| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374 |
- <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `Encoder` trait in crate `rustc_serialize`."><meta name="keywords" content="rust, rustlang, rust-lang, Encoder"><title>rustc_serialize::Encoder - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../rustc_serialize/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Trait Encoder</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Error">Error</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.emit_nil">emit_nil</a><a href="#tymethod.emit_usize">emit_usize</a><a href="#tymethod.emit_u64">emit_u64</a><a href="#tymethod.emit_u32">emit_u32</a><a href="#tymethod.emit_u16">emit_u16</a><a href="#tymethod.emit_u8">emit_u8</a><a href="#tymethod.emit_isize">emit_isize</a><a href="#tymethod.emit_i64">emit_i64</a><a href="#tymethod.emit_i32">emit_i32</a><a href="#tymethod.emit_i16">emit_i16</a><a href="#tymethod.emit_i8">emit_i8</a><a href="#tymethod.emit_bool">emit_bool</a><a href="#tymethod.emit_f64">emit_f64</a><a href="#tymethod.emit_f32">emit_f32</a><a href="#tymethod.emit_char">emit_char</a><a href="#tymethod.emit_str">emit_str</a><a href="#tymethod.emit_enum">emit_enum</a><a href="#tymethod.emit_enum_variant">emit_enum_variant</a><a href="#tymethod.emit_enum_variant_arg">emit_enum_variant_arg</a><a href="#tymethod.emit_enum_struct_variant">emit_enum_struct_variant</a><a href="#tymethod.emit_enum_struct_variant_field">emit_enum_struct_variant_field</a><a href="#tymethod.emit_struct">emit_struct</a><a href="#tymethod.emit_struct_field">emit_struct_field</a><a href="#tymethod.emit_tuple">emit_tuple</a><a href="#tymethod.emit_tuple_arg">emit_tuple_arg</a><a href="#tymethod.emit_tuple_struct">emit_tuple_struct</a><a href="#tymethod.emit_tuple_struct_arg">emit_tuple_struct_arg</a><a href="#tymethod.emit_option">emit_option</a><a href="#tymethod.emit_option_none">emit_option_none</a><a href="#tymethod.emit_option_some">emit_option_some</a><a href="#tymethod.emit_seq">emit_seq</a><a href="#tymethod.emit_seq_elt">emit_seq_elt</a><a href="#tymethod.emit_map">emit_map</a><a href="#tymethod.emit_map_elt_key">emit_map_elt_key</a><a href="#tymethod.emit_map_elt_val">emit_map_elt_val</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>rustc_serialize</a></p><script>window.sidebarCurrent = {name: 'Encoder', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Trait <a href='index.html'>rustc_serialize</a>::<wbr><a class="trait" href=''>Encoder</a></span><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/rustc_serialize/serialize.rs.html#47-489' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust trait'>pub trait Encoder {
- type <a href='#associatedtype.Error' class="type">Error</a>;
- fn <a href='#tymethod.emit_nil' class='fnname'>emit_nil</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_usize' class='fnname'>emit_usize</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_u64' class='fnname'>emit_u64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_u32' class='fnname'>emit_u32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_u16' class='fnname'>emit_u16</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_u8' class='fnname'>emit_u8</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_isize' class='fnname'>emit_isize</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_i64' class='fnname'>emit_i64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_i32' class='fnname'>emit_i32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_i16' class='fnname'>emit_i16</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_i8' class='fnname'>emit_i8</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_bool' class='fnname'>emit_bool</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_f64' class='fnname'>emit_f64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_f32' class='fnname'>emit_f32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_char' class='fnname'>emit_char</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_str' class='fnname'>emit_str</a>(&mut self, v: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_enum' class='fnname'>emit_enum</a><F>(&mut self, name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_enum_variant' class='fnname'>emit_enum_variant</a><F>(<br> &mut self, <br> v_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> v_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_enum_variant_arg' class='fnname'>emit_enum_variant_arg</a><F>(<br> &mut self, <br> a_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_enum_struct_variant' class='fnname'>emit_enum_struct_variant</a><F>(<br> &mut self, <br> v_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> v_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_enum_struct_variant_field' class='fnname'>emit_enum_struct_variant_field</a><F>(<br> &mut self, <br> f_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_struct' class='fnname'>emit_struct</a><F>(<br> &mut