142 lines
11 KiB
HTML
142 lines
11 KiB
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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<title>std::basic_stacktrace<Allocator>::basic_stacktrace</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_basic_stacktrace_basic_stacktrace skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_stacktrace<Allocator>::</span>basic_stacktrace</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-utility.html">utility</a>‎ | <a href="cpp-utility-basic_stacktrace.html">basic stacktrace</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">basic_stacktrace<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="br0">(</span><span class="coMULTI">/* see below */</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> basic_stacktrace<span class="br0">(</span> <span class="kw4">const</span> allocator_type<span class="sy3">&</span> alloc <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_stacktrace<span class="br0">(</span> <span class="kw4">const</span> basic_stacktrace<span class="sy3">&</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_stacktrace<span class="br0">(</span> basic_stacktrace<span class="sy3">&&</span> other <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td>(4)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_stacktrace<span class="br0">(</span> <span class="kw4">const</span> basic_stacktrace<span class="sy3">&</span> other,<br />
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<span class="kw4">const</span> allocator_type<span class="sy3">&</span> alloc <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(5)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_stacktrace<span class="br0">(</span> basic_stacktrace<span class="sy3">&&</span> other, <span class="kw4">const</span> allocator_type<span class="sy3">&</span> alloc <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(6)</td>
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<td><span class="t-mark-rev t-since-cxx23">(C++23 起)</span></td>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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<p>构造空的 <code>basic_stacktrace</code> ，或从 <code>other</code> 复制/移动。</p>
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<div class="t-li1"><span class="t-li">1)</span> 默认构造函数。构造带默认构造的分配器的空 <code>basic_stacktrace</code> 。</div>
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<div class="t-li1"><span class="t-li">2)</span> 以 <code>alloc</code> 为分配器构造空 <code>basic_stacktrace</code> 。</div>
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<div class="t-li1"><span class="t-li">3)</span> 复制构造函数。以 <code>other</code> 的内容副本构造 <code>basic_stacktrace</code> ，如同通过调用 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-allocator_traits.html"><span class="kw701">std::<span class="me2">allocator_traits</span></span></a><span class="sy1"><</span>allocator_type<span class="sy1">></span><span class="sy4">::</span><span class="me2">select_on_container_copy_construction</span><span class="br0">(</span>other.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> 获得分配器。</div>
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<div class="t-li1"><span class="t-li">4)</span> 移动构造函数。用移动语义以 <code>other</code> 的内容构造 <code>basic_stacktrace</code> 。从 <code>other</code> 的分配器移动构造分配器。构造后， <code>other</code> 被置于合法但未指定的状态。</div>
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<div class="t-li1"><span class="t-li">5)</span> 同复制构造函数，除了以 <code>alloc</code> 为分配器。</div>
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<div class="t-li1"><span class="t-li">6)</span> 若 <span class="t-c"><span class="mw-geshi cpp source-cpp">alloc <span class="sy1">==</span> other.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> 则表现同移动构造函数。否则，用 <code>alloc</code> 分配内存并进行逐元素移动。以 <code>alloc</code> 为分配器。</div>
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<p><span class="t-v">(3,5,6)</span> 在分配失败时可能抛出异常或构造空的 <code>basic_stacktrace</code> 。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<td>alloc</td>
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<td>-</td>
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<td>用于构造的 <code>basic_stacktrace</code> 的所有内存分配的分配器</td>
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</tr>
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<tr class="t-par">
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<td>other</td>
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<td>-</td>
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<td>要复制/移动的另一 <code>basic_stacktrace</code></td>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-li1"><span class="t-li">1)</span>
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<div class="t-noexcept-full"><a href="cpp-language-noexcept_spec.html"><tt>noexcept</tt></a> 说明：
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<div class="t-noexcept-box"><span class="t-cc"><span class="mw-geshi cpp source-cpp"><span class="kw1">noexcept</span><span class="br0">(</span><a href="cpp-types-is_default_constructible.html"><span class="kw531">std::<span class="me2">is_nothrow_default_constructible_v</span></span></a><span class="sy1"><</span>allocator_type<span class="sy1">></span><span class="br0">)</span></span></span></div>
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<div class="t-li1"><span class="t-li">3,5,6)</span> 可能传播分配失败时抛出的异常。</div>
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<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">复杂度</span></h3>
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<div class="t-li1"><span class="t-li">1-2)</span> 常数。</div>
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<div class="t-li1"><span class="t-li">3)</span> 与 <code>other</code> 的大小成线性。</div>
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<div class="t-li1"><span class="t-li">4)</span> 常数。</div>
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<div class="t-li1"><span class="t-li">5)</span> 与 <code>other</code> 的大小成线性。</div>
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<div class="t-li1"><span class="t-li">6)</span> 若 <span class="t-c"><span class="mw-geshi cpp source-cpp">alloc <span class="sy3">!</span><span class="sy1">=</span> other.<span class="me1">get_allocator</span><span class="br0">(</span><span class="br0">)</span></span></span> 则与 <code>other</code> 的大小成线性，否则为常数。</div>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p>在容器移动构造（重载 <span class="t-v">(4)</span> ）后，指向 <code>other</code> 的引用及迭代器（除了尾迭代器）保持合法，但指代现于 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 中的元素。当前标准由 <a rel="nofollow" class="external text" href="https://eel.is/c++draft/container.requirements.general#12">[container.requirements.general]/12</a> 中的总括陈述作出此保证，而 <a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue2321">LWG 2321</a> 正在考虑更严格的保证。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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<div class="t-dsc-member-div">
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<div><a href="cpp-utility-basic_stacktrace-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
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</div>
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</td>
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<td>赋值给 <code>basic_stacktrace</code><br />
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<span class="t-mark">(公开成员函数)</span></td>
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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-utility-basic_stacktrace-current.html"><span class="t-lines"><span>current</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[静态]</span> <span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
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</div>
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</td>
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<td>获得当前栈踪或其给定部分<br />
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<span class="t-mark">(公开静态成员函数)</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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</body>
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