453 lines
14 KiB
HTML
453 lines
14 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>std::errc</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_error_errc 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%">std::</span>errc</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-error.html">error</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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<table class="t-dcl-begin">
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<tbody>
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<tr class="t-dsc-header">
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<td>
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<div>定义于头文件 <code><a href="cpp-header-system_error.html"><system_error></a></code></div>
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</td>
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<td></td>
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<td></td>
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</tr>
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<tr class="t-dcl t-since-cxx11">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw2">enum</span> <span class="kw1">class</span> errc<span class="sy4">;</span></span></div>
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</td>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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</tr>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<p>有作用域枚举 <code>std::errc</code> 定义对应 POSIX 错误码的可移植错误条件。</p>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.B8.B8.E9.87.8F">成员常量</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc-hitem">
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<td>常量</td>
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<td>等价的 POSIX 错误</td>
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</tr>
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<tr class="t-dsc">
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<td><code>address_family_not_supported</code></td>
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<td>EAFNOSUPPORT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>address_in_use</code></td>
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<td>EADDRINUSE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>address_not_available</code></td>
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<td>EADDRNOTAVAIL</td>
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</tr>
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<tr class="t-dsc">
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<td><code>already_connected</code></td>
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<td>EISCONN</td>
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</tr>
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<tr class="t-dsc">
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<td><code>argument_list_too_long</code></td>
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<td>E2BIG</td>
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</tr>
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<tr class="t-dsc">
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<td><code>argument_out_of_domain</code></td>
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<td>EDOM</td>
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</tr>
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<tr class="t-dsc">
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<td><code>bad_address</code></td>
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<td>EFAULT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>bad_file_descriptor</code></td>
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<td>EBADF</td>
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</tr>
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<tr class="t-dsc">
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<td><code>bad_message</code></td>
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<td>EBADMSG</td>
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</tr>
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<tr class="t-dsc">
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<td><code>broken_pipe</code></td>
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<td>EPIPE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>connection_aborted</code></td>
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<td>ECONNABORTED</td>
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</tr>
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<tr class="t-dsc">
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<td><code>connection_already_in_progress</code></td>
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<td>EALREADY</td>
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</tr>
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<tr class="t-dsc">
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<td><code>connection_refused</code></td>
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<td>ECONNREFUSED</td>
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</tr>
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<tr class="t-dsc">
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<td><code>connection_reset</code></td>
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<td>ECONNRESET</td>
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</tr>
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<tr class="t-dsc">
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<td><code>cross_device_link</code></td>
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<td>EXDEV</td>
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</tr>
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<tr class="t-dsc">
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<td><code>destination_address_required</code></td>
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<td>EDESTADDRREQ</td>
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</tr>
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<tr class="t-dsc">
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<td><code>device_or_resource_busy</code></td>
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<td>EBUSY</td>
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</tr>
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<tr class="t-dsc">
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<td><code>directory_not_empty</code></td>
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<td>ENOTEMPTY</td>
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</tr>
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<tr class="t-dsc">
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<td><code>executable_format_error</code></td>
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<td>ENOEXEC</td>
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</tr>
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<tr class="t-dsc">
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<td><code>file_exists</code></td>
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<td>EEXIST</td>
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</tr>
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<tr class="t-dsc">
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<td><code>file_too_large</code></td>
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<td>EFBIG</td>
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</tr>
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<tr class="t-dsc">
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<td><code>filename_too_long</code></td>
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<td>ENAMETOOLONG</td>
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</tr>
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<tr class="t-dsc">
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<td><code>function_not_supported</code></td>
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<td>ENOSYS</td>
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</tr>
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<tr class="t-dsc">
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<td><code>host_unreachable</code></td>
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<td>EHOSTUNREACH</td>
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</tr>
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<tr class="t-dsc">
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<td><code>identifier_removed</code></td>
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<td>EIDRM</td>
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</tr>
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<tr class="t-dsc">
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<td><code>illegal_byte_sequence</code></td>
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<td>EILSEQ</td>
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</tr>
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<tr class="t-dsc">
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<td><code>inappropriate_io_control_operation</code></td>
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<td>ENOTTY</td>
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</tr>
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<tr class="t-dsc">
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<td><code>interrupted</code></td>
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<td>EINTR</td>
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</tr>
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<tr class="t-dsc">
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<td><code>invalid_argument</code></td>
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<td>EINVAL</td>
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</tr>
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<tr class="t-dsc">
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<td><code>invalid_seek</code></td>
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<td>ESPIPE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>io_error</code></td>
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<td>EIO</td>
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</tr>
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<tr class="t-dsc">
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<td><code>is_a_directory</code></td>
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<td>EISDIR</td>
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</tr>
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<tr class="t-dsc">
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<td><code>message_size</code></td>
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<td>EMSGSIZE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>network_down</code></td>
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<td>ENETDOWN</td>
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</tr>
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<tr class="t-dsc">
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<td><code>network_reset</code></td>
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<td>ENETRESET</td>
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</tr>
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<tr class="t-dsc">
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<td><code>network_unreachable</code></td>
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<td>ENETUNREACH</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_buffer_space</code></td>
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<td>ENOBUFS</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_child_process</code></td>
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<td>ECHILD</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_link</code></td>
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<td>ENOLINK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_lock_available</code></td>
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<td>ENOLCK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_message_available</code></td>
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<td>ENODATA</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_message</code></td>