self, <br> name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_struct_field' class='fnname'>emit_struct_field</a><F>(<br> &mut self, <br> f_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_tuple' class='fnname'>emit_tuple</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_tuple_arg' class='fnname'>emit_tuple_arg</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_tuple_struct' class='fnname'>emit_tuple_struct</a><F>(<br> &mut self, <br> name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_tuple_struct_arg' class='fnname'>emit_tuple_struct_arg</a><F>(<br> &mut self, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_option' class='fnname'>emit_option</a><F>(&mut self, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_option_none' class='fnname'>emit_option_none</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_option_some' class='fnname'>emit_option_some</a><F>(&mut self, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_seq' class='fnname'>emit_seq</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_seq_elt' class='fnname'>emit_seq_elt</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_map' class='fnname'>emit_map</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_map_elt_key' class='fnname'>emit_map_elt_key</a><F>(<br> &mut self, <br> idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- <div class='item-spacer'></div> fn <a href='#tymethod.emit_map_elt_val' class='fnname'>emit_map_elt_val</a><F>(<br> &mut self, <br> idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></span>;
- }</pre></div><div class='docblock'><p>Trait for writing out an encoding when serializing.</p>
- <p>This trait provides methods to encode basic types and generic forms of
- collections. Implementations of <code>Encodable</code> use it to perform the actual
- encoding of a type.</p>
- <p>It is unspecified what is done with the encoding - it could be stored in a
- variable, or written directly to a file, for example.</p>
- <p>Encoders can expect to only have a single "root" method call made on this
- trait. Non-trivial types will call one of the collection-emitting methods,
- passing a function that may call other methods on the trait, but once the
- collection-emitting method has returned, encoding should be complete.</p>
- </div>
- <h2 id='associated-types' class='small-section-header'>
- Associated Types<a href='#associated-types' class='anchor'></a>
- </h2>
- <div class='methods'>
- <h3 id='associatedtype.Error' class='method'><span id='Error.t' class='invisible'><code>type <a href='#associatedtype.Error' class="type">Error</a></code></span></h3><div class='docblock'><p>The error type for method results.</p>
- </div></div>
- <h2 id='required-methods' class='small-section-header'>
- Required Methods<a href='#required-methods' class='anchor'></a>
- </h2>
- <div class='methods'>
- <h3 id='tymethod.emit_nil' class='method'><span id='emit_nil.v' class='invisible'><code>fn <a href='#tymethod.emit_nil' class='fnname'>emit_nil</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a nil value.</p>
- <p>For example, this might be stored as the null keyword in JSON.</p>
- </div><h3 id='tymethod.emit_usize' class='method'><span id='emit_usize.v' class='invisible'><code>fn <a href='#tymethod.emit_usize' class='fnname'>emit_usize</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a usize value.</p>
- </div><h3 id='tymethod.emit_u64' class='method'><span id='emit_u64.v' class='invisible'><code>fn <a href='#tymethod.emit_u64' class='fnname'>emit_u64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a u64 value.</p>
- </div><h3 id='tymethod.emit_u32' class='method'><span id='emit_u32.v' class='invisible'><code>fn <a href='#tymethod.emit_u32' class='fnname'>emit_u32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a u32 value.</p>
- </div><h3 id='tymethod.emit_u16' class='method'><span id='emit_u16.v' class='invisible'><code>fn <a href='#tymethod.emit_u16' class='fnname'>emit_u16</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a u16 value.</p>
- </div><h3 id='tymethod.emit_u8' class='method'><span id='emit_u8.v' class='invisible'><code>fn <a href='#tymethod.emit_u8' class='fnname'>emit_u8</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a u8 value.</p>
- </div><h3 id='tymethod.emit_isize' class='method'><span id='emit_isize.v' class='invisible'><code>fn <a href='#tymethod.emit_isize' class='fnname'>emit_isize</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a isize value.</p>
- </div><h3 id='tymethod.emit_i64' class='method'><span id='emit_i64.v' class='invisible'><code>fn <a href='#tymethod.emit_i64' class='fnname'>emit_i64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a i64 value.</p>
- </div><h3 id='tymethod.emit_i32' class='method'><span id='emit_i32.v' class='invisible'><code>fn <a href='#tymethod.emit_i32' class='fnname'>emit_i32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a i32 value.</p>
