86 lines
4.7 KiB
HTML
86 lines
4.7 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>C++ 标准库扩展，版本 3</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_lib_extensions_3 skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading">C++ 标准库扩展，版本 3</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p>C++ 库基础扩展 (C++ Extensions for Library Fundamentals) 的版本 3 在<a href="cpp-experimental-lib_extensions.html">版本 1</a> 与<a href="cpp-experimental-lib_extensions_2.html">版本 2</a> 之外为 C++ 标准库定义下列新组件。</p>
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<p><span class="t-lc"><a href="cpp-experimental-make_array.html">std::experimental::make_array</a></span> 及并入 C++17/20 的组件被排除出库基础 TS v3 。</p>
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<h3><span class="mw-headline" id=".E4.BD.9C.E7.94.A8.E5.9F.9F.E9.98.B2.E6.8A.A4">作用域防护</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于头文件 <code><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/header/experimental/scope&action=edit&redlink=1" class="new" title="cpp/header/experimental/scope（页面不存在）"><experimental/scope></a></code></div>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-experimental-scope_exit.html"><span class="t-lines"><span>scope_exit</span></span></a></div>
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</div>
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</td>
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<td>包装函数对象并在退出作用域时调用<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-experimental-scope_fail.html"><span class="t-lines"><span>scope_fail</span></span></a></div>
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</div>
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</td>
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<td>包装函数对象并在通过异常退出作用域时调用<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-experimental-scope_success.html"><span class="t-lines"><span>scope_success</span></span></a></div>
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</div>
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</td>
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<td>包装函数对象并在正常退出作用域时调用<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-experimental-unique_resource.html"><span class="t-lines"><span>unique_resource</span></span></a></div>
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</div>
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</td>
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<td>通用 RAII 资源柄包装<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E7.89.B9.E6.80.A7.E6.B5.8B.E8.AF.95.E5.AE.8F">特性测试宏</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于头文件 <code><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/header/experimental/scope&action=edit&redlink=1" class="new" title="cpp/header/experimental/scope（页面不存在）"><experimental/scope></a></code></div>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><span class="t-lines"><span>__cpp_lib_experimental_scope</span></span></div>
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</div>
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</td>
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<td>至少为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201902</span></span></span> 的值，指示支持作用域防护<br />
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<span class="t-mark">(宏常量)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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