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<td>ENOMSG</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_protocol_option</code></td>
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<td>ENOPROTOOPT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_space_on_device</code></td>
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<td>ENOSPC</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_stream_resources</code></td>
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<td>ENOSR</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_such_device_or_address</code></td>
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<td>ENXIO</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_such_device</code></td>
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<td>ENODEV</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_such_file_or_directory</code></td>
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<td>ENOENT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>no_such_process</code></td>
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<td>ESRCH</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_a_directory</code></td>
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<td>ENOTDIR</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_a_socket</code></td>
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<td>ENOTSOCK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_a_stream</code></td>
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<td>ENOSTR</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_connected</code></td>
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<td>ENOTCONN</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_enough_memory</code></td>
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<td>ENOMEM</td>
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</tr>
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<tr class="t-dsc">
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<td><code>not_supported</code></td>
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<td>ENOTSUP</td>
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</tr>
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<tr class="t-dsc">
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<td><code>operation_canceled</code></td>
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<td>ECANCELED</td>
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</tr>
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<tr class="t-dsc">
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<td><code>operation_in_progress</code></td>
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<td>EINPROGRESS</td>
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</tr>
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<tr class="t-dsc">
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<td><code>operation_not_permitted</code></td>
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<td>EPERM</td>
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</tr>
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<tr class="t-dsc">
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<td><code>operation_not_supported</code></td>
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<td>EOPNOTSUPP</td>
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</tr>
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<tr class="t-dsc">
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<td><code>operation_would_block</code></td>
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<td>EWOULDBLOCK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>owner_dead</code></td>
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<td>EOWNERDEAD</td>
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</tr>
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<tr class="t-dsc">
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<td><code>permission_denied</code></td>
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<td>EACCES</td>
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</tr>
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<tr class="t-dsc">
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<td><code>protocol_error</code></td>
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<td>EPROTO</td>
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</tr>
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<tr class="t-dsc">
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<td><code>protocol_not_supported</code></td>
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<td>EPROTONOSUPPORT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>read_only_file_system</code></td>
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<td>EROFS</td>
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</tr>
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<tr class="t-dsc">
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<td><code>resource_deadlock_would_occur</code></td>
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<td>EDEADLK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>resource_unavailable_try_again</code></td>
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<td>EAGAIN</td>
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</tr>
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<tr class="t-dsc">
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<td><code>result_out_of_range</code></td>
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<td>ERANGE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>state_not_recoverable</code></td>
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<td>ENOTRECOVERABLE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>stream_timeout</code></td>
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<td>ETIME</td>
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</tr>
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<tr class="t-dsc">
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<td><code>text_file_busy</code></td>
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<td>ETXTBSY</td>
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</tr>
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<tr class="t-dsc">
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<td><code>timed_out</code></td>
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<td>ETIMEDOUT</td>
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</tr>
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<tr class="t-dsc">
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<td><code>too_many_files_open_in_system</code></td>
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<td>ENFILE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>too_many_files_open</code></td>
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<td>EMFILE</td>
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</tr>
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<tr class="t-dsc">
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<td><code>too_many_links</code></td>
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<td>EMLINK</td>
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</tr>
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<tr class="t-dsc">
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<td><code>too_many_symbolic_link_levels</code></td>
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<td>ELOOP</td>
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</tr>
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<tr class="t-dsc">
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<td><code>value_too_large</code></td>
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<td>EOVERFLOW</td>
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</tr>
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<tr class="t-dsc">
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<td><code>wrong_protocol_type</code></td>
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<td>EPROTOTYPE</td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">非成员函数</span></h3>
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<table class="t-dsc-begin">
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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"><strong class="selflink">std::errc</strong></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-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"><strong class="selflink">std::errc</strong></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=".E5.B8.AE.E5.8A.A9.E7.B1.BB">帮助类</span></h3>
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<table class="t-dsc-begin">
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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-is_error_condition_enum.html"><span class="t-lines"><span>is_error_condition_enum<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>扩充 <span class="t-lc"><a href="cpp-error-error_condition-is_error_condition_enum.html">std::is_error_condition_enum</a></span> 类型特性以鉴别 <span class="t-lc"><strong class="selflink">std::errc</strong></span> 值为 error_condition<br />
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<span class="t-mark">(函数模板)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div class="t-example">
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<div class="t-example-live-link"></div>
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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 <iostream></span>
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<span class="co2">#include <system_error></span>
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<span class="co2">#include <thread></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="kw1">try</span> <span class="br0">{</span>
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<a href="cpp-thread-thread.html"><span class="kw2067">std::<span class="me2">thread</span></span></a><span class="br0">(</span><span class="br0">)</span>.<span class="me1">detach</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 脱附一个非线程</span>
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<span class="br0">}</span> <span class="kw1">catch</span> <span class="br0">(</span><span class="kw4">const</span> <a href="cpp-error-system_error.html"><span class="kw880">std::<span class="me2">system_error</span></span></a><span class="sy3">&</span> e<span class="br0">)</span> <span class="br0">{</span>
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<a href="cpp-io-cout.html"><span class="kw1679">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Caught a system_error<span class="es1">\n</span>"</span><span class="sy4">;</span>
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<span class="kw1">if</span><span class="br0">(</span>e.<span class="me1">code</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> std<span class="sy4">::</span><span class="me2">errc</span><span class="sy4">::</span><span class="me2">invalid_argument</span><span class="br0">)</span>
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<a href="cpp-io-cout.html"><span class="kw1679">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"The error condition is std::errc::invalid_argument<span class="es1">\n</span>"</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1679">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"the error description is "</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>
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<span class="br0">}</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">Caught a system_error
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The error condition is std::errc::invalid_argument
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the error description is Invalid argument</pre></div>
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</div>
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</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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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-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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</table>
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</div>
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<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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