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">use</span> <span class="ident">Decodable</span>;
<span class="kw">let</span> <span class="ident">json_str</span> <span class="op">=</span> <span class="string">"{\"1\":true}"</span>;
<span class="kw">let</span> <span class="ident">json_obj</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="ident">json_str</span>) {
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Unable to parse json_str: {}"</span>, <span class="ident">json_str</span>),
<span class="prelude-val">Ok</span>(<span class="ident">o</span>) <span class="op">=></span> <span class="ident">o</span>
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">decoder</span> <span class="op">=</span> <span class="ident">Decoder</span>::<span class="ident">new</span>(<span class="ident">json_obj</span>);
<span class="kw">let</span> <span class="ident">_hm</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">usize</span>, <span class="ident">bool</span><span class="op">></span> <span class="op">=</span> <span class="ident">Decodable</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">decoder</span>).<span class="ident">unwrap</span>();
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_hashmap_with_enum_key</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">use</span> <span class="ident">json</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">RustcEncodable</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">RustcDecodable</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">enum</span> <span class="ident">Enum</span> {
<span class="ident">Foo</span>,
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span>
<span class="ident">Bar</span>,
}
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="ident">map</span>.<span class="ident">insert</span>(<span class="ident">Enum</span>::<span class="ident">Foo</span>, <span class="number">0</span>);
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">json</span>::<span class="ident">encode</span>(<span class="kw-2">&</span><span class="ident">map</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">result</span>, <span class="string">r#"{"Foo":0}"#</span>);
<span class="kw">let</span> <span class="ident">decoded</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">Enum</span>, _<span class="op">></span> <span class="op">=</span> <span class="ident">json</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="ident">result</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">map</span>, <span class="ident">decoded</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_hashmap_with_numeric_key_will_error_with_string_keys</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="kw">use</span> <span class="ident">Decodable</span>;
<span class="kw">let</span> <span class="ident">json_str</span> <span class="op">=</span> <span class="string">"{\"a\":true}"</span>;
<span class="kw">let</span> <span class="ident">json_obj</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="ident">json_str</span>) {
<span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Unable to parse json_str: {}"</span>, <span class="ident">json_str</span>),
<span class="prelude-val">Ok</span>(<span class="ident">o</span>) <span class="op">=></span> <span class="ident">o</span>
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">decoder</span> <span class="op">=</span> <span class="ident">Decoder</span>::<span class="ident">new</span>(<span class="ident">json_obj</span>);
<span class="kw">let</span> <span class="ident">result</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HashMap</span><span class="op"><</span><span class="ident">usize</span>, <span class="ident">bool</span><span class="op">></span>, <span class="ident">DecoderError</span><span class="op">></span> <span class="op">=</span> <span class="ident">Decodable</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">decoder</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">result</span>, <span class="prelude-val">Err</span>(<span class="ident">ExpectedError</span>(<span class="string">"Number"</span>.<span class="ident">to_string</span>(), <span class="string">"a"</span>.<span class="ident">to_string</span>())));
}
<span class="kw">fn</span> <span class="ident">assert_stream_equal</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">expected</span>: <span class="ident">Vec</span><span class="op"><</span>(<span class="ident">JsonEvent</span>, <span class="ident">Vec</span><span class="op"><</span><span class="ident">StackElement</span><span class="op">></span>)<span class="op">></span>) {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">parser</span> <span class="op">=</span> <span class="ident">Parser</span>::<span class="ident">new</span>(<span class="ident">src</span>.<span class="ident">chars</span>());
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">loop</span> {
<span class="kw">let</span> <span class="ident">evt</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">parser</span>.<span class="ident">next</span>() {
<span class="prelude-val">Some</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="ident">e</span>,
<span class="prelude-val">None</span> <span class="op">=></span> { <span class="kw">break</span>; }
};
<span class="kw">let</span> (<span class="kw-2">ref</span> <span class="ident">expected_evt</span>, <span class="kw-2">ref</span> <span class="ident">expected_stack</span>) <span class="op">=</span> <span class="ident">expected</span>[<span class="ident">i</span>];
<span class="kw">if</span> <span class="op">!</span><span class="ident">parser</span>.<span class="ident">stack</span>().<span class="ident">is_equal_to</span>(<span class="kw-2">&</span><span class="ident">expected_stack</span>) {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Parser stack is not equal to {:?}"</span>, <span class="ident">expected_stack</span>);
}
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">evt</span>, <span class="ident">expected_evt</span>);
<span class="ident">i</span><span class="op">+=</span><span class="number">1</span>;
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_word_size</span> <span class="op">=</span> <span class="string">"32"</span>, <span class="ident">ignore</span>)]</span> <span class="comment">// FIXME(#14064)</span>
<span class="kw">fn</span> <span class="ident">test_streaming_parser</span>() {
<span class="ident">assert_stream_equal</span>(
<span class="string">r#"{ "foo":"bar", "array" : [0, 1, 2, 3, 4, 5], "idents":[null,true,false]}"#</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">StringValue</span>(<span class="string">"bar"</span>.<span class="ident">to_string</span>()), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"foo"</span>)]),
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>)]),
