462 lines
36 KiB
HTML
462 lines
36 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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<title>标准库头文件 <system_error></title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_header_system_error skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <system_error></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-header.html">header</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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<p>此头文件是<a href="cpp-error.html">错误处理</a>库的一部分。</p>
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<table class="t-dsc-begin">
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E5.8C.85.E5.90.AB">包含</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-header-compare.html"><span class="t-lines"><span><compare></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td><a href="cpp-language-operator_comparison.html#.E4.B8.89.E8.B7.AF.E6.AF.94.E8.BE.83">三路比较运算符</a>支持</td>
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</tr>
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_category.html"><span class="t-lines"><span>error_category</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>错误类别的基类<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_condition.html"><span class="t-lines"><span>error_condition</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>保有可移植的错误码<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-errc.html"><span class="t-lines"><span>errc</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>列出所有标准 <a href="cpp-header-cerrno.html"><tt><cerrno></tt></a> 宏常量的 <span class="t-lc"><a href="cpp-error-error_condition.html">std::error_condition</a></span> 枚举<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_code.html"><span class="t-lines"><span>error_code</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>保有依赖于平台的错误码<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-system_error.html"><span class="t-lines"><span>system_error</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>用于报告拥有 error_code 的错误条件的异常类<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_code-is_error_code_enum.html"><span class="t-lines"><span>is_error_code_enum</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>鉴别类是否可作为 error_code 枚举<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_condition-is_error_condition_enum.html"><span class="t-lines"><span>is_error_condition_enum</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>鉴别枚举是否可作为 <span class="t-lc"><a href="cpp-error-error_condition.html">std::error_condition</a></span><br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_code-hash.html"><span class="t-lines"><span>std::hash<span class="t-dsc-small"><std::error_code></span></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td><span class="t-lc"><a href="cpp-error-error_code.html">std::error_code</a></span> 的散列支持<br />
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<span class="t-mark">(类模板特化)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E5.89.8D.E7.BD.AE.E5.A3.B0.E6.98.8E">前置声明</span></h5>
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</td>
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</tr>
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于头文件 <code><a href="cpp-header-functional.html"><functional></a></code></div>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-utility-hash.html"><span class="t-lines"><span>hash</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>散列函数对象<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-generic_category.html"><span class="t-lines"><span>generic_category</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>鉴别通用错误类别<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-system_category.html"><span class="t-lines"><span>system_category</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>鉴别操作系统错误类别<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_code-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=></span></span></a></div>
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<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>比较两个 <code>error_code</code><br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_code-operator_ltlt.html"><span class="t-lines"><span>operator<<</span></span></a></div>
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</div>
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</td>
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<td>输出值和类别名到输出流<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-errc-make_error_code.html"><span class="t-lines"><span>make_error_code<span class="t-dsc-small">(std::errc)</span></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>构造 <span class="t-lc"><a href="cpp-error-errc.html">std::errc</a></span> 错误码<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-error_condition-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span><span>operator<=></span></span></a></div>
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<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>比较 <code>error_condition</code> 和 <code>error_code</code><br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-error-errc-make_error_condition.html"><span class="t-lines"><span>make_error_condition<span class="t-dsc-small">(std::errc)</span></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>构造 <span class="t-lc"><a href="cpp-error-errc.html">std::errc</a></span> 错误条件<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <compare></span>
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<span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> error_category<span class="sy4">;</span>
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<span class="kw4">const</span> error_category<span class="sy3">&</span> generic_category<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">const</span> error_category<span class="sy3">&</span> system_category<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw1">class</span> error_code<span class="sy4">;</span>
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<span class="kw1">class</span> error_condition<span class="sy4">;</span>
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<span class="kw1">class</span> system_error<span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span>
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<span class="kw1">struct</span> is_error_code_enum <span class="sy4">:</span> <span class="kw1">public</span> false_type <span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span>
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<span class="kw1">struct</span> is_error_condition_enum <span class="sy4">:</span> <span class="kw1">public</span> false_type <span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span>
