214 lines
8.8 KiB
HTML
214 lines
8.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="rustdoc">
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<meta name="description" content="API documentation for the Rust `quote` crate.">
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<meta name="keywords" content="rust, rustlang, rust-lang, quote">
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<title>quote - Rust</title>
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<link rel="stylesheet" type="text/css" href="../normalize.css">
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<link rel="stylesheet" type="text/css" href="../rustdoc.css">
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<link rel="stylesheet" type="text/css" href="../main.css">
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</head>
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<body class="rustdoc mod">
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<!--[if lte IE 8]>
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<div class="warning">
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This old browser is unsupported and will most likely display funky
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things.
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</div>
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<![endif]-->
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<nav class="sidebar">
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<p class='location'>Crate quote</p><div class="block items"><ul><li><a href="#macros">Macros</a></li><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'quote', ty: 'mod', relpath: '../'};</script>
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</nav>
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<nav class="sub">
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<form class="search-form js-only">
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<div class="search-container">
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<input class="search-input" name="search"
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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</div>
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</form>
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</nav>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>quote</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../src/quote/lib.rs.html#1-252' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>Quasi-quoting without a Syntex dependency, intended for use with <a href="https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md">Macros
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1.1</a>.</p>
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<pre><code class="language-toml">[dependencies]
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quote = "0.3"
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</code></pre>
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<pre class="rust rust-example-rendered">
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<span class="attribute">#[<span class="ident">macro_use</span>]</span>
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">quote</span>;</pre>
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<p>Interpolation is done with <code>#var</code>:</p>
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<pre><code class="language-text">let tokens = quote! {
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struct SerializeWith #generics #where_clause {
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value: &'a #field_ty,
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phantom: ::std::marker::PhantomData<#item_ty>,
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}
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impl #generics serde::Serialize for SerializeWith #generics #where_clause {
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fn serialize<S>(&self, s: &mut S) -> Result<(), S::Error>
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where S: serde::Serializer
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{
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#path(self.value, s)
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}
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}
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SerializeWith {
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value: #value,
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phantom: ::std::marker::PhantomData::<#item_ty>,
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}
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};
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</code></pre>
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<p>Repetition is done using <code>#(...)*</code> or <code>#(...),*</code> very similar to <code>macro_rules!</code>:</p>
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<ul>
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<li><code>#(#var)*</code> - no separators</li>
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<li><code>#(#var),*</code> - the character before the asterisk is used as a separator</li>
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<li><code>#( struct #var; )*</code> - the repetition can contain other things</li>
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<li><code>#( #k => println!("{}", #v), )*</code> - even multiple interpolations</li>
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</ul>
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<p>The return type of <code>quote!</code> is <code>quote::Tokens</code>. Tokens can be interpolated into
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other quotes:</p>
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<pre><code class="language-text">let t = quote! { /* ... */ };
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return quote! { /* ... */ #t /* ... */ };
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</code></pre>
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<p>Call <code>to_string()</code> or <code>as_str()</code> on a Tokens to get a <code>String</code> or <code>&str</code> of Rust
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code.</p>
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<p>The <code>quote!</code> macro relies on deep recursion so some large invocations may fail
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with "recursion limit reached" when you compile. If it fails, bump up the
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recursion limit by adding <code>#![recursion_limit = "128"]</code> to your crate. An even
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higher limit may be necessary for especially large invocations.</p>
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</div><h2 id='macros' class='section-header'><a href="#macros">Macros</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="macro" href="macro.quote.html"
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title='macro quote::quote'>quote</a></td>
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<td class='docblock-short'>
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<p>The whole point.</p>
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</td>
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</tr></table><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.ByteStr.html"
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title='struct quote::ByteStr'>ByteStr</a></td>
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<td class='docblock-short'>
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<p>Wrap a <code>&str</code> so it interpolates as a byte-string: <code>b"abc"</code>.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.Hex.html"
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title='struct quote::Hex'>Hex</a></td>
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<td class='docblock-short'>
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<p>Wrap an integer so it interpolates as a hexadecimal.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.Ident.html"
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title='struct quote::Ident'>Ident</a></td>
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<td class='docblock-short'>
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<p>An identifier that should be interpolated without quotes.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.Tokens.html"
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title='struct quote::Tokens'>Tokens</a></td>
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<td class='docblock-short'>
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<p>Tokens produced by a <code>quote!(...)</code> invocation.</p>
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</td>
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</tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.ToTokens.html"
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title='trait quote::ToTokens'>ToTokens</a></td>
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<td class='docblock-short'>
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<p>Types that can be interpolated inside a <code>quote!(...)</code> invocation.</p>
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</td>
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</tr></table></section>
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<section id='search' class="content hidden"></section>
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<section class="footer"></section>
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<aside id="help" class="hidden">
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<div>
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<h1 class="hidden">Help</h1>
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<div class="shortcuts">
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<h2>Keyboard Shortcuts</h2>
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<dl>
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<dt>?</dt>
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<dd>Show this help dialog</dd>
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<dt>S</dt>
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<dd>Focus the search field</dd>
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<dt>⇤</dt>
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<dd>Move up in search results</dd>
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<dt>⇥</dt>
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<dd>Move down in search results</dd>
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<dt>⏎</dt>
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<dd>Go to active search result</dd>
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<dt>+</dt>
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<dd>Collapse/expand all sections</dd>
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</dl>
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</div>
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<div class="infos">
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<h2>Search Tricks</h2>
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<p>
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Prefix searches with a type followed by a colon (e.g.
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<code>fn:</code>) to restrict the search to a given type.
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</p>
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<p>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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<code>struct</code>, <code>enum</code>,
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<code>trait</code>, <code>type</code>, <code>macro</code>,
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and <code>const</code>.
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</p>
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<p>
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Search functions by type signature (e.g.
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<code>vec -> usize</code> or <code>* -> vec</code>)
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</p>
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</div>
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</div>
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</aside>
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<script>
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window.rootPath = "../";
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window.currentCrate = "quote";
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</script>
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<script src="../main.js"></script>
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<script defer src="../search-index.js"></script>
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</body>
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</html> |