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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>source_location</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-utility.html">utility</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-source_location.html">&lt;source_location&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">struct</span> source_location<span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p><code>source_location</code> &#31867;&#34920;&#31034;&#20851;&#20110;&#28304;&#30721;&#30340;&#20855;&#20307;&#20449;&#24687;&#65292;&#20363;&#22914;&#25991;&#20214;&#21517;&#12289;&#34892;&#21495;&#20197;&#21450;&#20989;&#25968;&#21517;&#12290;&#20197;&#21069;&#65292;&#24076;&#26395;&#33719;&#24471;&#20851;&#20110;&#35843;&#29992;&#20301;&#32622;&#30340;&#20449;&#24687;&#65288;&#29992;&#20110;&#35760;&#24405;&#12289;&#27979;&#35797;&#25110;&#35843;&#35797;&#30446;&#30340;&#65289;&#30340;&#20989;&#25968;&#24517;&#39035;&#20351;&#29992;&#23439;&#65292;&#20197;&#20196;&#22914; <span class="t-lc">__LINE__</span> &#19982; <span class="t-lc">__FILE__</span> &#30340;&#39044;&#23450;&#20041;&#23439;&#20110;&#35843;&#29992;&#26041;&#30340;&#29615;&#22659;&#23637;&#24320;&#12290; <code>source_location</code> &#31867;&#25552;&#20379;&#26356;&#22909;&#30340;&#26367;&#20195;&#12290;</p>
<p><code>source_location</code> &#31526;&#21512;<a href="cpp-named_req-DefaultConstructible.html"><span style="font-style:italic">&#21487;&#40664;&#35748;&#26500;&#36896;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(DefaultConstructible)</span></a> &#12289;<a href="cpp-named_req-CopyConstructible.html"><span style="font-style:italic">&#21487;&#22797;&#21046;&#26500;&#36896;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(CopyConstructible)</span></a> &#12289;<a href="cpp-named_req-CopyAssignable.html"><span style="font-style:italic">&#21487;&#22797;&#21046;&#36171;&#20540;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(CopyAssignable)</span></a> &#21450;<a href="cpp-named_req-Destructible.html"><span style="font-style:italic">&#21487;&#26512;&#26500;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(Destructible)</span></a> &#35201;&#27714;&#12290; <code>source_location</code> &#30340;&#24038;&#20540;&#31526;&#21512;<a href="cpp-named_req-Swappable.html"><span style="font-style:italic">&#21487;&#20132;&#25442;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(Swappable)</span></a> &#35201;&#27714;&#12290; &#21478;&#22806;&#65292;&#19979;&#21015;&#26465;&#20214;&#20026; <code>true</code> &#65306;</p>
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<li><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_move_constructible.html"><span class="kw543">std::<span class="me2">is_nothrow_move_constructible_v</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy1">&gt;</span></span></span> &#12289;</li>
<li><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_move_assignable.html"><span class="kw561">std::<span class="me2">is_nothrow_move_assignable_v</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy1">&gt;</span></span></span> &#21450;</li>
<li><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_swappable.html"><span class="kw577">std::<span class="me2">is_nothrow_swappable_v</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy1">&gt;</span></span></span> &#12290;</li>
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<p>&#26377;&#24847;&#20196; <code>source_location</code> &#25317;&#26377;&#36739;&#23567;&#30340;&#22823;&#23567;&#24182;&#19988;&#33021;&#39640;&#25928;&#22797;&#21046;&#12290;</p>
<p><code>source_location</code> &#30340;&#22797;&#21046;/&#31227;&#21160;&#26500;&#36896;&#20989;&#25968;&#19982;&#22797;&#21046;/&#31227;&#21160;&#36171;&#20540;&#36816;&#31639;&#31526;&#26159;&#21542;&#20026;&#24179;&#20961;&#21644;/&#25110; constexpr &#26159;&#26410;&#25351;&#26126;&#30340;&#12290;</p>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
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<h5><span class="mw-headline" id=".E5.88.9B.E5.BB.BA">&#21019;&#24314;</span></h5>
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<div><a href="cpp-utility-source_location-source_location.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
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<td>&#26500;&#36896;&#25317;&#26377;&#23454;&#29616;&#23450;&#20041;&#30340;&#20540;&#30340;&#26032; <code>source_location</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-utility-source_location-current.html"><span class="t-lines"><span>current</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#38745;&#24577;]</span></span></span></div>
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<td>&#26500;&#36896;&#23545;&#24212;&#35843;&#29992;&#28857;&#20301;&#32622;&#30340;&#26032; <code>source_location</code><br />
<span class="t-mark">(&#20844;&#24320;&#38745;&#24577;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h5><span class="mw-headline" id=".E5.9F.9F.E8.AE.BF.E9.97.AE">&#22495;&#35775;&#38382;</span></h5>
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<td>&#36820;&#22238;&#27492;&#23545;&#35937;&#25152;&#34920;&#31034;&#30340;&#34892;&#21495;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-utility-source_location-column.html"><span class="t-lines"><span>column</span></span></a></div>
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<td>&#36820;&#22238;&#27492;&#23545;&#35937;&#25152;&#34920;&#31034;&#30340;&#21015;&#21495;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-utility-source_location-file_name.html"><span class="t-lines"><span>file_name</span></span></a></div>
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<td>&#36820;&#22238;&#27492;&#23545;&#35937;&#25152;&#34920;&#31034;&#30340;&#25991;&#20214;&#21517;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-utility-source_location-function_name.html"><span class="t-lines"><span>function_name</span></span></a></div>
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<td>&#36820;&#22238;&#27492;&#23545;&#35937;&#34920;&#31034;&#30340;&#20989;&#25968;&#21517;&#65292;&#33509;&#23427;&#23384;&#22312;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;string_view&gt;</span>
<span class="co2">#include &lt;source_location&gt;</span>
<span class="kw4">void</span> log<span class="br0">(</span><a href="cpp-string-basic_string_view.html"><span class="kw1248">std::<span class="me2">string_view</span></span></a> message,
<span class="kw4">const</span> std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy3">&amp;</span> location <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy4">::</span><span class="me2">current</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;info:&quot;</span>
<span class="sy1">&lt;&lt;</span> location.<span class="me1">file_name</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;:&#39;</span>
<span class="sy1">&lt;&lt;</span> location.<span class="me1">line</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39; &#39;</span>
<span class="sy1">&lt;&lt;</span> message <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
log<span class="br0">(</span><span class="st0">&quot;Hello world!&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">info:main.cpp:15 Hello world!</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-utility-stacktrace_entry.html"><span class="t-lines"><span>stacktrace_entry</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
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<td>&#26632;&#36394;&#20013;&#27714;&#20540;&#30340;&#34920;&#31034;<br />
<span class="t-mark">(&#31867;)</span></td>
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