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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../utility/forward.html" title="cpp/utility/forward"><span class="t-lines"><span>forward</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../utility/move.html" title="cpp/utility/move"><span class="t-lines"><span>move</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../utility/move_if_noexcept.html" title="cpp/utility/move if noexcept"><span class="t-lines"><span>move_if_noexcept</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Type operations</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../utility/declval.html" title="cpp/utility/declval"><span class="t-lines"><span>declval</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../utility/as_const.html" title="cpp/utility/as const"><span class="t-lines"><span>as_const</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/utility/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../error.html" title="cpp/error"> Error handling</a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h2"><td colspan="5"> Exception handling</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="exception.html" title="cpp/error/exception"><span class="t-lines"><span>exception</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="uncaught_exception.html" title="cpp/error/uncaught exception"><span class="t-lines"><span>uncaught_exception</span><span>uncaught_exceptions</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="exception_ptr.html" title="cpp/error/exception ptr"><span class="t-lines"><span>exception_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="make_exception_ptr.html" title="cpp/error/make exception ptr"><span class="t-lines"><span>make_exception_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="current_exception.html" title="cpp/error/current exception"><span class="t-lines"><span>current_exception</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="rethrow_exception.html" title="cpp/error/rethrow exception"><span class="t-lines"><span>rethrow_exception</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="nested_exception.html" title="cpp/error/nested exception"><span class="t-lines"><span>nested_exception</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="throw_with_nested.html" title="cpp/error/throw with nested"><span class="t-lines"><span>throw_with_nested</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="rethrow_if_nested.html" title="cpp/error/rethrow if nested"><span class="t-lines"><span>rethrow_if_nested</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Exception handling failures</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="terminate.html" title="cpp/error/terminate"><span class="t-lines"><span>terminate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="terminate_handler.html" title="cpp/error/terminate handler"><span class="t-lines"><span>terminate_handler</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get_terminate.html" title="cpp/error/get terminate"><span class="t-lines"><span>get_terminate</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="set_terminate.html" title="cpp/error/set terminate"><span class="t-lines"><span>set_terminate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unexpected.html" title="cpp/error/unexpected"><span class="t-lines"><span>unexpected</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="bad_exception.html" title="cpp/error/bad exception"><span class="t-lines"><span>bad_exception</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unexpected_handler.html" title="cpp/error/unexpected handler"><span class="t-lines"><span>unexpected_handler</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get_unexpected.html" title="cpp/error/get unexpected"><span class="t-lines"><span>get_unexpected</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="set_unexpected.html" title="cpp/error/set unexpected"><span class="t-lines"><span>set_unexpected</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Exception categories</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="logic_error/logic_error.html" title="cpp/error/logic error"><span class="t-lines"><span>logic_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="invalid_argument/invalid_argument.html" title="cpp/error/invalid argument"><span class="t-lines"><span>invalid_argument</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="domain_error/domain_error.html" title="cpp/error/domain error"><span class="t-lines"><span>domain_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="length_error/length_error.html" title="cpp/error/length error"><span class="t-lines"><span>length_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="out_of_range/out_of_range.html" title="cpp/error/out of range"><span class="t-lines"><span>out_of_range</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="runtime_error/runtime_error.html" title="cpp/error/runtime error"><span class="t-lines"><span>runtime_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="range_error/range_error.html" title="cpp/error/range error"><span class="t-lines"><span>range_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="overflow_error/overflow_error.html" title="cpp/error/overflow error"><span class="t-lines"><span>overflow_error</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="underflow_error/underflow_error.html" title="cpp/error/underflow error"><span class="t-lines"><span>underflow_error</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Error codes</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="errno_macros.html" title="cpp/error/errno macros"> Error codes</a> </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="errno.html" title="cpp/error/errno"><span class="t-lines"><span>errno</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Assertions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="assert.html" title="cpp/error/assert"><span class="t-lines"><span>assert</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> system_error facility</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_category.html" title="cpp/error/error category"><span class="t-lines"><span>error_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="generic_category.html" title="cpp/error/generic category"><span class="t-lines"><span>generic_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="system_category.html" title="cpp/error/system category"><span class="t-lines"><span>system_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_condition.html" title="cpp/error/error condition"><span class="t-lines"><span>error_condition</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="errc.html" title="cpp/error/errc"><span class="t-lines"><span>errc</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>error_code</span></span></strong></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="system_error.html" title="cpp/error/system error"><span class="t-lines"><span>system_error</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><strong class="selflink"><tt>std::error_code</tt></strong><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> Member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/error_code.html" title="cpp/error/error code/error code"><span class="t-lines"><span>error_code::error_code</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/operator=.html" title="cpp/error/error code/operator="><span class="t-lines"><span>error_code::operator=</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/assign.html" title="cpp/error/error code/assign"><span class="t-lines"><span>error_code::assign</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Modifiers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/clear.html" title="cpp/error/error code/clear"><span class="t-lines"><span>error_code::clear</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Observers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/value.html" title="cpp/error/error code/value"><span class="t-lines"><span>error_code::value</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/category.html" title="cpp/error/error code/category"><span class="t-lines"><span>error_code::category</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/default_error_condition.html" title="cpp/error/error code/default error condition"><span class="t-lines"><span>error_code::default_error_condition</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/message.html" title="cpp/error/error code/message"><span class="t-lines"><span>error_code::message</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/operator_bool.html" title="cpp/error/error code/operator bool"><span class="t-lines"><span>error_code::operator bool</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Non-member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/operator_cmp.html" title="cpp/error/error code/operator cmp"><span class="t-lines"><span>operator<<br />operator==<br />operator!=</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/operator_ltlt.html" title="cpp/error/error code/operator ltlt"><span class="t-lines"><span>operator<<</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Helper classes</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/is_error_code_enum.html" title="cpp/error/error code/is error code enum"><span class="t-lines"><span>is_error_code_enum</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_code/hash.html" title="cpp/error/error code/hash"><span class="t-lines"><span>hash<span class="t-dsc-small"><std::error_code></span></span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>Defined in header <code><a href="../header/system_error.html" title="cpp/header/system error"><system_error></a></code>
</div></td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> error_code<span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p><code>std::error_code</code> is a platform-dependent error code. Each <code>std::error_code</code> object holds a pair of error code originating from the operating system, or some low-level interface and a pointer to an object of type <span class="t-lc">std::error_category</span>, which corresponds to the said interface. The error code values may be not unique across different error categories.