(<span class="ident">U64Value</span>(<span class="number">0</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">U64Value</span>(<span class="number">1</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">U64Value</span>(<span class="number">2</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">2</span>)]),
(<span class="ident">U64Value</span>(<span class="number">3</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">3</span>)]),
(<span class="ident">U64Value</span>(<span class="number">4</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">4</span>)]),
(<span class="ident">U64Value</span>(<span class="number">5</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>), <span class="ident">Index</span>(<span class="number">5</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"array"</span>)]),
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"idents"</span>)]),
(<span class="ident">NullValue</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"idents"</span>), <span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"idents"</span>), <span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">false</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"idents"</span>), <span class="ident">Index</span>(<span class="number">2</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"idents"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
}
<span class="kw">fn</span> <span class="ident">last_event</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">JsonEvent</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">parser</span> <span class="op">=</span> <span class="ident">Parser</span>::<span class="ident">new</span>(<span class="ident">src</span>.<span class="ident">chars</span>());
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">evt</span> <span class="op">=</span> <span class="ident">NullValue</span>;
<span class="kw">loop</span> {
<span class="ident">evt</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">parser</span>.<span class="ident">next</span>() {
<span class="prelude-val">Some</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="ident">e</span>,
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="ident">evt</span>,
}
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_word_size</span> <span class="op">=</span> <span class="string">"32"</span>, <span class="ident">ignore</span>)]</span> <span class="comment">// FIXME(#14064)</span>
<span class="kw">fn</span> <span class="ident">test_read_object_streaming</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{ "</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{1"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">KeyMustBeAString</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{ \"a\""</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\""</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\" "</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\" 1"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">ExpectedColon</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\":"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\":1"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">7</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\":1 1"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">8</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\":1,"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingObject</span>, <span class="number">1</span>, <span class="number">8</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{\"a\":1,}"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingComma</span>, <span class="number">1</span>, <span class="number">8</span>)));
<span class="ident">assert_stream_equal</span>(
<span class="string">"{}"</span>,
<span class="macro">vec</span><span class="macro">!</span>[(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]), (<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[])]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"{\"a\": 3}"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">U64Value</span>(<span class="number">3</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"a"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"{ \"a\": null, \"b\" : true }"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">NullValue</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"a"</span>)]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"{\"a\" : 1.0 ,\"b\": [ true ]}"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">F64Value</span>(<span class="number">1.0</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"a"</span>)]),
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>)]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>),<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">r#"{
"a": 1.0,
"b": [
true,
"foo\nbar",
{ "c": {"d": null} },
"\uD834\uDF06"
]
}"#</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">F64Value</span>(<span class="number">1.0</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"a"</span>)]),
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>)]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">StringValue</span>(<span class="string">"foo\nbar"</span>.<span class="ident">to_string</span>()), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">2</span>)]),
(<span class="ident">ObjectStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">2</span>), <span class="ident">Key</span>(<span class="string">"c"</span>)]),
(<span class="ident">NullValue</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">2</span>), <span class="ident">Key</span>(<span class="string">"c"</span>), <span class="ident">Key</span>(<span class="string">"d"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">2</span>), <span class="ident">Key</span>(<span class="string">"c"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">2</span>)]),
(<span class="ident">StringValue</span>(<span class="string">"\u{1D306}"</span>.<span class="ident">to_string</span>()), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>), <span class="ident">Index</span>(<span class="number">3</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Key</span>(<span class="string">"b"</span>)]),
(<span class="ident">ObjectEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_word_size</span> <span class="op">=</span> <span class="string">"32"</span>, <span class="ident">ignore</span>)]</span> <span class="comment">// FIXME(#14064)</span>
<span class="kw">fn</span> <span class="ident">test_read_array_streaming</span>() {
<span class="ident">assert_stream_equal</span>(
<span class="string">"[]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[ ]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[true]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[ false ]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">BooleanValue</span>(<span class="bool-val">false</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[null]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">NullValue</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[3, 1]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">U64Value</span>(<span class="number">3</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">U64Value</span>(<span class="number">1</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"\n[3, 2]\n"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">U64Value</span>(<span class="number">3</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">U64Value</span>(<span class="number">2</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="ident">assert_stream_equal</span>(
