71 lines
4.9 KiB
HTML
71 lines
4.9 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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<title>标准库头文件 <source_location></title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <source_location></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-header.html">header</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>此头文件是<a href="cpp-utility.html">工具</a>库的一部分。</p>
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<table class="t-dsc-begin">
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
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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-utility-source_location.html"><span class="t-lines"><span>source_location</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>表示关于源码的信息，例如文件名、行号以及函数名的类<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">struct</span> source_location<span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB_std::source_location">类 <span class="t-lc">std::source_location</span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">struct</span> source_location <span class="br0">{</span>
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<span class="co1">// 源位置构造</span>
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<span class="kw4">static</span> consteval source_location current<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">constexpr</span> source_location<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="co1">// 源位置域访问</span>
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<span class="kw4">constexpr</span> uint_least32_t line<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">constexpr</span> uint_least32_t column<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">constexpr</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> file_name<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">constexpr</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> function_name<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw1">private</span><span class="sy4">:</span>
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uint_least32_t line_<span class="sy4">;</span> <span class="co1">// 仅为阐释</span>
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uint_least32_t column_<span class="sy4">;</span> <span class="co1">// 仅为阐释</span>
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<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> file_name_<span class="sy4">;</span> <span class="co1">// 仅为阐释</span>
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<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> function_name_<span class="sy4">;</span> <span class="co1">// 仅为阐释</span>
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<span class="br0">}</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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