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<div class="titlepage"><div><div><h4 class="title">
<a name="asio.reference.basic_socket_streambuf.async_connect"></a><a class="link" href="async_connect.html" title="basic_socket_streambuf::async_connect">basic_socket_streambuf::async_connect</a>
</h4></div></div></div>
<p>
<span class="emphasis"><em>Inherited from basic_socket.</em></span>
</p>
<p>
<a class="indexterm" name="id881529"></a>
Start an asynchronous connect.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="../ConnectHandler.html" title="Connect handler requirements">ConnectHandler</a><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">async_connect</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">endpoint_type</span> <span class="special">&</span> <span class="identifier">peer_endpoint</span><span class="special">,</span>
<span class="identifier">ConnectHandler</span> <span class="identifier">handler</span><span class="special">);</span>
</pre>
<p>
This function is used to asynchronously connect a socket to the specified
remote endpoint. The function call always returns immediately.
</p>
<p>
The socket is automatically opened if it is not already open. If the connect
fails, and the socket was automatically opened, the socket is not returned
to the closed state.
</p>
<a name="asio.reference.basic_socket_streambuf.async_connect.parameters"></a><h6>
<a name="id881649"></a>
<a class="link" href="async_connect.html#asio.reference.basic_socket_streambuf.async_connect.parameters">Parameters</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">peer_endpoint</span></dt>
<dd><p>
The remote endpoint to which the socket will be connected. Copies
will be made of the endpoint object as required.
</p></dd>
<dt><span class="term">handler</span></dt>
<dd>
<p>
The handler to be called when the connection operation completes.
Copies will be made of the handler as required. The function signature
of the handler must be:
</p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span> <span class="comment">// Result of operation
</span><span class="special">);</span>
</pre>
<p>
Regardless of whether the asynchronous operation completes immediately
or not, the handler will not be invoked from within this function.
Invocation of the handler will be performed in a manner equivalent
to using <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">post</span><span class="special">()</span></code>.
</p>
</dd>
</dl>
</div>
<a name="asio.reference.basic_socket_streambuf.async_connect.example"></a><h6>
<a name="id881801"></a>
<a class="link" href="async_connect.html#asio.reference.basic_socket_streambuf.async_connect.example">Example</a>
</h6>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">connect_handler</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span><span class="special">)</span>
<span class="special">{</span>
<span class="keyword">if</span> <span class="special">(!</span><span class="identifier">error</span><span class="special">)</span>
<span class="special">{</span>
<span class="comment">// Connect succeeded.
</span> <span class="special">}</span>
<span class="special">}</span>
<span class="special">...</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">socket</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">endpoint</span> <span class="identifier">endpoint</span><span class="special">(</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">ip</span><span class="special">::</span><span class="identifier">address</span><span class="special">::</span><span class="identifier">from_string</span><span class="special">(</span><span class="string">"1.2.3.4"</span><span class="special">),</span> <span class="number">12345</span><span class="special">);</span>
<span class="identifier">socket</span><span class="special">.</span><span class="identifier">async_connect</span><span class="special">(</span><span class="identifier">endpoint</span><span class="special">,</span> <span class="identifier">connect_handler</span><span class="special">);</span>
</pre>
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<td align="right"><div class="copyright-footer">Copyright © 2003 - 2010 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>)
</p>
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