108 lines
6.5 KiB
HTML
108 lines
6.5 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>std::source_location::column</title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_source_location_column skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::source_location::</span>column</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-utility.html">utility</a>‎ | <a href="cpp-utility-source_location.html">source location</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<table class="t-dcl-begin">
|
|
<tbody>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <a href="cpp-types-integer.html"><span class="kw130">std::<span class="me2">uint_least32_t</span></span></a> column<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td class="t-dcl-nopad"></td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>返回表示从此对象所表示的行起始的偏移的实现定义值（即列号）。列号预设为从 1 开始。</p>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
|
|
<p>（无）</p>
|
|
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
|
|
<p>表示从此对象所表示的行起始的偏移的实现定义值（即列号）。</p>
|
|
<p>鼓励实现在列号未知时使用 <code>0</code> 。</p>
|
|
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
|
|
<div class="t-example">
|
|
<div class="t-example-live-link"></div>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="co2">#include <iostream></span>
|
|
<span class="co2">#include <string_view></span>
|
|
<span class="co2">#include <source_location></span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">typename</span> T <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">source_location</span><span class="sy1">></span>
|
|
<span class="kw1">inline</span> <span class="kw4">void</span> pos<span class="br0">(</span><span class="kw4">const</span> T<span class="sy3">&</span> location <span class="sy1">=</span> T<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"><<</span> <span class="st0">"("</span>
|
|
<span class="sy1"><<</span> location.<span class="me1">line</span><span class="br0">(</span><span class="br0">)</span>
|
|
<span class="sy1"><<</span> <span class="st0">':'</span>
|
|
<span class="sy1"><<</span> location.<span class="me1">column</span><span class="br0">(</span><span class="br0">)</span>
|
|
<span class="sy1"><<</span> <span class="st0">") "</span><span class="sy4">;</span>
|
|
<span class="br0">}</span>
|
|
|
|
<span class="kw4">auto</span> main<span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span><span class="sy1">></span> <span class="kw4">int</span>
|
|
<span class="br0">{</span>
|
|
pos<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Proxima<span class="es1">\n</span>"</span><span class="sy4">;</span>
|
|
pos<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Centauri<span class="es1">\n</span>"</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<p>可能的输出：</p>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="text source-text">
|
|
<pre class="de1">(18:5) Proxima
|
|
(19:5) Centauri</pre></div>
|
|
</div>
|
|
</div>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-utility-source_location-line.html"><span class="t-lines"><span>line</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>返回此对象所表示的行号<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-utility-source_location-file_name.html"><span class="t-lines"><span>file_name</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>返回此对象所表示的文件名<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-utility-source_location-function_name.html"><span class="t-lines"><span>function_name</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>返回此对象表示的函数名，若它存在<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|