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161 lines
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_asio.reference.associated_executor"></a><a class="link" href="associated_executor.html" title="associated_executor">associated_executor</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="boost_asio.indexterm.associated_executor"></a>
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</p>
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<p>
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Traits type used to obtain the executor associated with an object.
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</p>
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<pre class="programlisting">template<
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typename T,
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typename <a class="link" href="Executor1.html" title="Executor requirements">Executor</a> = system_executor>
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struct associated_executor
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</pre>
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<h5>
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<a name="boost_asio.reference.associated_executor.h0"></a>
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<span class="phrase"><a name="boost_asio.reference.associated_executor.types"></a></span><a class="link" href="associated_executor.html#boost_asio.reference.associated_executor.types">Types</a>
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<div class="informaltable"><table class="table">
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Name
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Description
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<a class="link" href="associated_executor/type.html" title="associated_executor::type"><span class="bold"><strong>type</strong></span></a>
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<p>
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If T has a nested type executor_type, T::executor_type. Otherwise
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Executor.
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</p>
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</td>
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</table></div>
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<h5>
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<a name="boost_asio.reference.associated_executor.h1"></a>
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<span class="phrase"><a name="boost_asio.reference.associated_executor.member_functions"></a></span><a class="link" href="associated_executor.html#boost_asio.reference.associated_executor.member_functions">Member
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Functions</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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Name
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Description
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<p>
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<a class="link" href="associated_executor/get.html" title="associated_executor::get"><span class="bold"><strong>get</strong></span></a> <span class="silver">[static]</span>
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</p>
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<td>
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<p>
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If T has a nested type executor_type, returns t.get_executor().
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Otherwise returns ex.
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</p>
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<p>
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A program may specialise this traits type if the <code class="computeroutput">T</code> template
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parameter in the specialisation is a user-defined type. The template parameter
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<code class="computeroutput">Executor</code> shall be a type meeting the Executor requirements.
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</p>
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<p>
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Specialisations shall meet the following requirements, where <code class="computeroutput">t</code>
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is a const reference to an object of type <code class="computeroutput">T</code>, and <code class="computeroutput">e</code>
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is an object of type <code class="computeroutput">Executor</code>.
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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Provide a nested typedef <code class="computeroutput">type</code> that identifies a type meeting
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the Executor requirements.
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</li>
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<li class="listitem">
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Provide a noexcept static member function named <code class="computeroutput">get</code>, callable
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as <code class="computeroutput">get(t)</code> and with return type <code class="computeroutput">type</code>.
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</li>
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<li class="listitem">
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Provide a noexcept static member function named <code class="computeroutput">get</code>, callable
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as <code class="computeroutput">get(t,e)</code> and with return type <code class="computeroutput">type</code>.
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</li>
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</ul></div>
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<h5>
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<a name="boost_asio.reference.associated_executor.h2"></a>
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<span class="phrase"><a name="boost_asio.reference.associated_executor.requirements"></a></span><a class="link" href="associated_executor.html#boost_asio.reference.associated_executor.requirements">Requirements</a>
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</h5>
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<p>
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<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/associated_executor.hpp</code>
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</p>
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<p>
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<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
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</p>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
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M. Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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