- </div><h3 id='tymethod.emit_i16' class='method'><span id='emit_i16.v' class='invisible'><code>fn <a href='#tymethod.emit_i16' class='fnname'>emit_i16</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a i16 value.</p>
- </div><h3 id='tymethod.emit_i8' class='method'><span id='emit_i8.v' class='invisible'><code>fn <a href='#tymethod.emit_i8' class='fnname'>emit_i8</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a i8 value.</p>
- </div><h3 id='tymethod.emit_bool' class='method'><span id='emit_bool.v' class='invisible'><code>fn <a href='#tymethod.emit_bool' class='fnname'>emit_bool</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a bool value.</p>
- <p>For example, this might be stored as the true and false keywords in
- JSON.</p>
- </div><h3 id='tymethod.emit_f64' class='method'><span id='emit_f64.v' class='invisible'><code>fn <a href='#tymethod.emit_f64' class='fnname'>emit_f64</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a f64 value.</p>
- </div><h3 id='tymethod.emit_f32' class='method'><span id='emit_f32.v' class='invisible'><code>fn <a href='#tymethod.emit_f32' class='fnname'>emit_f32</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a f32 value.</p>
- </div><h3 id='tymethod.emit_char' class='method'><span id='emit_char.v' class='invisible'><code>fn <a href='#tymethod.emit_char' class='fnname'>emit_char</a>(&mut self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a char value.</p>
- <p>Note that strings should be emitted using <code>emit_str</code>, not as a sequence
- of <code>emit_char</code> calls.</p>
- </div><h3 id='tymethod.emit_str' class='method'><span id='emit_str.v' class='invisible'><code>fn <a href='#tymethod.emit_str' class='fnname'>emit_str</a>(&mut self, v: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit a string value.</p>
- </div><h3 id='tymethod.emit_enum' class='method'><span id='emit_enum.v' class='invisible'><code>fn <a href='#tymethod.emit_enum' class='fnname'>emit_enum</a><F>(&mut self, name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit an enumeration value.</p>
- <ul>
- <li><code>name</code> indicates the enumeration type name.</li>
- <li><code>f</code> is a function that will call <code>emit_enum_variant</code> or
- <code>emit_enum_struct_variant</code> as appropriate to write the actual value.</li>
- </ul>
- </div><h3 id='tymethod.emit_enum_variant' class='method'><span id='emit_enum_variant.v' class='invisible'><code>fn <a href='#tymethod.emit_enum_variant' class='fnname'>emit_enum_variant</a><F>(<br> &mut self, <br> v_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> v_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a enumeration variant value with no or unnamed data.</p>
- <p>This should only be called from a function passed to <code>emit_enum</code>.
- Variants with named data should use <code>emit_enum_struct_variant</code>.</p>
- <ul>
- <li><code>v_name</code> is the variant name</li>
- <li><code>v_id</code> is the numeric identifier for the variant.</li>
- <li><code>len</code> is the number of data items associated with the variant.</li>
- <li><code>f</code> is a function that will call <code>emit_enum_variant_arg</code> for each data
- item. It may not be called if len is 0.</li>
- </ul>
- <h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
- <pre class="rust rust-example-rendered">
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encodable</span>;
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encoder</span>;
- <span class="kw">enum</span> <span class="ident">Message</span> {
- <span class="ident">Quit</span>,
- <span class="ident">ChangeColor</span>(<span class="ident">i32</span>, <span class="ident">i32</span>, <span class="ident">i32</span>),
- }
- <span class="kw">impl</span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">Message</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">s</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="ident">s</span>.<span class="ident">emit_enum</span>(<span class="string">"Message"</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
- <span class="ident">Message</span>::<span class="ident">Quit</span> <span class="op">=></span> {
- <span class="ident">s</span>.<span class="ident">emit_enum_variant</span>(<span class="string">"Quit"</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="prelude-val">Ok</span>(()))
- }
- <span class="ident">Message</span>::<span class="ident">ChangeColor</span>(<span class="ident">r</span>, <span class="ident">g</span>, <span class="ident">b</span>) <span class="op">=></span> {
- <span class="ident">s</span>.<span class="ident">emit_enum_variant</span>(<span class="string">"ChangeColor"</span>, <span class="number">1</span>, <span class="number">3</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_enum_variant_arg</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">r</span>)
