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<title>execution::execute</title>
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
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<div class="titlepage"><div><div><h3 class="title">
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<a name="asio.reference.execution__execute"></a><a class="link" href="execution__execute.html" title="execution::execute">execution::execute</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="asio.indexterm.execution__execute"></a>
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A customisation point
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that executes a function on an executor.
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</p>
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<pre class="programlisting">constexpr unspecified execute = unspecified;
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</pre>
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<p>
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The name <code class="computeroutput">execution::execute</code> denotes a customisation point object.
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</p>
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<p>
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For some subexpressions <code class="computeroutput">e</code> and <code class="computeroutput">f</code>, let <code class="computeroutput">E</code>
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be a type such that <code class="computeroutput">decltype((e))</code> is <code class="computeroutput">E</code> and let
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<code class="computeroutput">F</code> be a type such that <code class="computeroutput">decltype((f))</code> is <code class="computeroutput">F</code>.
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The expression <code class="computeroutput">execution::execute(e, f)</code> is ill-formed if <code class="computeroutput">F</code>
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does not model <code class="computeroutput">invocable</code>, or if <code class="computeroutput">E</code> does not model
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either <code class="computeroutput">executor</code> or <code class="computeroutput">sender</code>. Otherwise, it is expression-equivalent
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to:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem">
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<code class="computeroutput">e.execute(f)</code>, if that expression is valid. If the function
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selected does not execute the function object <code class="computeroutput">f</code> on the executor
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<code class="computeroutput">e</code>, the program is ill-formed with no diagnostic required.
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</li>
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<li class="listitem">
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Otherwise, <code class="computeroutput">execute(e, f)</code>, if that expression is valid, with
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overload resolution performed in a context that includes the declaration
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<code class="computeroutput">void execute();</code> and that does not include a declaration
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of <code class="computeroutput">execution::execute</code>. If the function selected by overload
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resolution does not execute the function object <code class="computeroutput">f</code> on the
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executor <code class="computeroutput">e</code>, the program is ill-formed with no diagnostic
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required.
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</li>
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</ul></div>
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<h5>
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<a name="asio.reference.execution__execute.h0"></a>
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<span><a name="asio.reference.execution__execute.requirements"></a></span><a class="link" href="execution__execute.html#asio.reference.execution__execute.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">asio/execution/execute.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">asio/execution.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 © 2003-2020 Christopher M.
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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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</p>
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