106 lines
6.4 KiB
HTML
106 lines
6.4 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>标准库头文件 <execution></title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_header_execution skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <execution></h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-header.html">header</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<p>此头文件是<a href="cpp-algorithm.html">算法</a>库的一部分。</p>
|
|
<table class="t-dsc-begin">
|
|
<tr>
|
|
<td colspan="2">
|
|
<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
|
|
</td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-algorithm-is_execution_policy.html"><span class="t-lines"><span>is_execution_policy</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>测试一个类是否表示某种执行策略<br />
|
|
<span class="t-mark">(类模板)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc-header">
|
|
<td colspan="2">
|
|
<div>定义于命名空间 <code>std::execution</code></div>
|
|
</td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-algorithm-execution_policy_tag_t.html"><span class="t-lines"><span>sequenced_policy</span><span>parallel_policy</span><span>parallel_unsequenced_policy</span><span>unsequenced_policy</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>执行策略类型<br />
|
|
<span class="t-mark">(类)</span></td>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2">
|
|
<h3><span class="mw-headline" id=".E5.B8.B8.E9.87.8F">常量</span></h3>
|
|
</td>
|
|
</tr>
|
|
<tr class="t-dsc-header">
|
|
<td colspan="2">
|
|
<div>定义于命名空间 <code>std::execution</code></div>
|
|
</td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-algorithm-execution_policy_tag.html"><span class="t-lines"><span>seq</span><span>par</span><span>par_unseq</span><span>unseq</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>全局执行策略对象<br />
|
|
<span class="t-mark">(常量)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="co1">// 执行策略类型特征</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span> <span class="kw1">struct</span> is_execution_policy<span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> is_execution_policy_v <span class="sy1">=</span> is_execution_policy<span class="sy1"><</span>T<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span><span class="sy4">;</span>
|
|
<span class="br0">}</span>
|
|
|
|
<span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">execution</span> <span class="br0">{</span>
|
|
<span class="co1">// 顺序执行策略</span>
|
|
<span class="kw1">class</span> sequenced_policy<span class="sy4">;</span>
|
|
|
|
<span class="co1">// 并行执行策略</span>
|
|
<span class="kw1">class</span> parallel_policy<span class="sy4">;</span>
|
|
|
|
<span class="co1">// 并行及无序执行策略</span>
|
|
<span class="kw1">class</span> parallel_unsequenced_policy<span class="sy4">;</span>
|
|
|
|
<span class="co1">// 无序执行策略</span>
|
|
<span class="kw1">class</span> unsequenced_policy<span class="sy4">;</span>
|
|
|
|
<span class="co1">// 执行策略对象</span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> sequenced_policy seq<span class="br0">{</span> <span class="coMULTI">/* 未指明 */</span> <span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> parallel_policy par<span class="br0">{</span> <span class="coMULTI">/* 未指明 */</span> <span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> parallel_unsequenced_policy par_unseq<span class="br0">{</span> <span class="coMULTI">/* 未指明 */</span> <span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> unsequenced_policy unseq<span class="br0">{</span> <span class="coMULTI">/* 未指明 */</span> <span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|