<span class="string">"[2, [4, 1]]"</span>,
<span class="macro">vec</span><span class="macro">!</span>[
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
(<span class="ident">U64Value</span>(<span class="number">2</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">ArrayStart</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">U64Value</span>(<span class="number">4</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Index</span>(<span class="number">0</span>)]),
(<span class="ident">U64Value</span>(<span class="number">1</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Index</span>(<span class="number">1</span>)]),
(<span class="ident">ArrayEnd</span>, <span class="macro">vec</span><span class="macro">!</span>[]),
]
);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"["</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"["</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingArray</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1,"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">EOFWhileParsingValue</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[1,]"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"[6 7]"</span>), <span class="prelude-val">Err</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_trailing_characters_streaming</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"nulla"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"truea"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">5</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"falsea"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">6</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"1a"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"[]a"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">3</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"{}a"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">TrailingCharacters</span>, <span class="number">1</span>, <span class="number">3</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_read_identifiers_streaming</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Parser</span>::<span class="ident">new</span>(<span class="string">"null"</span>.<span class="ident">chars</span>()).<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="ident">NullValue</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Parser</span>::<span class="ident">new</span>(<span class="string">"true"</span>.<span class="ident">chars</span>()).<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="ident">BooleanValue</span>(<span class="bool-val">true</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Parser</span>::<span class="ident">new</span>(<span class="string">"false"</span>.<span class="ident">chars</span>()).<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="ident">BooleanValue</span>(<span class="bool-val">false</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"n"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"nul"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"t"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"truz"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">4</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"f"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">2</span>)));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">last_event</span>(<span class="string">"faz"</span>), <span class="ident">Error</span>(<span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">3</span>)));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_stack</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stack</span> <span class="op">=</span> <span class="ident">Stack</span>::<span class="ident">new</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">is_empty</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">stack</span>.<span class="ident">last_is_index</span>());
<span class="ident">stack</span>.<span class="ident">push_index</span>(<span class="number">0</span>);
<span class="ident">stack</span>.<span class="ident">bump_index</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">is_equal_to</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">last_is_index</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">0</span>) <span class="op">==</span> <span class="ident">Index</span>(<span class="number">1</span>));
<span class="ident">stack</span>.<span class="ident">push_key</span>(<span class="string">"foo"</span>.<span class="ident">to_string</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">2</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">is_equal_to</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">stack</span>.<span class="ident">last_is_index</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">0</span>) <span class="op">==</span> <span class="ident">Index</span>(<span class="number">1</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">1</span>) <span class="op">==</span> <span class="ident">Key</span>(<span class="string">"foo"</span>));
<span class="ident">stack</span>.<span class="ident">push_key</span>(<span class="string">"bar"</span>.<span class="ident">to_string</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">3</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">is_equal_to</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>), <span class="ident">Key</span>(<span class="string">"bar"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>), <span class="ident">Key</span>(<span class="string">"bar"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Key</span>(<span class="string">"bar"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Key</span>(<span class="string">"foo"</span>), <span class="ident">Key</span>(<span class="string">"bar"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>), <span class="ident">Key</span>(<span class="string">"bar"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">stack</span>.<span class="ident">last_is_index</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">0</span>) <span class="op">==</span> <span class="ident">Index</span>(<span class="number">1</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">1</span>) <span class="op">==</span> <span class="ident">Key</span>(<span class="string">"foo"</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">2</span>) <span class="op">==</span> <span class="ident">Key</span>(<span class="string">"bar"</span>));