- }));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_enum_variant_arg</span>(<span class="number">1</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">g</span>)
- }));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_enum_variant_arg</span>(<span class="number">2</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">b</span>)
- }));
- <span class="prelude-val">Ok</span>(())
- })
- }
- }
- })
- }
- }</pre>
- </div><h3 id='tymethod.emit_enum_variant_arg' class='method'><span id='emit_enum_variant_arg.v' class='invisible'><code>fn <a href='#tymethod.emit_enum_variant_arg' class='fnname'>emit_enum_variant_arg</a><F>(<br> &mut self, <br> a_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit an unnamed data item for an enumeration variant.</p>
- <p>This should only be called from a function passed to
- <code>emit_enum_variant</code>.</p>
- <ul>
- <li><code>a_idx</code> is the (zero-based) index of the data item.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that variant data items must be emitted in order - starting with
- index <code>0</code> and finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_enum_struct_variant' class='method'><span id='emit_enum_struct_variant.v' class='invisible'><code>fn <a href='#tymethod.emit_enum_struct_variant' class='fnname'>emit_enum_struct_variant</a><F>(<br> &mut self, <br> v_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> v_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a enumeration variant value with no or named data.</p>
- <p>This should only be called from a function passed to <code>emit_enum</code>.
- Variants with unnamed data should use <code>emit_enum_variant</code>.</p>
- <ul>
- <li><code>v_name</code> is the variant name.</li>
- <li><code>v_id</code> is the numeric identifier for the variant.</li>
- <li><code>len</code> is the number of data items associated with the variant.</li>
- <li><code>f</code> is a function that will call <code>emit_enum_struct_variant_field</code> for
- each data item. It may not be called if <code>len</code> is <code>0</code>.</li>
- </ul>
- <h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
- <pre class="rust rust-example-rendered">
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encodable</span>;
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encoder</span>;
- <span class="kw">enum</span> <span class="ident">Message</span> {
- <span class="ident">Quit</span>,
- <span class="ident">Move</span> { <span class="ident">x</span>: <span class="ident">i32</span>, <span class="ident">y</span>: <span class="ident">i32</span> },
- }
- <span class="kw">impl</span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">Message</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">s</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="ident">s</span>.<span class="ident">emit_enum</span>(<span class="string">"Message"</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
- <span class="ident">Message</span>::<span class="ident">Quit</span> <span class="op">=></span> {
- <span class="ident">s</span>.<span class="ident">emit_enum_struct_variant</span>(<span class="string">"Quit"</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="prelude-val">Ok</span>(()))
- }
- <span class="ident">Message</span>::<span class="ident">Move</span> { <span class="ident">x</span>: <span class="ident">x</span>, <span class="ident">y</span>: <span class="ident">y</span> } <span class="op">=></span> {
- <span class="ident">s</span>.<span class="ident">emit_enum_struct_variant</span>(<span class="string">"Move"</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_enum_struct_variant_field</span>(<span class="string">"x"</span>, <span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">x</span>)
- }));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_enum_struct_variant_field</span>(<span class="string">"y"</span>, <span class="number">1</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">y</span>)
- }));
- <span class="prelude-val">Ok</span>(())
- })
- }
- }
- })
- }
- }</pre>
- </div><h3 id='tymethod.emit_enum_struct_variant_field' class='method'><span id='emit_enum_struct_variant_field.v' class='invisible'><code>fn <a href='#tymethod.emit_enum_struct_variant_field' class='fnname'>emit_enum_struct_variant_field</a><F>(<br> &mut self, <br> f_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a named data item for an enumeration variant.</p>
- <p>This should only be called from a function passed to
- <code>emit_enum_struct_variant</code>.</p>
- <ul>
- <li><code>f_name</code> is the name of the data item field.</li>
- <li><code>f_idx</code> is its (zero-based) index.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that fields must be emitted in order - starting with index <code>0</code> and
- finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_struct' class='method'><span id='emit_struct.v' class='invisible'><code>fn <a href='#tymethod.emit_struct' class='fnname'>emit_struct</a><F>(<br> &mut self, <br> name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a struct value.</p>
- <ul>
- <li><code>name</code> is the name of the struct.</li>
- <li><code>len</code> is the number of members.</li>
- <li><code>f</code> is a function that calls <code>emit_struct_field</code> for each member.</li>
- </ul>
- <h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
- <pre class="rust rust-example-rendered">
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encodable</span>;
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encoder</span>;
- <span class="kw">struct</span> <span class="ident">Point</span> {
- <span class="ident">x</span>: <span class="ident">i32</span>,
- <span class="ident">y</span>: <span class="ident">i32</span>,
- }
- <span class="kw">impl</span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">Point</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">s</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="ident">s</span>.<span class="ident">emit_struct</span>(<span class="string">"Point"</span>, <span class="number">2</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_struct_field</span>(<span class="string">"x"</span>, <span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="self">self</span>.<span class="ident">x</span>)
- }));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_struct_field</span>(<span class="string">"y"</span>, <span class="number">1</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="self">self</span>.<span class="ident">y</span>)
- }));
- <span class="prelude-val">Ok</span>(())
- })
- }
- }</pre>
- </div><h3 id='tymethod.emit_struct_field' class='method'><span id='emit_struct_field.v' class='invisible'><code>fn <a href='#tymethod.emit_struct_field' class='fnname'>emit_struct_field</a><F>(<br> &mut self, <br> f_name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a field item for a struct.</p>
- <p>This should only be called from a function passed to <code>emit_struct</code>.</p>
- <ul>
- <li><code>f_name</code> is the name of the data item field.</li>
- <li><code>f_idx</code> is its (zero-based) index.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that fields must be emitted in order - starting with index <code>0</code> and
- finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_tuple' class='method'><span id='emit_tuple.v' class='invisible'><code>fn <a href='#tymethod.emit_tuple' class='fnname'>emit_tuple</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a tuple value.</p>
- <ul>
- <li><code>len</code> is the number of items in the tuple.</li>
- <li><code>f</code> is a function that calls <code>emit_tuple_arg</code> for each member.</li>
- </ul>
- <p>Note that external <code>Encodable</code> implementations should not normally need
- to use this method directly; it is meant for the use of this module's
- own implementation of <code>Encodable</code> for tuples.</p>
- </div><h3 id='tymethod.emit_tuple_arg' class='method'><span id='emit_tuple_arg.v' class='invisible'><code>fn <a href='#tymethod.emit_tuple_arg' class='fnname'>emit_tuple_arg</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a data item for a tuple.</p>
- <p>This should only be called from a function passed to <code>emit_tuple</code>.</p>
- <ul>
- <li><code>idx</code> is the (zero-based) index of the data item.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that tuple items must be emitted in order - starting with index <code>0</code>
- and finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_tuple_struct' class='method'><span id='emit_tuple_struct.v' class='invisible'><code>fn <a href='#tymethod.emit_tuple_struct' class='fnname'>emit_tuple_struct</a><F>(<br> &mut self, <br> name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a tuple struct value.</p>
- <ul>
- <li><code>name</code> is the name of the tuple struct.</li>
- <li><code>len</code> is the number of items in the tuple struct.</li>
- <li><code>f</code> is a function that calls <code>emit_tuple_struct_arg</code> for each member.</li>
- </ul>
- <h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1>
- <pre class="rust rust-example-rendered">
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encodable</span>;
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encoder</span>;
- <span class="kw">struct</span> <span class="ident">Pair</span>(<span class="ident">i32</span>,<span class="ident">i32</span>);
- <span class="kw">impl</span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">Pair</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">s</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">let</span> <span class="ident">Pair</span>(<span class="ident">first</span>,<span class="ident">second</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span>;
