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<title>Move accept handler requirements</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.MoveAcceptHandler"></a><a class="link" href="MoveAcceptHandler.html" title="Move accept handler requirements">Move accept handler
requirements</a>
</h3></div></div></div>
<p>
A move accept handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
A value <code class="computeroutput">h</code> of a move accept handler class should work correctly
in the expression <code class="computeroutput">h(ec, s)</code>, where <code class="computeroutput">ec</code> is an lvalue
of type <code class="computeroutput">const error_code</code> and <code class="computeroutput">s</code> is an lvalue of
the nested type <code class="computeroutput">Protocol::socket</code> for the type <code class="computeroutput">Protocol</code>
of the socket class template.
</p>
<h5>
<a name="boost_asio.reference.MoveAcceptHandler.h0"></a>
<span class="phrase"><a name="boost_asio.reference.MoveAcceptHandler.examples"></a></span><a class="link" href="MoveAcceptHandler.html#boost_asio.reference.MoveAcceptHandler.examples">Examples</a>
</h5>
<p>
A free function as a move accept handler:
</p>
<pre class="programlisting">void accept_handler(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
}
</pre>
<p>
A move accept handler function object:
</p>
<pre class="programlisting">struct accept_handler
{
...
void operator()(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
}
...
};
</pre>
<p>
A lambda as a move accept handler:
</p>
<pre class="programlisting">acceptor.async_accept(...,
[](const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
});
</pre>
<p>
A non-static class member function adapted to a move accept handler using
<code class="computeroutput">std::bind()</code>:
</p>
<pre class="programlisting">void my_class::accept_handler(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket socket)
{
...
}
...
boost::asio::async_accept(...,
std::bind(&my_class::accept_handler,
this, std::placeholders::_1,
std::placeholders::_2));
</pre>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2018 Christopher M. Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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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