<span class="ident">stack</span>.<span class="ident">pop</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">2</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">is_equal_to</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">starts_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Index</span>(<span class="number">1</span>), <span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">ends_with</span>(<span class="kw-2">&</span>[<span class="ident">Key</span>(<span class="string">"foo"</span>)]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">stack</span>.<span class="ident">last_is_index</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">0</span>) <span class="op">==</span> <span class="ident">Index</span>(<span class="number">1</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">stack</span>.<span class="ident">get</span>(<span class="number">1</span>) <span class="op">==</span> <span class="ident">Key</span>(<span class="string">"foo"</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_json</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::{<span class="ident">HashMap</span>,<span class="ident">BTreeMap</span>};
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">ToJson</span>;
<span class="kw">let</span> <span class="ident">array2</span> <span class="op">=</span> <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>(<span class="ident">I64</span>(<span class="number">1</span>), <span class="ident">I64</span>(<span class="number">2</span>)));
<span class="kw">let</span> <span class="ident">array3</span> <span class="op">=</span> <span class="ident">Array</span>(<span class="macro">vec</span><span class="macro">!</span>(<span class="ident">I64</span>(<span class="number">1</span>), <span class="ident">I64</span>(<span class="number">2</span>), <span class="ident">I64</span>(<span class="number">3</span>)));
<span class="kw">let</span> <span class="ident">object</span> <span class="op">=</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tree_map</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="ident">tree_map</span>.<span class="ident">insert</span>(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="ident">U64</span>(<span class="number">1</span>));
<span class="ident">tree_map</span>.<span class="ident">insert</span>(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="ident">U64</span>(<span class="number">2</span>));
<span class="ident">Object</span>(<span class="ident">tree_map</span>)
};
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">array2</span>.<span class="ident">to_json</span>(), <span class="ident">array2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">object</span>.<span class="ident">to_json</span>(), <span class="ident">object</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">3_isize</span>.<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">3</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">4_i8</span>.<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">4</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">5_i16</span>.<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">5</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">6_i32</span>.<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">6</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">7_i64</span>.<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">7</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">8_usize</span>.<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">8</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">9_u8</span>.<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">9</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">10_u16</span>.<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">10</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">11_u32</span>.<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">11</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">12_u64</span>.<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">12</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">13.0_f32</span>.<span class="ident">to_json</span>(), <span class="ident">F64</span>(<span class="number">13.0_f64</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">14.0_f64</span>.<span class="ident">to_json</span>(), <span class="ident">F64</span>(<span class="number">14.0_f64</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(().<span class="ident">to_json</span>(), <span class="ident">Null</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">f32</span>::<span class="ident">INFINITY</span>.<span class="ident">to_json</span>(), <span class="ident">Null</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">f64</span>::<span class="ident">NAN</span>.<span class="ident">to_json</span>(), <span class="ident">Null</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="bool-val">true</span>.<span class="ident">to_json</span>(), <span class="ident">Boolean</span>(<span class="bool-val">true</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="bool-val">false</span>.<span class="ident">to_json</span>(), <span class="ident">Boolean</span>(<span class="bool-val">false</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"abc"</span>.<span class="ident">to_json</span>(), <span class="ident">String</span>(<span class="string">"abc"</span>.<span class="ident">to_string</span>()));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"abc"</span>.<span class="ident">to_string</span>().<span class="ident">to_json</span>(), <span class="ident">String</span>(<span class="string">"abc"</span>.<span class="ident">to_string</span>()));
<span class="macro">assert_eq</span><span class="macro">!</span>((<span class="number">1</span>, <span class="number">2</span>).<span class="ident">to_json</span>(), <span class="ident">array2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>((<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>).<span class="ident">to_json</span>(), <span class="ident">array3</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>([<span class="number">1</span>, <span class="number">2</span>].<span class="ident">to_json</span>(), <span class="ident">array2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>((<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]).<span class="ident">to_json</span>(), <span class="ident">array3</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>((<span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>]).<span class="ident">to_json</span>(), <span class="ident">array2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">vec</span><span class="macro">!</span>(<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>).<span class="ident">to_json</span>(), <span class="ident">array3</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tree_map</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
<span class="ident">tree_map</span>.<span class="ident">insert</span>(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="number">1</span> <span class="kw">as</span> <span class="ident">u32</span>);