- <span class="ident">s</span>.<span class="ident">emit_tuple_struct</span>(<span class="string">"Pair"</span>, <span class="number">2</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_tuple_arg</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">first</span>)
- }));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_tuple_arg</span>(<span class="number">1</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="ident">s</span>.<span class="ident">emit_i32</span>(<span class="ident">second</span>)
- }));
- <span class="prelude-val">Ok</span>(())
- })
- }
- }</pre>
- </div><h3 id='tymethod.emit_tuple_struct_arg' class='method'><span id='emit_tuple_struct_arg.v' class='invisible'><code>fn <a href='#tymethod.emit_tuple_struct_arg' class='fnname'>emit_tuple_struct_arg</a><F>(<br> &mut self, <br> f_idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> f: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a data item for a tuple struct.</p>
- <p>This should only be called from a function passed to
- <code>emit_tuple_struct</code>.</p>
- <ul>
- <li><code>f_idx</code> is the (zero-based) index of the data item.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that tuple items must be emitted in order - starting with index <code>0</code>
- and finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_option' class='method'><span id='emit_option.v' class='invisible'><code>fn <a href='#tymethod.emit_option' class='fnname'>emit_option</a><F>(&mut self, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit an optional value.</p>
- <p><code>f</code> is a function that will call either <code>emit_option_none</code> or
- <code>emit_option_some</code> as appropriate.</p>
- <p>This method allows encoders to handle <code>Option<T></code> values specially,
- rather than using the generic enum methods, because many encoding
- formats have a built-in "optional" concept.</p>
- <p>Note that external <code>Encodable</code> implementations should not normally need
- to use this method directly; it is meant for the use of this module's
- own implementation of <code>Encodable</code> for <code>Option<T></code>.</p>
- </div><h3 id='tymethod.emit_option_none' class='method'><span id='emit_option_none.v' class='invisible'><code>fn <a href='#tymethod.emit_option_none' class='fnname'>emit_option_none</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>></code></span></h3><div class='docblock'><p>Emit the <code>None</code> optional value.</p>
- <p>This should only be called from a function passed to <code>emit_option</code>.</p>
- </div><h3 id='tymethod.emit_option_some' class='method'><span id='emit_option_some.v' class='invisible'><code>fn <a href='#tymethod.emit_option_some' class='fnname'>emit_option_some</a><F>(&mut self, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit the <code>Some(x)</code> optional value.</p>
- <p><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</p>
- <p>This should only be called from a function passed to <code>emit_option</code>.</p>
- </div><h3 id='tymethod.emit_seq' class='method'><span id='emit_seq.v' class='invisible'><code>fn <a href='#tymethod.emit_seq' class='fnname'>emit_seq</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit a sequence of values.</p>
- <p>This should be used for both array-like ordered sequences and set-like
- unordered ones.</p>
- <ul>
- <li><code>len</code> is the number of values in the sequence.</li>
- <li><code>f</code> is a function that will call <code>emit_seq_elt</code> for each value in the
- sequence.</li>
- </ul>
- </div><h3 id='tymethod.emit_seq_elt' class='method'><span id='emit_seq_elt.v' class='invisible'><code>fn <a href='#tymethod.emit_seq_elt' class='fnname'>emit_seq_elt</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit an element in a sequence.</p>
- <p>This should only be called from a function passed to <code>emit_seq</code>.</p>
- <ul>
- <li><code>idx</code> is the (zero-based) index of the value in the sequence.</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the data object.</li>
- </ul>
- <p>Note that sequence elements must be emitted in order - starting with
- index <code>0</code> and finishing with index <code>len-1</code>.</p>
- </div><h3 id='tymethod.emit_map' class='method'><span id='emit_map.v' class='invisible'><code>fn <a href='#tymethod.emit_map' class='fnname'>emit_map</a><F>(&mut self, len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit an associative container (map).</p>
- <ul>
- <li><code>len</code> is the number of entries in the map.</li>
- <li><code>f</code> is a function that will call <code>emit_map_elt_key</code> and
- <code>emit_map_elt_val</code> for each entry in the map.</li>
- </ul>
- <h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1>
- <pre class="rust rust-example-rendered">
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encodable</span>;
- <span class="kw">use</span> <span class="ident">rustc_serialize</span>::<span class="ident">Encoder</span>;
