struct.BindingInfo.html 22 KB

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  25. <p class='location'>Struct BindingInfo</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#fields">Fields</a><div class="sidebar-links"><a href="#structfield.binding">binding</a><a href="#structfield.style">style</a></div><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.ast">ast</a><a href="#method.pat">pat</a><a href="#method.referenced_ty_params">referenced_ty_params</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Clone">Clone</a><a href="#impl-PartialEq">PartialEq</a><a href="#impl-Eq">Eq</a><a href="#impl-Hash">Hash</a><a href="#impl-ToTokens">ToTokens</a></div></div><p class='location'><a href='index.html'>synstructure</a></p><script>window.sidebarCurrent = {name: 'BindingInfo', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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  45. <h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>synstructure</a>::<wbr><a class="struct" href=''>BindingInfo</a></span><span class='out-of-band'><span id='render-detail'>
  46. <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
  47. [<span class='inner'>&#x2212;</span>]
  48. </a>
  49. </span><a class='srclink' href='../src/synstructure/lib.rs.html#213-225' title='goto source code'>[src]</a></span></h1>
  50. <pre class='rust struct'>pub struct BindingInfo&lt;'a&gt; {
  51. pub binding: <a class="struct" href="../syn/ident/struct.Ident.html" title="struct syn::ident::Ident">Ident</a>,
  52. pub style: <a class="enum" href="../synstructure/enum.BindStyle.html" title="enum synstructure::BindStyle">BindStyle</a>,
  53. // some fields omitted
  54. }</pre><div class='docblock'><p>Information about a specific binding. This contains both an <code>Ident</code>
  55. reference to the given field, and the syn <code>&amp;'a Field</code> descriptor for that
  56. field.</p>
  57. <p>This type supports <code>quote::ToTokens</code>, so can be directly used within the
  58. <code>quote!</code> macro. It expands to a reference to the matched field.</p>
  59. </div><h2 id='fields' class='fields small-section-header'>
  60. Fields<a href='#fields' class='anchor'></a></h2><span id="structfield.binding" class="structfield small-section-header">
  61. <a href="#structfield.binding" class="anchor field"></a>
  62. <span id="binding.v" class='invisible'>
  63. <code>binding: <a class="struct" href="../syn/ident/struct.Ident.html" title="struct syn::ident::Ident">Ident</a></code>
  64. </span></span><div class='docblock'><p>The name which this BindingInfo will bind to.</p>
  65. </div><span id="structfield.style" class="structfield small-section-header">
  66. <a href="#structfield.style" class="anchor field"></a>
  67. <span id="style.v" class='invisible'>
  68. <code>style: <a class="enum" href="../synstructure/enum.BindStyle.html" title="enum synstructure::BindStyle">BindStyle</a></code>
  69. </span></span><div class='docblock'><p>The type of binding which this BindingInfo will create.</p>
  70. </div>
  71. <h2 id='methods' class='small-section-header'>
  72. Methods<a href='#methods' class='anchor'></a>
  73. </h2>
  74. <h3 id='impl' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#233-307' title='goto source code'>[src]</a></span></h3>
  75. <div class='impl-items'><h4 id='method.ast' class="method"><span id='ast.v' class='invisible'><code>pub fn <a href='#method.ast' class='fnname'>ast</a>(&amp;self) -&gt; &amp;'a <a class="struct" href="../syn/data/struct.Field.html" title="struct syn::data::Field">Field</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#236-238' title='goto source code'>[src]</a></span></h4>
  76. <div class='docblock'><p>Returns a reference to the underlying <code>syn</code> AST node which this
  77. <code>BindingInfo</code> references</p>
  78. </div><h4 id='method.pat' class="method"><span id='pat.v' class='invisible'><code>pub fn <a href='#method.pat' class='fnname'>pat</a>(&amp;self) -&gt; <a class="struct" href="../quote/tokens/struct.Tokens.html" title="struct quote::tokens::Tokens">Tokens</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#265-272' title='goto source code'>[src]</a></span></h4>
  79. <div class='docblock'><p>Generates the pattern fragment for this field binding.</p>
  80. <h1 id="example" class="section-header"><a href="#example">Example</a></h1>
  81. <pre class="rust rust-example-rendered">
  82. <span class="kw">let</span> <span class="ident">di</span> <span class="op">=</span> <span class="ident">syn</span>::<span class="ident">parse_derive_input</span>(<span class="string">r#&quot;
  83. enum A {
  84. B{ a: i32, b: i32 },
  85. C(u32),
  86. }
  87. &quot;#</span>).<span class="ident">unwrap</span>();
  88. <span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">Structure</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">di</span>);
  89. <span class="macro">assert_eq</span><span class="macro">!</span>(
  90. <span class="ident">s</span>.<span class="ident">variants</span>()[<span class="number">0</span>].<span class="ident">bindings</span>()[<span class="number">0</span>].<span class="ident">pat</span>(),
  91. <span class="macro">quote</span><span class="macro">!</span>{
  92. <span class="kw-2">ref</span> <span class="ident">__binding_0</span>
  93. }
  94. );</pre>
  95. </div><h4 id='method.referenced_ty_params' class="method"><span id='referenced_ty_params.v' class='invisible'><code>pub fn <a href='#method.referenced_ty_params' class='fnname'>referenced_ty_params</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;&amp;'a <a class="struct" href="../syn/ident/struct.Ident.html" title="struct syn::ident::Ident">Ident</a>&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#304-306' title='goto source code'>[src]</a></span></h4>
  96. <div class='docblock'><p>Returns a list of the type parameters which are referenced in this
  97. field's type.</p>
  98. <h1 id="caveat" class="section-header"><a href="#caveat">Caveat</a></h1>
  99. <p>If the field contains any macros in type position, all parameters will
  100. be considered bound. This is because we cannot determine which type
  101. parameters are bound by type macros.</p>