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<span class="kw2">enum</span> <span class="kw1">class</span> errc <span class="br0">{</span>
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address_family_not_supported, <span class="co1">// EAFNOSUPPORT</span>
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address_in_use, <span class="co1">// EADDRINUSE</span>
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address_not_available, <span class="co1">// EADDRNOTAVAIL</span>
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already_connected, <span class="co1">// EISCONN</span>
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argument_list_too_long, <span class="co1">// E2BIG</span>
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argument_out_of_domain, <span class="co1">// EDOM</span>
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bad_address, <span class="co1">// EFAULT</span>
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bad_file_descriptor, <span class="co1">// EBADF</span>
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bad_message, <span class="co1">// EBADMSG</span>
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broken_pipe, <span class="co1">// EPIPE</span>
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connection_aborted, <span class="co1">// ECONNABORTED</span>
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connection_already_in_progress, <span class="co1">// EALREADY</span>
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connection_refused, <span class="co1">// ECONNREFUSED</span>
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connection_reset, <span class="co1">// ECONNRESET</span>
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cross_device_link, <span class="co1">// EXDEV</span>
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destination_address_required, <span class="co1">// EDESTADDRREQ</span>
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device_or_resource_busy, <span class="co1">// EBUSY</span>
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directory_not_empty, <span class="co1">// ENOTEMPTY</span>
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executable_format_error, <span class="co1">// ENOEXEC</span>
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file_exists, <span class="co1">// EEXIST</span>
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file_too_large, <span class="co1">// EFBIG</span>
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filename_too_long, <span class="co1">// ENAMETOOLONG</span>
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function_not_supported, <span class="co1">// ENOSYS</span>
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host_unreachable, <span class="co1">// EHOSTUNREACH</span>
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identifier_removed, <span class="co1">// EIDRM</span>
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illegal_byte_sequence, <span class="co1">// EILSEQ</span>
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inappropriate_io_control_operation, <span class="co1">// ENOTTY</span>
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interrupted, <span class="co1">// EINTR</span>
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invalid_argument, <span class="co1">// EINVAL</span>
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invalid_seek, <span class="co1">// ESPIPE</span>
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io_error, <span class="co1">// EIO</span>
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is_a_directory, <span class="co1">// EISDIR</span>
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message_size, <span class="co1">// EMSGSIZE</span>
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network_down, <span class="co1">// ENETDOWN</span>
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network_reset, <span class="co1">// ENETRESET</span>
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network_unreachable, <span class="co1">// ENETUNREACH</span>
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no_buffer_space, <span class="co1">// ENOBUFS</span>
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no_child_process, <span class="co1">// ECHILD</span>
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no_link, <span class="co1">// ENOLINK</span>
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no_lock_available, <span class="co1">// ENOLCK</span>
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no_message_available, <span class="co1">// ENODATA</span>
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no_message, <span class="co1">// ENOMSG</span>
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no_protocol_option, <span class="co1">// ENOPROTOOPT</span>
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no_space_on_device, <span class="co1">// ENOSPC</span>
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no_stream_resources, <span class="co1">// ENOSR</span>
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no_such_device_or_address, <span class="co1">// ENXIO</span>
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no_such_device, <span class="co1">// ENODEV</span>
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no_such_file_or_directory, <span class="co1">// ENOENT</span>
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no_such_process, <span class="co1">// ESRCH</span>
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not_a_directory, <span class="co1">// ENOTDIR</span>
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not_a_socket, <span class="co1">// ENOTSOCK</span>
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not_a_stream, <span class="co1">// ENOSTR</span>
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not_connected, <span class="co1">// ENOTCONN</span>
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not_enough_memory, <span class="co1">// ENOMEM</span>
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not_supported, <span class="co1">// ENOTSUP</span>
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operation_canceled, <span class="co1">// ECANCELED</span>
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operation_in_progress, <span class="co1">// EINPROGRESS</span>
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operation_not_permitted, <span class="co1">// EPERM</span>
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operation_not_supported, <span class="co1">// EOPNOTSUPP</span>
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operation_would_block, <span class="co1">// EWOULDBLOCK</span>