- <span class="kw">struct</span> <span class="ident">SimpleMap</span><span class="op"><</span><span class="ident">K</span>,<span class="ident">V</span><span class="op">></span> {
- <span class="ident">entries</span>: <span class="ident">Vec</span><span class="op"><</span>(<span class="ident">K</span>,<span class="ident">V</span>)<span class="op">></span>,
- }
- <span class="kw">impl</span><span class="op"><</span><span class="ident">K</span>:<span class="ident">Encodable</span>,<span class="ident">V</span>:<span class="ident">Encodable</span><span class="op">></span> <span class="ident">Encodable</span> <span class="kw">for</span> <span class="ident">SimpleMap</span><span class="op"><</span><span class="ident">K</span>,<span class="ident">V</span><span class="op">></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">s</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="ident">s</span>.<span class="ident">emit_map</span>(<span class="self">self</span>.<span class="ident">entries</span>.<span class="ident">len</span>(), <span class="op">|</span><span class="ident">s</span><span class="op">|</span> {
- <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">e</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">entries</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>() {
- <span class="kw">let</span> (<span class="kw-2">ref</span> <span class="ident">k</span>, <span class="kw-2">ref</span> <span class="ident">v</span>) <span class="op">=</span> <span class="kw-2">*</span><span class="ident">e</span>;
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_map_elt_key</span>(<span class="ident">i</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">k</span>.<span class="ident">encode</span>(<span class="ident">s</span>)));
- <span class="macro">try</span><span class="macro">!</span>(<span class="ident">s</span>.<span class="ident">emit_map_elt_val</span>(<span class="ident">i</span>, <span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">encode</span>(<span class="ident">s</span>)));
- }
- <span class="prelude-val">Ok</span>(())
- })
- }
- }</pre>
- </div><h3 id='tymethod.emit_map_elt_key' class='method'><span id='emit_map_elt_key.v' class='invisible'><code>fn <a href='#tymethod.emit_map_elt_key' class='fnname'>emit_map_elt_key</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit the key for an entry in a map.</p>
- <p>This should only be called from a function passed to <code>emit_map</code>.</p>
- <ul>
- <li><code>idx</code> is the (zero-based) index of the entry in the map</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the key.</li>
- </ul>
- <p>Note that map entries must be emitted in order - starting with index <code>0</code>
- and finishing with index <code>len-1</code> - and for each entry, the key should be
- emitted followed immediately by the value.</p>
- </div><h3 id='tymethod.emit_map_elt_val' class='method'><span id='emit_map_elt_val.v' class='invisible'><code>fn <a href='#tymethod.emit_map_elt_val' class='fnname'>emit_map_elt_val</a><F>(&mut self, idx: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, f: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Self::<a class="type" href="../rustc_serialize/trait.Encoder.html#associatedtype.Error" title="type rustc_serialize::Encoder::Error">Error</a>>, </span></code></span></h3><div class='docblock'><p>Emit the value for an entry in a map.</p>
- <p>This should only be called from a function passed to <code>emit_map</code>.</p>
- <ul>
- <li><code>idx</code> is the (zero-based) index of the entry in the map</li>
- <li><code>f</code> is a function that will call the appropriate emit method to encode
- the value.</li>
- </ul>
- <p>Note that map entries must be emitted in order - starting with index <code>0</code>
- and finishing with index <code>len-1</code> - and for each entry, the key should be
- emitted followed immediately by the value.</p>
- </div></div>
- <h2 id='implementors' class='small-section-header'>
- Implementors<a href='#implementors' class='anchor'></a>
- </h2>
- <ul class='item-list' id='implementors-list'>
- <li><table class='table-display'><tbody><tr><td><code>impl<'a> Encoder for <a class="struct" href="../rustc_serialize/json/struct.Encoder.html" title="struct rustc_serialize::json::Encoder">Encoder</a><'a><span class="where fmt-newline"> type <a href='#associatedtype.Error' class="type">Error</a> = <a class="enum" href="../rustc_serialize/json/enum.EncoderError.html" title="enum rustc_serialize::json::EncoderError">EncoderError</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../src/rustc_serialize/json.rs.html#622-928' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
- </ul><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
- src="../implementors/rustc_serialize/trait.Encoder.js">
- </script></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../";window.currentCrate = "rustc_serialize";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>
|
