mirror of
https://github.com/trussed-dev/flexiber.git
synced 2026-03-11 16:35:17 -07:00
35 lines
6.7 KiB
HTML
35 lines
6.7 KiB
HTML
<!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 `test_derive` macro in crate `synstructure`."><meta name="keywords" content="rust, rustlang, rust-lang, test_derive"><title>synstructure::test_derive - 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="../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 macro"><!--[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='../synstructure/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class="location"><a href="index.html">synstructure</a></p><script>window.sidebarCurrent = {name: "test_derive", ty: "macro", relpath: ""};</script><script defer src="sidebar-items.js"></script></div></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><button type="button" class="help-button">?</button>
|
||
<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="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/synstructure/macros.rs.html#197-250" title="goto source code">[src]</a></span><span class="in-band">Macro <a href="index.html">synstructure</a>::<wbr><a class="macro" href="">test_derive</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><div class="example-wrap"><pre class="rust macro">
|
||
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_derive</span> {
|
||
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">path</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">tt</span>)<span class="op">*</span> } <span class="ident">expands</span> <span class="ident">to</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">o</span>:<span class="ident">tt</span>)<span class="op">*</span> }) <span class="op">=</span><span class="op">></span> { ... };
|
||
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">path</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">tt</span>)<span class="op">*</span> } <span class="ident">expands</span> <span class="ident">to</span> { $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">o</span>:<span class="ident">tt</span>)<span class="op">*</span> } <span class="ident">no_build</span>) <span class="op">=</span><span class="op">></span> { ... };
|
||
}</pre></div>
|
||
</div><div class="docblock"><p>Run a test on a custom derive. This macro expands both the original struct
|
||
and the expansion to ensure that they compile correctly, and confirms that
|
||
feeding the original struct into the named derive will produce the written
|
||
output.</p>
|
||
<p>You can add <code>no_build</code> to the end of the macro invocation to disable
|
||
checking that the written code compiles. This is useful in contexts where
|
||
the procedural macro cannot depend on the crate where it is used during
|
||
tests.</p>
|
||
<h1 id="usage" class="section-header"><a href="#usage">Usage</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">test_derive_example</span>(<span class="ident">_s</span>: <span class="ident">synstructure</span>::<span class="ident">Structure</span>)
|
||
<span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">proc_macro2</span>::<span class="ident">TokenStream</span>, <span class="ident">syn</span>::<span class="ident">Error</span><span class="op">></span>
|
||
{
|
||
<span class="prelude-val">Ok</span>(<span class="ident">quote</span>::<span class="macro">quote</span><span class="macro">!</span> { <span class="kw">const</span> <span class="ident">YOUR_OUTPUT</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"here"</span>; })
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">main</span>() {
|
||
<span class="ident">synstructure</span>::<span class="macro">test_derive</span><span class="macro">!</span>{
|
||
<span class="ident">test_derive_example</span> {
|
||
<span class="kw">struct</span> <span class="ident">A</span>;
|
||
}
|
||
<span class="ident">expands</span> <span class="ident">to</span> {
|
||
<span class="kw">const</span> <span class="ident">YOUR_OUTPUT</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"here"</span>;
|
||
}
|
||
}
|
||
}</pre></div>
|
||
</div></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../";window.currentCrate = "synstructure";</script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html> |