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owner_dead, <span class="co1">// EOWNERDEAD</span>
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permission_denied, <span class="co1">// EACCES</span>
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protocol_error, <span class="co1">// EPROTO</span>
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protocol_not_supported, <span class="co1">// EPROTONOSUPPORT</span>
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read_only_file_system, <span class="co1">// EROFS</span>
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resource_deadlock_would_occur, <span class="co1">// EDEADLK</span>
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resource_unavailable_try_again, <span class="co1">// EAGAIN</span>
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result_out_of_range, <span class="co1">// ERANGE</span>
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state_not_recoverable, <span class="co1">// ENOTRECOVERABLE</span>
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stream_timeout, <span class="co1">// ETIME</span>
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text_file_busy, <span class="co1">// ETXTBSY</span>
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timed_out, <span class="co1">// ETIMEDOUT</span>
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too_many_files_open_in_system, <span class="co1">// ENFILE</span>
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|
too_many_files_open, <span class="co1">// EMFILE</span>
|
|
too_many_links, <span class="co1">// EMLINK</span>
|
|
too_many_symbolic_link_levels, <span class="co1">// ELOOP</span>
|
|
value_too_large, <span class="co1">// EOVERFLOW</span>
|
|
wrong_protocol_type, <span class="co1">// EPROTOTYPE</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><></span> <span class="kw1">struct</span> is_error_condition_enum<span class="sy1"><</span>errc<span class="sy1">></span> <span class="sy4">:</span> true_type <span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 非成员函数</span>
|
|
error_code make_error_code<span class="br0">(</span>errc e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">></span>
|
|
basic_ostream<span class="sy1"><</span>charT, traits<span class="sy1">></span><span class="sy3">&</span>
|
|
operator<span class="sy1"><<</span><span class="br0">(</span>basic_ostream<span class="sy1"><</span>charT, traits<span class="sy1">></span><span class="sy3">&</span> os, <span class="kw4">const</span> error_code<span class="sy3">&</span> ec<span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 非成员函数</span>
|
|
error_condition make_error_condition<span class="br0">(</span>errc e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 比较函数</span>
|
|
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> error_code<span class="sy3">&</span> lhs, <span class="kw4">const</span> error_code<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> error_code<span class="sy3">&</span> lhs, <span class="kw4">const</span> error_condition<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> error_condition<span class="sy3">&</span> lhs, <span class="kw4">const</span> error_condition<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
strong_ordering operator<span class="sy1"><=></span><span class="br0">(</span><span class="kw4">const</span> error_code<span class="sy3">&</span> lhs,
|
|
<span class="kw4">const</span> error_code<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
strong_ordering operator<span class="sy1"><=></span><span class="br0">(</span><span class="kw4">const</span> error_condition<span class="sy3">&</span> lhs,
|
|
<span class="kw4">const</span> error_condition<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 散列支持</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span> <span class="kw1">struct</span> hash<span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><></span> <span class="kw1">struct</span> hash<span class="sy1"><</span>error_code<span class="sy1">></span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><></span> <span class="kw1">struct</span> hash<span class="sy1"><</span>error_condition<span class="sy1">></span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 系统错误支持</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> is_error_code_enum_v <span class="sy1">=</span> is_error_code_enum<span class="sy1"><</span>T<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> T<span class="sy1">></span>
|
|
<span class="kw1">inline</span> <span class="kw4">constexpr</span> <span class="kw4">bool</span> is_error_condition_enum_v <span class="sy1">=</span> is_error_condition_enum<span class="sy1"><</span>T<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB_std::error_category">类 <span class="t-lc"><a href="cpp-error-error_category.html">std::error_category</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">class</span> error_category <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="kw4">constexpr</span> error_category<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> ~error_category<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
error_category<span class="br0">(</span><span class="kw4">const</span> error_category<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
error_category<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> error_category<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> name<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> error_condition default_error_condition<span class="br0">(</span><span class="kw4">int</span> ev<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> <span class="kw4">bool</span> equivalent<span class="br0">(</span><span class="kw4">int</span> code, <span class="kw4">const</span> error_condition<span class="sy3">&</span> condition<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> <span class="kw4">bool</span> equivalent<span class="br0">(</span><span class="kw4">const</span> error_code<span class="sy3">&</span> code, <span class="kw4">int</span> condition<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">virtual</span> string message<span class="br0">(</span><span class="kw4">int</span> ev<span class="br0">)</span> <span class="kw4">const</span> <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
|
|
|
|
<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> error_category<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
strong_ordering operator<span class="sy1"><=></span><span class="br0">(</span><span class="kw4">const</span> error_category<span class="sy3">&</span> rhs<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
|
|