  102. <h1 id="example-1" class="section-header"><a href="#example-1">Example</a></h1>
  103. <pre class="rust rust-example-rendered">
  104. <span class="kw">let</span> <span class="ident">di</span> <span class="op">=</span> <span class="ident">syn</span>::<span class="ident">parse_derive_input</span>(<span class="string">r#&quot;
  105. struct A&lt;T, U&gt; {
  106. a: Option&lt;T&gt;,
  107. b: U,
  108. }
  109. &quot;#</span>).<span class="ident">unwrap</span>();
  110. <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">Structure</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">di</span>);
  111. <span class="macro">assert_eq</span><span class="macro">!</span>(
  112. <span class="ident">s</span>.<span class="ident">variants</span>()[<span class="number">0</span>].<span class="ident">bindings</span>()[<span class="number">0</span>].<span class="ident">referenced_ty_params</span>(),
  113. <span class="kw-2">&amp;</span>[<span class="kw-2">&amp;</span>(<span class="ident">syn</span>::<span class="ident">Ident</span>::<span class="ident">from</span>(<span class="string">&quot;T&quot;</span>))]
  114. );</pre>
  115. </div></div>
  116. <h2 id='implementations' class='small-section-header'>
  117. Trait Implementations<a href='#implementations' class='anchor'></a>
  118. </h2>
  119. <h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h3>
  120. <div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, __arg_0: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h4>
  121. <div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
  122. </div></div><h3 id='impl-Clone' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-Clone' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h3>
  123. <div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h4>
  124. <div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
  125. </div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code></span><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#112-114' title='goto source code'>[src]</a></span></h4>
  126. <div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
  127. </div></div><h3 id='impl-PartialEq' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-PartialEq' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h3>
  128. <div class='impl-items'><h4 id='method.eq' class="method"><span id='eq.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq' class='fnname'>eq</a>(&amp;self, __arg_0: &amp;<a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h4>
  129. <div class='docblock'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></p>
  130. </div><h4 id='method.ne' class="method"><span id='ne.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#method.ne' class='fnname'>ne</a>(&amp;self, __arg_0: &amp;<a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h4>
  131. <div class='docblock'><p>This method tests for <code>!=</code>.</p>
  132. </div></div><h3 id='impl-Eq' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-Eq' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h3>
  133. <div class='impl-items'></div><h3 id='impl-Hash' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-Hash' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h3>
  134. <div class='impl-items'><h4 id='method.hash' class="method"><span id='hash.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html#tymethod.hash' class='fnname'>hash</a>&lt;__H:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>&gt;(&amp;self, __arg_0: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>__H)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#212' title='goto source code'>[src]</a></span></h4>
  135. <div class='docblock'><p>Feeds this value into the given [<code>Hasher</code>]. <a href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html#tymethod.hash">Read more</a></p>
  136. </div><h4 id='method.hash_slice' class="method"><span id='hash_slice.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html#method.hash_slice' class='fnname'>hash_slice</a>&lt;H&gt;(data: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[Self]</a>, state: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>H) <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;H: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hasher.html" title="trait core::hash::Hasher">Hasher</a>,&nbsp;</span></code></span><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.3.0'>1.3.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/hash/mod.rs.html#202-208' title='goto source code'>[src]</a></span></h4>
  137. <div class='docblock'><p>Feeds a slice of this type into the given [<code>Hasher</code>]. <a href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html#method.hash_slice">Read more</a></p>
  138. </div></div><h3 id='impl-ToTokens' class='impl'><span class='in-band'><code>impl&lt;'a&gt; <a class="trait" href="../quote/to_tokens/trait.ToTokens.html" title="trait quote::to_tokens::ToTokens">ToTokens</a> for <a class="struct" href="../synstructure/struct.BindingInfo.html" title="struct synstructure::BindingInfo">BindingInfo</a>&lt;'a&gt;</code><a href='#impl-ToTokens' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#227-231' title='goto source code'>[src]</a></span></h3>
  139. <div class='impl-items'><h4 id='method.to_tokens' class="method"><span id='to_tokens.v' class='invisible'><code>fn <a href='../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens' class='fnname'>to_tokens</a>(&amp;self, tokens: &amp;mut <a class="struct" href="../quote/tokens/struct.Tokens.html" title="struct quote::tokens::Tokens">Tokens</a>)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/synstructure/lib.rs.html#228-230' title='goto source code'>[src]</a></span></h4>
  140. <div class='docblock'><p>Write <code>self</code> to the given <code>Tokens</code>. <a href="../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens">Read more</a></p>
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  177. <code>trait</code>, <code>type</code>, <code>macro</code>,
  178. and <code>const</code>.
  179. </p>
  180. <p>
  181. Search functions by type signature (e.g.
  182. <code>vec -> usize</code> or <code>* -> vec</code>)
  183. </p>
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