<!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="Source of the Rust file `/home/eli/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.57/src/custom_keyword.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>custom_keyword.rs - source</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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
<link rel="alternate icon" type="image/png" href="../../favicon-16x16.png">
<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[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='../../syn/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><span class="help-button">?</span>
<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"><pre class="line-numbers"><span id="1"> 1</span>
<span id="2"> 2</span>
<span id="3"> 3</span>
<span id="4"> 4</span>
<span id="5"> 5</span>
<span id="6"> 6</span>
<span id="7"> 7</span>
<span id="8"> 8</span>
<span id="9"> 9</span>
<span id="10"> 10</span>
<span id="11"> 11</span>
<span id="12"> 12</span>
<span id="13"> 13</span>
<span id="14"> 14</span>
<span id="15"> 15</span>
<span id="16"> 16</span>
<span id="17"> 17</span>
<span id="18"> 18</span>
<span id="19"> 19</span>
<span id="20"> 20</span>
<span id="21"> 21</span>
<span id="22"> 22</span>
<span id="23"> 23</span>
<span id="24"> 24</span>
<span id="25"> 25</span>
<span id="26"> 26</span>
<span id="27"> 27</span>
<span id="28"> 28</span>
<span id="29"> 29</span>
<span id="30"> 30</span>
<span id="31"> 31</span>
<span id="32"> 32</span>
<span id="33"> 33</span>
<span id="34"> 34</span>
<span id="35"> 35</span>
<span id="36"> 36</span>
<span id="37"> 37</span>
<span id="38"> 38</span>
<span id="39"> 39</span>
<span id="40"> 40</span>
<span id="41"> 41</span>
<span id="42"> 42</span>
<span id="43"> 43</span>
<span id="44"> 44</span>
<span id="45"> 45</span>
<span id="46"> 46</span>
<span id="47"> 47</span>
<span id="48"> 48</span>
<span id="49"> 49</span>
<span id="50"> 50</span>
<span id="51"> 51</span>
<span id="52"> 52</span>
<span id="53"> 53</span>
<span id="54"> 54</span>
<span id="55"> 55</span>
<span id="56"> 56</span>
<span id="57"> 57</span>
<span id="58"> 58</span>
<span id="59"> 59</span>
<span id="60"> 60</span>
<span id="61"> 61</span>
<span id="62"> 62</span>
<span id="63"> 63</span>
<span id="64"> 64</span>
<span id="65"> 65</span>
<span id="66"> 66</span>
<span id="67"> 67</span>
<span id="68"> 68</span>
<span id="69"> 69</span>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
<span id="137">137</span>
<span id="138">138</span>
<span id="139">139</span>
<span id="140">140</span>
<span id="141">141</span>
<span id="142">142</span>
<span id="143">143</span>
<span id="144">144</span>
<span id="145">145</span>
<span id="146">146</span>
<span id="147">147</span>
<span id="148">148</span>
<span id="149">149</span>
<span id="150">150</span>
<span id="151">151</span>
<span id="152">152</span>
<span id="153">153</span>
<span id="154">154</span>
<span id="155">155</span>
<span id="156">156</span>
<span id="157">157</span>
<span id="158">158</span>
<span id="159">159</span>
<span id="160">160</span>
<span id="161">161</span>
<span id="162">162</span>
<span id="163">163</span>
<span id="164">164</span>
<span id="165">165</span>
<span id="166">166</span>
<span id="167">167</span>
<span id="168">168</span>
<span id="169">169</span>
<span id="170">170</span>
<span id="171">171</span>
<span id="172">172</span>
<span id="173">173</span>
<span id="174">174</span>
<span id="175">175</span>
<span id="176">176</span>
<span id="177">177</span>
<span id="178">178</span>
<span id="179">179</span>
<span id="180">180</span>
<span id="181">181</span>
<span id="182">182</span>
<span id="183">183</span>
<span id="184">184</span>
<span id="185">185</span>
<span id="186">186</span>
<span id="187">187</span>
<span id="188">188</span>
<span id="189">189</span>
<span id="190">190</span>
<span id="191">191</span>
<span id="192">192</span>
<span id="193">193</span>
<span id="194">194</span>
<span id="195">195</span>
<span id="196">196</span>
<span id="197">197</span>
<span id="198">198</span>
<span id="199">199</span>
<span id="200">200</span>
<span id="201">201</span>
<span id="202">202</span>
<span id="203">203</span>
<span id="204">204</span>
<span id="205">205</span>
<span id="206">206</span>
<span id="207">207</span>
<span id="208">208</span>
<span id="209">209</span>
<span id="210">210</span>
<span id="211">211</span>
<span id="212">212</span>
<span id="213">213</span>
<span id="214">214</span>
<span id="215">215</span>
<span id="216">216</span>
<span id="217">217</span>
<span id="218">218</span>
<span id="219">219</span>
<span id="220">220</span>
<span id="221">221</span>
<span id="222">222</span>
<span id="223">223</span>
<span id="224">224</span>
<span id="225">225</span>
<span id="226">226</span>
<span id="227">227</span>
<span id="228">228</span>
<span id="229">229</span>
<span id="230">230</span>
<span id="231">231</span>
<span id="232">232</span>
<span id="233">233</span>
<span id="234">234</span>
<span id="235">235</span>
<span id="236">236</span>
<span id="237">237</span>
<span id="238">238</span>
<span id="239">239</span>
<span id="240">240</span>
<span id="241">241</span>
<span id="242">242</span>
<span id="243">243</span>
<span id="244">244</span>
<span id="245">245</span>
<span id="246">246</span>
<span id="247">247</span>
<span id="248">248</span>
<span id="249">249</span>
<span id="250">250</span>
<span id="251">251</span>
<span id="252">252</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">/// Define a type that supports parsing and printing a given identifier as if it</span>