<span class="kw4">const</span> error_category<span class="sy3">&</span> generic_category<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">const</span> error_category<span class="sy3">&</span> system_category<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB_std::error_code">类 <span class="t-lc"><a href="cpp-error-error_code.html">std::error_code</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">class</span> error_code <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="co1">// 构造函数</span>
|
|
error_code<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
error_code<span class="br0">(</span><span class="kw4">int</span> val, <span class="kw4">const</span> error_category<span class="sy3">&</span> cat<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> ErrorCodeEnum<span class="sy1">></span>
|
|
error_code<span class="br0">(</span>ErrorCodeEnum e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 修改器</span>
|
|
<span class="kw4">void</span> assign<span class="br0">(</span><span class="kw4">int</span> val, <span class="kw4">const</span> error_category<span class="sy3">&</span> cat<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> ErrorCodeEnum<span class="sy1">></span>
|
|
error_code<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span>ErrorCodeEnum e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">void</span> clear<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 观察器</span>
|
|
<span class="kw4">int</span> value<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">const</span> error_category<span class="sy3">&</span> category<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
error_condition default_error_condition<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
string message<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
|
|
<span class="kw1">explicit</span> operator <span class="kw4">bool</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">private</span><span class="sy4">:</span>
|
|
<span class="kw4">int</span> val_<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="kw4">const</span> error_category<span class="sy2">*</span> cat_<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 非成员函数</span>
|
|
error_code make_error_code<span class="br0">(</span>errc e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits<span class="sy1">></span>
|
|
basic_ostream<span class="sy1"><</span>charT, traits<span class="sy1">></span><span class="sy3">&</span>
|
|
operator<span class="sy1"><<</span><span class="br0">(</span>basic_ostream<span class="sy1"><</span>charT, traits<span class="sy1">></span><span class="sy3">&</span> os, <span class="kw4">const</span> error_code<span class="sy3">&</span> ec<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB_std::error_condition">类 <span class="t-lc"><a href="cpp-error-error_condition.html">std::error_condition</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">class</span> error_condition <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="co1">// 构造函数</span>
|
|
error_condition<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
error_condition<span class="br0">(</span><span class="kw4">int</span> val, <span class="kw4">const</span> error_category<span class="sy3">&</span> cat<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> ErrorConditionEnum<span class="sy1">></span>
|
|
error_condition<span class="br0">(</span>ErrorConditionEnum e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 修改器</span>
|
|
<span class="kw4">void</span> assign<span class="br0">(</span><span class="kw4">int</span> val, <span class="kw4">const</span> error_category<span class="sy3">&</span> cat<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> ErrorConditionEnum<span class="sy1">></span>
|
|
error_condition<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span>ErrorConditionEnum e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">void</span> clear<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 观察器</span>
|
|
<span class="kw4">int</span> value<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">const</span> error_category<span class="sy3">&</span> category<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
string message<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
|
|
<span class="kw1">explicit</span> operator <span class="kw4">bool</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">private</span><span class="sy4">:</span>
|
|
<span class="kw4">int</span> val_<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="kw4">const</span> error_category<span class="sy2">*</span> cat_<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB_std::system_error">类 <span class="t-lc"><a href="cpp-error-system_error.html">std::system_error</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">class</span> system_error <span class="sy4">:</span> <span class="kw1">public</span> runtime_error <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
system_error<span class="br0">(</span>error_code ec, <span class="kw4">const</span> string<span class="sy3">&</span> what_arg<span class="br0">)</span><span class="sy4">;</span>
|
|
system_error<span class="br0">(</span>error_code ec, <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> what_arg<span class="br0">)</span><span class="sy4">;</span>
|
|
system_error<span class="br0">(</span>error_code ec<span class="br0">)</span><span class="sy4">;</span>
|
|
system_error<span class="br0">(</span><span class="kw4">int</span> ev, <span class="kw4">const</span> error_category<span class="sy3">&</span> ecat, <span class="kw4">const</span> string<span class="sy3">&</span> what_arg<span class="br0">)</span><span class="sy4">;</span>
|
|
system_error<span class="br0">(</span><span class="kw4">int</span> ev, <span class="kw4">const</span> error_category<span class="sy3">&</span> ecat, <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> what_arg<span class="br0">)</span><span class="sy4">;</span>
|
|
system_error<span class="br0">(</span><span class="kw4">int</span> ev, <span class="kw4">const</span> error_category<span class="sy3">&</span> ecat<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw4">const</span> error_code<span class="sy3">&</span> code<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> what<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> override<span class="sy4">;</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="visualClear"></div>
|
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</div>
|
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</div>
|
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</div>
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</body>
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</html>
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