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67 lines
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<title>uses_executor</title>
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<link rel="prev" href="use_future_t/use_future_t/overload2.html" title="use_future_t::use_future_t (2 of 2 overloads)">
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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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<a accesskey="p" href="use_future_t/use_future_t/overload2.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="wait_traits.html"><img src="../../next.png" alt="Next"></a>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="asio.reference.uses_executor"></a><a class="link" href="uses_executor.html" title="uses_executor">uses_executor</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="asio.indexterm.uses_executor"></a>
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</p>
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<p>
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The <a class="link" href="uses_executor.html" title="uses_executor"><code class="computeroutput"><span class="identifier">uses_executor</span></code></a>
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trait detects whether a type T has an associated executor that is convertible
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from type Executor.
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</p>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span>
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<span class="keyword">typename</span> <a class="link" href="Executor1.html" title="Executor requirements">Executor</a><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">uses_executor</span> <span class="special">:</span>
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<span class="keyword">public</span> <span class="identifier">false_type</span>
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</pre>
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<p>
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Meets the BinaryTypeTrait requirements. The Asio library provides a definition
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that is derived from <code class="computeroutput"><span class="identifier">false_type</span></code>.
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A program may specialize this template to derive from true_type for a user-defined
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type T that can be constructed with an executor, where the first argument
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of a constructor has type <a class="link" href="executor_arg_t.html" title="executor_arg_t"><code class="computeroutput"><span class="identifier">executor_arg_t</span></code></a> and the second argument
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is convertible from type Executor.
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</p>
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<h5>
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<a name="asio.reference.uses_executor.h0"></a>
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<span><a name="asio.reference.uses_executor.requirements"></a></span><a class="link" href="uses_executor.html#asio.reference.uses_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">asio/uses_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">asio.hpp</code>
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</p>
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</div>
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<div class="copyright-footer">Copyright © 2003-2023 Christopher 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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</p>
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</div>
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<hr>
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