<span class="doccomment">/// were a keyword.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Usage</span>
<span class="doccomment">///</span>
<span class="doccomment">/// As a convention, it is recommended that this macro be invoked within a</span>
<span class="doccomment">/// module called `kw` or `keyword` and that the resulting parser be invoked</span>
<span class="doccomment">/// with a `kw::` or `keyword::` prefix.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// mod kw {</span>
<span class="doccomment">/// syn::custom_keyword!(whatever);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The generated syntax tree node supports the following operations just like</span>
<span class="doccomment">/// any built-in keyword token.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - [Peeking] — `input.peek(kw::whatever)`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - [Parsing] — `input.parse::<kw::whatever>()?`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - [Printing] — `quote!( ... #whatever_token ... )`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - Construction from a [`Span`] — `let whatever_token = kw::whatever(sp)`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - Field access to its span — `let sp = whatever_token.span`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [Peeking]: crate::parse::ParseBuffer::peek</span>
<span class="doccomment">/// [Parsing]: crate::parse::ParseBuffer::parse</span>
<span class="doccomment">/// [Printing]: quote::ToTokens</span>
<span class="doccomment">/// [`Span`]: proc_macro2::Span</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This example parses input that looks like `bool = true` or `str = "value"`.</span>
<span class="doccomment">/// The key must be either the identifier `bool` or the identifier `str`. If</span>
<span class="doccomment">/// `bool`, the value may be either `true` or `false`. If `str`, the value may</span>
<span class="doccomment">/// be any string literal.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The symbols `bool` and `str` are not reserved keywords in Rust so these are</span>
<span class="doccomment">/// not considered keywords in the `syn::token` module. Like any other</span>
<span class="doccomment">/// identifier that is not a keyword, these can be declared as custom keywords</span>
<span class="doccomment">/// by crates that need to use them as such.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use syn::{LitBool, LitStr, Result, Token};</span>
<span class="doccomment">/// use syn::parse::{Parse, ParseStream};</span>
<span class="doccomment">///</span>
<span class="doccomment">/// mod kw {</span>
<span class="doccomment">/// syn::custom_keyword!(bool);</span>
<span class="doccomment">/// syn::custom_keyword!(str);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// enum Argument {</span>
<span class="doccomment">/// Bool {</span>
<span class="doccomment">/// bool_token: kw::bool,</span>
<span class="doccomment">/// eq_token: Token![=],</span>
<span class="doccomment">/// value: LitBool,</span>
<span class="doccomment">/// },</span>
<span class="doccomment">/// Str {</span>
<span class="doccomment">/// str_token: kw::str,</span>
<span class="doccomment">/// eq_token: Token![=],</span>
<span class="doccomment">/// value: LitStr,</span>
<span class="doccomment">/// },</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// impl Parse for Argument {</span>
<span class="doccomment">/// fn parse(input: ParseStream) -> Result<Self> {</span>
<span class="doccomment">/// let lookahead = input.lookahead1();</span>
<span class="doccomment">/// if lookahead.peek(kw::bool) {</span>
<span class="doccomment">/// Ok(Argument::Bool {</span>
<span class="doccomment">/// bool_token: input.parse::<kw::bool>()?,</span>
<span class="doccomment">/// eq_token: input.parse()?,</span>
<span class="doccomment">/// value: input.parse()?,</span>
<span class="doccomment">/// })</span>
<span class="doccomment">/// } else if lookahead.peek(kw::str) {</span>
<span class="doccomment">/// Ok(Argument::Str {</span>
<span class="doccomment">/// str_token: input.parse::<kw::str>()?,</span>
<span class="doccomment">/// eq_token: input.parse()?,</span>
<span class="doccomment">/// value: input.parse()?,</span>
<span class="doccomment">/// })</span>
<span class="doccomment">/// } else {</span>
<span class="doccomment">/// Err(lookahead.error())</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_camel_case_types</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">pub</span> <span class="ident">span</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Span</span>,
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>, <span class="ident">non_snake_case</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span><span class="op"><</span><span class="ident">__S</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">IntoSpans</span><span class="op"><</span>[<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Span</span>; <span class="number">1</span>]<span class="op">></span><span class="op">></span>(
<span class="ident">span</span>: <span class="ident">__S</span>,
) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="ident">span</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">IntoSpans</span>::<span class="ident">into_spans</span>(<span class="ident">span</span>)[<span class="number">0</span>],
}
}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Default</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="ident">span</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Span</span>::<span class="ident">call_site</span>(),
}
}
}
