164 lines
8.9 KiB
HTML
164 lines
8.9 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::bad_exception</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_error_bad_exception 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::</span>bad_exception</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-error.html">error</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-dsc-header">
|
|
<td>
|
|
<div>定义于头文件 <code><a href="cpp-header-exception.html"><exception></a></code></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl">
|
|
<td class="t-dcl-nopad">
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> bad_exception<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><code>std::bad_exception</code> 是 C++ 运行时在下列情况抛出的异常类型：</p>
|
|
<table class="t-rev-begin">
|
|
<tr class="t-rev t-since-cxx11">
|
|
<td>
|
|
<ul>
|
|
<li>若 <span class="t-lc"><a href="cpp-error-exception_ptr.html">std::exception_ptr</a></span> 存储被捕捉异常的副本，且被 <span class="t-lc"><a href="cpp-error-current_exception.html">std::current_exception</a></span> 捕捉的异常对象的复制构造函数抛出异常，则被捕捉的异常是 <code>std::bad_exception</code> 的一个实例。</li>
|
|
</ul>
|
|
</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
<tr class="t-rev t-until-cxx17">
|
|
<td>
|
|
<ul>
|
|
<li>若<a href="cpp-language-except_spec.html">动态异常规定</a>被违背且 <span class="t-lc"><a href="cpp-error-unexpected.html">std::unexpected</a></span> 抛出或重抛仍然违背异常规定的异常，但异常规定允许 <code>std::bad_exception</code> ，则抛出 <code>std::bad_exception</code> 。</li>
|
|
</ul>
|
|
</td>
|
|
<td><span class="t-mark-rev t-until-cxx17">(C++17 前)</span></td>
|
|
</tr>
|
|
</table>
|
|
<div class="t-inheritance-diagram">
|
|
<div class="center">
|
|
<div class="noresize" style="height: 40px; width: 243px;"><map name="ImageMap_1_1517982771" id="ImageMap_1_1517982771">
|
|
<area href="cpp-error-exception.html" shape="rect" coords="5,4,107,36" alt="cpp/error/exception" /></map><img alt="std-bad exception-inheritance.svg" src="std-bad_exception-inheritance.svg" width="243" height="40" usemap="#ImageMap_1_1517982771" /></div>
|
|
</div>
|
|
<div style="text-align:center;">
|
|
<p><span style="font-size:0.7em; line-height:130%">继承图</span></p>
|
|
</div>
|
|
</div>
|
|
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</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-error-bad_exception-bad_exception.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>构造 <code>bad_exception</code> 对象<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-error-bad_exception-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>复制该对象<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-error-bad_exception-what.html"><span class="t-lines"><span>what</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>返回解释性字符串<br />
|
|
<span class="t-mark">(虚公开成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
<div class="t-inherited">
|
|
<h2><span class="mw-headline" id=".E7.BB.A7.E6.89.BF.E8.87.AA_std::exception">继承自 <a href="cpp-error-exception.html"><span style="font-size:0.7em; line-height:130%">std::</span>exception</a></span></h2>
|
|
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0_2">成员函数</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-error-exception-~exception.html"><span class="t-lines"><span>(析构函数)</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>析构该异常对象<br />
|
|
<span class="t-mark">(<code>std::exception</code> 的虚公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-error-exception-what.html"><span class="t-lines"><span>what</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>返回解释性字符串<br />
|
|
<span class="t-mark">(<code>std::exception</code> 的虚公开成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<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 <exception></span>
|
|
<span class="co2">#include <stdexcept></span>
|
|
|
|
<span class="kw4">void</span> my_unexp<span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span> <span class="kw1">throw</span><span class="sy4">;</span> <span class="br0">}</span>
|
|
|
|
<span class="kw4">void</span> test<span class="br0">(</span><span class="br0">)</span> <span class="kw1">throw</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">bad_exception</span><span class="br0">)</span>
|
|
<span class="br0">{</span>
|
|
<span class="kw1">throw</span> <a href="cpp-error-runtime_error.html"><span class="kw770">std::<span class="me2">runtime_error</span></span></a><span class="br0">(</span><span class="st0">"test"</span><span class="br0">)</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>
|
|
<a href="cpp-error-set_unexpected.html"><span class="kw790">std::<span class="me2">set_unexpected</span></span></a><span class="br0">(</span>my_unexp<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">try</span> <span class="br0">{</span>
|
|
test<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="kw4">const</span> std<span class="sy4">::</span><span class="me2">bad_exception</span><span class="sy3">&</span> e<span class="br0">)</span>
|
|
<span class="br0">{</span>
|
|
<a href="cpp-io-cerr.html"><span class="kw1759">std::<span class="me2">cerr</span></span></a> <span class="sy1"><<</span> <span class="st0">"Caught "</span> <span class="sy1"><<</span> e.<span class="me1">what</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
|
|
<span class="br0">}</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">Caught std::bad_exception</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|