61 lines
4.5 KiB
HTML
61 lines
4.5 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>std::experimental::source_location::current</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_source_location_current 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"><span style="font-size:0.7em; line-height:130%">std::experimental::source_location::</span>current</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>‎ | <a href="cpp-experimental-source_location.html">source location</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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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">static</span> <span class="kw4">constexpr</span> source_location current<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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</td>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(库基础 TS v2)</span></td>
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<td></td>
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<td></td>
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<td></td>
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</tbody>
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</table>
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<p>构造新的 <code>source_location</code> 对象。</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>若直接调用 <code>current()</code> （通过指名 <code>current()</code> 的函数调用），则返回拥有表示调用位置的实现定义值的 <code>source_location</code> 对象。该值应该以和预定义宏 <span class="t-c"><span class="mw-geshi cpp source-cpp">__LINE__</span></span> 及 <span class="t-c"><span class="mw-geshi cpp source-cpp">__FILE__</span></span> 相同的方式受 <a href="cpp-preprocessor-line.html"><code>#line</code> 预处理器指令</a>影响。</p>
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<p>若以任何其他方式调用 <code>current()</code> ，则返回值未指定。</p>
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<h3><span class="mw-headline" id=".E6.8F.90.E9.86.92">提醒</span></h3>
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<p>若将 <code>current()</code> 用于<a href="cpp-language-data_members.html#.E6.88.90.E5.91.98.E5.88.9D.E5.A7.8B.E5.8C.96">非静态数据成员的初始化器</a>，则返回值对应初始化该数据成员的构造函数或<a href="cpp-language-aggregate_initialization.html">聚合初始化</a>的位置。</p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p><code>current()</code> 被用于默认参数时，返回值将对应在调用点对 <code>current()</code> 调用的位置。</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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<p>（无）</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><a href="cpp-experimental-source_location-source_location.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</div>
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</td>
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<td>创建拥有实现定义值的新 <code>source_location</code><br />
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<span class="t-mark">(公开成员函数)</span></td>
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