100 lines
6.8 KiB
HTML
100 lines
6.8 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::basic_osyncstream<CharT,Traits,Allocator>::emit</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_io_basic_osyncstream_emit 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::basic_osyncstream<CharT,Traits,Allocator>::</span>emit</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-io.html">io</a>‎ | <a href="cpp-io-basic_osyncstream.html">basic osyncstream</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">
|
|
<td class="t-dcl-nopad">
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> emit<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td class="t-dcl-nopad"></td>
|
|
<td class="t-dcl-nopad"></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>通过在底层 <a href="cpp-io-basic_syncbuf.html"><tt>std::basic_syncbuf</tt></a> 上调用 <a href="cpp-io-basic_syncbuf-emit.html"><tt>emit()</tt></a> ，发射所有缓冲的输出并执行任何未决的冲入。</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=".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 <syncstream></span>
|
|
<span class="co2">#include <iostream></span>
|
|
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
|
|
<span class="br0">{</span>
|
|
<span class="br0">{</span>
|
|
std<span class="sy4">::</span><span class="me2">osyncstream</span> bout<span class="br0">(</span><a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a><span class="br0">)</span><span class="sy4">;</span>
|
|
std<span class="sy4">::</span><span class="me2">bout</span> <span class="sy1"><<</span> <span class="st0">"Hello,"</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span> <span class="co1">// 不冲入</span>
|
|
std<span class="sy4">::</span><span class="me2">bout</span>.<span class="me1">emit</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 传输字符； cout 不冲入</span>
|
|
std<span class="sy4">::</span><span class="me2">bout</span> <span class="sy1"><<</span> <span class="st0">"World!"</span> <span class="sy1"><<</span> <a href="cpp-io-manip-endl.html"><span class="kw1791">std::<span class="me2">endl</span></span></a><span class="sy4">;</span> <span class="co1">// 提醒冲入； cout 不冲入</span>
|
|
std<span class="sy4">::</span><span class="me2">bout</span>.<span class="me1">emit</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 传输字符； cout 冲入</span>
|
|
std<span class="sy4">::</span><span class="me2">bout</span> <span class="sy1"><<</span> <span class="st0">"Greetings."</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span> <span class="co1">// 不冲入</span>
|
|
<span class="br0">}</span> <span class="co1">// 析构函数调用 emit() ：传输字符； cout 不冲入</span>
|
|
|
|
<span class="co1">// emit 能用于被包装流上的局部异常处理</span>
|
|
std<span class="sy4">::</span><span class="me2">osyncstream</span> bout<span class="br0">(</span><a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a><span class="br0">)</span><span class="sy4">;</span>
|
|
bout <span class="sy1"><<</span> <span class="st0">"Hello, "</span> <span class="sy1"><<</span> <span class="st0">"World!"</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
|
|
<span class="kw1">try</span> <span class="br0">{</span>
|
|
bout.<span class="me1">emit</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="br0">}</span> <span class="kw1">catch</span> <span class="br0">(</span>...<span class="br0">)</span> <span class="br0">{</span>
|
|
<span class="co1">// 处理异常</span>
|
|
<span class="br0">}</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<p>输出：</p>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="text source-text">
|
|
<pre class="de1">Hello,
|
|
World!
|
|
Greetings.
|
|
Hello, World!</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 t-dsc-member-nobold-div">
|
|
<div><a href="cpp-io-basic_osyncstream-~basic_osyncstream.html"><span class="t-lines"><span>(析构函数)</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>销毁 basic_osyncstream 并发射其内部缓冲区<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-io-basic_syncbuf-emit.html"><span class="t-lines"><span>emit</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>原子地传输整个内部缓冲区给被包装 streambuf<br />
|
|
<span class="t-mark">(<code>std::basic_syncbuf<CharT,Traits,Allocator></code> 的公开成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|