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro">impl_parse_for_custom_keyword</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>);
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro">impl_to_tokens_for_custom_keyword</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>);
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro">impl_clone_for_custom_keyword</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>);
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro">impl_extra_traits_for_custom_keyword</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>);
};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_parse_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {
<span class="comment">// For peek.</span>
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">token</span>::<span class="ident">CustomToken</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">buffer</span>::<span class="ident">Cursor</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">bool</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">_rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() {
<span class="ident">ident</span> <span class="op">=</span><span class="op">=</span> <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>)
} <span class="kw">else</span> {
<span class="bool-val">false</span>
}
}
<span class="kw">fn</span> <span class="ident">display</span>() <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">str</span> {
<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"`"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>), <span class="string">"`"</span>)
}
}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">parse</span>::<span class="ident">Parse</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">parse</span>::<span class="ident">ParseStream</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">parse</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span><span class="op">></span> {
<span class="ident">input</span>.<span class="ident">step</span>(<span class="op">|</span><span class="ident">cursor</span><span class="op">|</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() {
<span class="kw">if</span> <span class="ident">ident</span> <span class="op">=</span><span class="op">=</span> <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>) {
<span class="kw">return</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="prelude-val">Ok</span>((<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> { <span class="ident">span</span>: <span class="ident">ident</span>.<span class="ident">span</span>() }, <span class="ident">rest</span>));
}
}
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="prelude-val">Err</span>(<span class="ident">cursor</span>.<span class="ident">error</span>(<span class="macro">concat</span><span class="macro">!</span>(
<span class="string">"expected `"</span>,
<span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>),
<span class="string">"`"</span>
)))
})
}
}
};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>))]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_parse_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_to_tokens_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">TokenStream2</span>) {
<span class="kw">let</span> <span class="ident">ident</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">Ident</span>::<span class="ident">new</span>(<span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>), <span class="self">self</span>.<span class="ident">span</span>);
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">TokenStreamExt</span>::<span class="ident">append</span>(<span class="ident">tokens</span>, <span class="ident">ident</span>);
}
}
};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>))]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_to_tokens_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_clone_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="kw-2">*</span><span class="self">self</span>
}
}
};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>))]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_clone_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_extra_traits_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Formatter</span>::<span class="ident">write_str</span>(
<span class="ident">f</span>,
<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"Keyword ["</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>), <span class="string">"]"</span>),
)
}
}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Eq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">PartialEq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">bool</span> {
<span class="bool-val">true</span>
}
}
<span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Hash</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span> {
<span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">__H</span>: <span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">export</span>::<span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_state</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">__H</span>) {}
}
};
}
<span class="comment">// Not public API.</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>))]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">impl_extra_traits_for_custom_keyword</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">ident</span>:<span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> {};
}
</pre></div>
</section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../";window.currentCrate = "syn";</script><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script><script defer src="../../search-index.js"></script></body></html>