<span class="ident">tree_map</span>.<span class="ident">insert</span>(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">tree_map</span>.<span class="ident">to_json</span>(), <span class="ident">object</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hash_map</span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="ident">hash_map</span>.<span class="ident">insert</span>(<span class="string">"a"</span>.<span class="ident">to_string</span>(), <span class="number">1</span> <span class="kw">as</span> <span class="ident">u32</span>);
<span class="ident">hash_map</span>.<span class="ident">insert</span>(<span class="string">"b"</span>.<span class="ident">to_string</span>(), <span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">hash_map</span>.<span class="ident">to_json</span>(), <span class="ident">object</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="number">15</span>).<span class="ident">to_json</span>(), <span class="ident">I64</span>(<span class="number">15</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="number">15</span> <span class="kw">as</span> <span class="ident">u32</span>).<span class="ident">to_json</span>(), <span class="ident">U64</span>(<span class="number">15</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>::<span class="op"><</span><span class="ident">isize</span><span class="op">></span>.<span class="ident">to_json</span>(), <span class="ident">Null</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_encode_hashmap_with_arbitrary_key</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">RustcEncodable</span>)]</span>
<span class="kw">struct</span> <span class="ident">ArbitraryType</span>(<span class="ident">u32</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hm</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="ident">ArbitraryType</span>, <span class="ident">bool</span><span class="op">></span> <span class="op">=</span> <span class="ident">HashMap</span>::<span class="ident">new</span>();
<span class="ident">hm</span>.<span class="ident">insert</span>(<span class="ident">ArbitraryType</span>(<span class="number">1</span>), <span class="bool-val">true</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mem_buf</span> <span class="op">=</span> <span class="ident">string</span>::<span class="ident">String</span>::<span class="ident">new</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">encoder</span> <span class="op">=</span> <span class="ident">Encoder</span>::<span class="ident">new</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">mem_buf</span>);
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">hm</span>.<span class="ident">encode</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">encoder</span>);
<span class="kw">match</span> <span class="ident">result</span>.<span class="ident">err</span>().<span class="ident">unwrap</span>() {
<span class="ident">EncoderError</span>::<span class="ident">BadHashmapKey</span> <span class="op">=></span> (),
_ <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"expected bad hash map key"</span>)
}
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_encode_decode_phantom_data</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">RustcDecodable</span>, <span class="ident">RustcEncodable</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">struct</span> <span class="ident">Foo</span><span class="op"><</span><span class="ident">P</span><span class="op">></span> {
<span class="ident">phantom_data</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">P</span><span class="op">></span>
}
<span class="kw">let</span> <span class="ident">f</span>: <span class="ident">Foo</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">Foo</span> {
<span class="ident">phantom_data</span>: <span class="ident">PhantomData</span>
};
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">encode</span>(<span class="kw-2">&</span><span class="ident">f</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">d</span>: <span class="ident">Foo</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="ident">d</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_bad_json_stack_depleted</span>() {
<span class="kw">use</span> <span class="ident">json</span>;
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">RustcDecodable</span>)]</span>
<span class="kw">enum</span> <span class="ident">ChatEvent</span> {
<span class="ident">Variant</span>(<span class="ident">i32</span>)
}
<span class="kw">let</span> <span class="ident">serialized</span> <span class="op">=</span> <span class="string">"{\"variant\": \"Variant\", \"fields\": []}"</span>;
<span class="kw">let</span> <span class="ident">r</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ChatEvent</span>, _<span class="op">></span> <span class="op">=</span> <span class="ident">json</span>::<span class="ident">decode</span>(<span class="ident">serialized</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">r</span>.<span class="ident">unwrap_err</span>() <span class="op">==</span> <span class="ident">EOF</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fixed_length_array</span>() {
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">RustcDecodable</span>, <span class="ident">RustcEncodable</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">struct</span> <span class="ident">Foo</span> {
<span class="ident">a</span>: [<span class="ident">u8</span>; <span class="number">1</span>],
<span class="ident">b</span>: [<span class="ident">i32</span>; <span class="number">2</span>],
<span class="ident">c</span>: [<span class="ident">u64</span>; <span class="number">3</span>],
}
<span class="kw">let</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">Foo</span> {
<span class="ident">a</span>: [<span class="number">0</span>],
<span class="ident">b</span>: [<span class="number">1</span>, <span class="number">2</span>],
<span class="ident">c</span>: [<span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>],
};
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">encode</span>(<span class="kw-2">&</span><span class="ident">f</span>).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">d</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">decode</span>(<span class="kw-2">&</span><span class="ident">s</span>).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="ident">d</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_unexpected_token</span>() {
<span class="kw">match</span> <span class="ident">Json</span>::<span class="ident">from_str</span>(<span class="string">"{\"\":\"\",\"\":{\"\":\"\",\"\":[{\"\":\"\",}}}"</span>) {
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">e</span>, <span class="ident">SyntaxError</span>(<span class="ident">InvalidSyntax</span>, <span class="number">1</span>, <span class="number">32</span>)),
_ <span class="op">=></span> ()
};
}
}
</pre>
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