181 lines
7.5 KiB
HTML
181 lines
7.5 KiB
HTML
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<!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 `want` crate.">
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<meta name="keywords" content="rust, rustlang, rust-lang, want">
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<title>want - 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" id="mainThemeStyle">
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<link rel="stylesheet" type="text/css" href="../dark.css">
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<link rel="stylesheet" type="text/css" href="../main.css" id="themeStyle">
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<script src="../storage.js"></script>
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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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<div class="sidebar-menu">☰</div>
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<p class='location'>Crate want</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'want', ty: 'mod', relpath: '../'};</script></div>
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</nav>
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<div class="theme-picker">
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<button id="theme-picker" aria-label="Pick another theme!">
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<img src="../brush.svg" width="18" alt="Pick another theme!">
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</button>
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<div id="theme-choices"></div>
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</div>
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<script src="../theme.js"></script>
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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=''>want</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/want/lib.rs.html#1-493' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>A Futures channel-like utility to signal when a value is wanted.</p>
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<p>Futures are supposed to be lazy, and only starting work if <code>Future::poll</code>
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is called. The same is true of <code>Stream</code>s, but when using a channel as
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a <code>Stream</code>, it can be hard to know if the receiver is ready for the next
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value.</p>
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<p>Put another way, given a <code>(tx, rx)</code> from <code>futures::sync::mpsc::channel()</code>,
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how can the sender (<code>tx</code>) know when the receiver (<code>rx</code>) actually wants more
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work to be produced? Just because there is room in the channel buffer
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doesn't mean the work would be used by the receiver.</p>
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<p>This is where something like <code>want</code> comes in. Added to a channel, you can
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make sure that the <code>tx</code> only creates the message and sends it when the <code>rx</code>
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has <code>poll()</code> for it, and the buffer was empty.</p>
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</div><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.Closed.html"
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title='struct want::Closed'>Closed</a></td>
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<td class='docblock-short'>
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<p>The <code>Taker</code> has canceled its interest in a value.</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.Giver.html"
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title='struct want::Giver'>Giver</a></td>
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<td class='docblock-short'>
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<p>An entity that gives a value when wanted.</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.SharedGiver.html"
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title='struct want::SharedGiver'>SharedGiver</a></td>
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<td class='docblock-short'>
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<p>A cloneable <code>Giver</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.Taker.html"
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title='struct want::Taker'>Taker</a></td>
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<td class='docblock-short'>
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<p>An entity that wants a value.</p>
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</td>
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</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="fn" href="fn.new.html"
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title='fn want::new'>new</a></td>
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<td class='docblock-short'>
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<p>Create a new <code>want</code> channel.</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><kbd>?</kbd></dt>
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<dd>Show this help dialog</dd>
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<dt><kbd>S</kbd></dt>
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<dd>Focus the search field</dd>
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<dt><kbd>↑</kbd></dt>
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<dd>Move up in search results</dd>
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<dt><kbd>↓</kbd></dt>
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<dd>Move down in search results</dd>
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<dt><kbd>↹</kbd></dt>
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<dd>Switch tab</dd>
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<dt><kbd>⏎</kbd></dt>
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<dd>Go to active search result</dd>
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<dt><kbd>+</kbd></dt>
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<dd>Expand all sections</dd>
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<dt><kbd>-</kbd></dt>
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<dd>Collapse 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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|||
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window.currentCrate = "want";
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|||
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</script>
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|||
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<script src="../main.js"></script>
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|||
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<script defer src="../search-index.js"></script>
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|||
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</body>
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|||
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</html>
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