mitchellhansen
/
Trac3r-rust
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'da836f318e'
${ noResults }
Trac3r-rust/doc/smallvec/macro.smallvec.html

34 lines
7.5 KiB
Raw Normal View History Unescape

add doc
5 years ago
<!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 `smallvec` macro in crate `smallvec`."><meta name="keywords" content="rust, rustlang, rust-lang, smallvec"><title>smallvec::smallvec - 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><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><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">&#9776;</div><a href='../smallvec/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='index.html'>smallvec</a></p><script>window.sidebarCurrent = {name: 'smallvec', 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!"><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"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><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'>&#x2212;</span>]</a></span><a class='srclink' href='../src/smallvec/lib.rs.html#113-129' title='goto source code'>[src]</a></span><span class='in-band'>Macro <a href='index.html'>smallvec</a>::<wbr><a class="macro" href=''>smallvec</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">smallvec</span> {
(@<span class="ident">one</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">x</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">&gt;</span> { ... };
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">elem</span>:<span class="ident">expr</span>; <span class="macro-nonterminal">$</span><span class="macro-nonterminal">n</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">&gt;</span> { ... };
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">x</span>:<span class="ident">expr</span>),<span class="kw-2">*</span>$(,)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">&gt;</span> { ... };
}</pre></div>
</div><div class='docblock'><p>Creates a [<code>SmallVec</code>] containing the arguments.</p>
<p><code>smallvec!</code> allows <code>SmallVec</code>s to be defined with the same syntax as array expressions.
There are two forms of this macro:</p>
<ul>
<li>Create a [<code>SmallVec</code>] containing a given list of elements:</li>
</ul>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">SmallVec</span><span class="op">&lt;</span>[<span class="kw">_</span>; <span class="number">128</span>]<span class="op">&gt;</span> <span class="op">=</span> <span class="macro">smallvec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>[<span class="number">0</span>], <span class="number">1</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>[<span class="number">1</span>], <span class="number">2</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>[<span class="number">2</span>], <span class="number">3</span>);</pre></div>
<ul>
<li>Create a [<code>SmallVec</code>] from a given element and size:</li>
</ul>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">SmallVec</span><span class="op">&lt;</span>[<span class="kw">_</span>; <span class="number">0x8000</span>]<span class="op">&gt;</span> <span class="op">=</span> <span class="macro">smallvec</span><span class="macro">!</span>[<span class="number">1</span>; <span class="number">3</span>];
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="ident">SmallVec</span>::<span class="ident">from_buf</span>([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>]));</pre></div>
<p>Note that unlike array expressions this syntax supports all elements
which implement [<code>Clone</code>] and the number of elements doesn't have to be
a constant.</p>
<p>This will use <code>clone</code> to duplicate an expression, so one should be careful
using this with types having a nonstandard <code>Clone</code> implementation. For
example, <code>smallvec![Rc::new(1); 5]</code> will create a vector of five references
to the same boxed integer value, not five references pointing to independently
boxed integers.</p>
</div></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>&#9166;</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 = "smallvec";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>