</p>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="error_code.html#Member_functions"><span class="tocnumber">1</span> <span class="toctext">Member functions</span></a>
<ul>
<li class="toclevel-2"><a href="error_code.html#Modifiers"><span class="tocnumber">1.1</span> <span class="toctext">Modifiers</span></a></li>
<li class="toclevel-2"><a href="error_code.html#Observers"><span class="tocnumber">1.2</span> <span class="toctext">Observers</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-2"><a href="error_code.html#Non-member_functions"><span class="tocnumber">2</span> <span class="toctext">Non-member functions</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="error_code.html#Helper_classes"><span class="tocnumber">3</span> <span class="toctext">Helper classes</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="error_code.html#See_also"><span class="tocnumber">4</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/error/error_code&action=edit&section=1" title="Edit section: Member functions">edit</a>]</span> <span class="mw-headline" id="Member_functions">Member functions</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="error_code/error_code.html" title="cpp/error/error code/error code"> <span class="t-lines"><span>(constructor)</span></span></a></div></div>
</td>
<td> constructs an error code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_constructor&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/operator=.html" title="cpp/error/error code/operator="> <span class="t-lines"><span>operator=</span></span></a></div></div>
</td>
<td> assigns another error code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_operator%3D&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/assign.html" title="cpp/error/error code/assign"> <span class="t-lines"><span>assign</span></span></a></div></div>
</td>
<td> assigns another error code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_assign&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Modifiers"> Modifiers </span></h5>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/clear.html" title="cpp/error/error code/clear"> <span class="t-lines"><span>clear</span></span></a></div></div>
</td>
<td> sets the error_code to value 0 in system_category <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_clear&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Observers"> Observers </span></h5>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/value.html" title="cpp/error/error code/value"> <span class="t-lines"><span>value</span></span></a></div></div>
</td>
<td> obtains the value of the error_code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_value&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/category.html" title="cpp/error/error code/category"> <span class="t-lines"><span>category</span></span></a></div></div>
</td>
<td> obtains the error_category for this error_code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_category&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/default_error_condition.html" title="cpp/error/error code/default error condition"> <span class="t-lines"><span>default_error_condition</span></span></a></div></div>
</td>
<td> obtains the error_condition for this error_code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_default_error_condition&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/message.html" title="cpp/error/error code/message"> <span class="t-lines"><span>message</span></span></a></div></div>
</td>
<td> obtains the explanatory string for this error_code <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_message&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/operator_bool.html" title="cpp/error/error code/operator bool"> <span class="t-lines"><span>operator bool</span></span></a></div></div>
</td>
<td> checks if the value is non-zero <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_operator_bool&action=edit">[edit]</a></span>
</td></tr>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/error/error_code&action=edit&section=2" title="Edit section: Non-member functions">edit</a>]</span> <span class="mw-headline" id="Non-member_functions">Non-member functions</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/operator_cmp.html" title="cpp/error/error code/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator<</span></span></a></div></div>
</td>
<td> compares two <code>error_code</code>s <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_operator_cmp&action=edit">[edit]</a></span>
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<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/operator_ltlt.html" title="cpp/error/error code/operator ltlt"> <span class="t-lines"><span>operator<<</span></span></a></div></div>
</td>
<td> outputs the value and the category name to an output stream <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_operator_ltlt&action=edit">[edit]</a></span>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/error/error_code&action=edit&section=3" title="Edit section: Helper classes">edit</a>]</span> <span class="mw-headline" id="Helper_classes">Helper classes</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/is_error_code_enum.html" title="cpp/error/error code/is error code enum"> <span class="t-lines"><span>is_error_code_enum</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td> identifies a class as an error_code enumeration <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_is_error_code_enum&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_code/hash.html" title="cpp/error/error code/hash"> <span class="t-lines"><span>std::hash<span class="t-dsc-small"><std::error_code></span></span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td> hash support for <span class="t-lc">std::error_code</span> <br /> <span class="t-mark">(class template specialization)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/error_code/dsc_hash&action=edit">[edit]</a></span>
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<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/error/error_code&action=edit&section=4" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_condition.html" title="cpp/error/error condition"> <span class="t-lines"><span>error_condition</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td> holds a portable error code <br /> <span class="t-mark">(class)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/dsc_error_condition&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="error_category.html" title="cpp/error/error category"> <span class="t-lines"><span>error_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td> base class for error categories <br /> <span class="t-mark">(class)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/error/dsc_error_category&action=edit">[edit]</a></span>
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