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<title>connect (1 of 8 overloads)</title>
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<div class="titlepage"><div><div><h4 class="title">
<a name="boost_asio.reference.connect.overload1"></a><a class="link" href="overload1.html" title="connect (1 of 8 overloads)">connect (1
of 8 overloads)</a>
</h4></div></div></div>
<p>
Establishes a socket connection by trying each endpoint in a sequence.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="../Protocol.html" title="Protocol requirements">Protocol</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="../SocketService.html" title="Socket service requirements">SocketService</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span>
<span class="identifier">Iterator</span> <span class="identifier">connect</span><span class="special">(</span>
<span class="identifier">basic_socket</span><span class="special"><</span> <span class="identifier">Protocol</span><span class="special">,</span> <span class="identifier">SocketService</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">Iterator</span> <span class="identifier">begin</span><span class="special">);</span>
</pre>
<p>
This function attempts to connect a socket to one of a sequence of endpoints.
It does this by repeated calls to the socket's <code class="computeroutput"><span class="identifier">connect</span></code>
member function, once for each endpoint in the sequence, until a connection
is successfully established.
</p>
<h6>
<a name="boost_asio.reference.connect.overload1.h0"></a>
<span><a name="boost_asio.reference.connect.overload1.parameters"></a></span><a class="link" href="overload1.html#boost_asio.reference.connect.overload1.parameters">Parameters</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">s</span></dt>
<dd><p>
The socket to be connected. If the socket is already open, it will
be closed.
</p></dd>
<dt><span class="term">begin</span></dt>
<dd><p>
An iterator pointing to the start of a sequence of endpoints.
</p></dd>
</dl>
</div>
<h6>
<a name="boost_asio.reference.connect.overload1.h1"></a>
<span><a name="boost_asio.reference.connect.overload1.return_value"></a></span><a class="link" href="overload1.html#boost_asio.reference.connect.overload1.return_value">Return Value</a>
</h6>
<p>
On success, an iterator denoting the successfully connected endpoint. Otherwise,
the end iterator.
</p>
<h6>
<a name="boost_asio.reference.connect.overload1.h2"></a>
<span><a name="boost_asio.reference.connect.overload1.exceptions"></a></span><a class="link" href="overload1.html#boost_asio.reference.connect.overload1.exceptions">Exceptions</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">boost::system::system_error</span></dt>
<dd><p>
Thrown on failure. If the sequence is empty, the associated <code class="computeroutput"><span class="identifier">error_code</span></code> is <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error</span><span class="special">::</span><span class="identifier">not_found</span></code>.
Otherwise, contains the error from the last connection attempt.
</p></dd>
</dl>
</div>
<h6>
<a name="boost_asio.reference.connect.overload1.h3"></a>
<span><a name="boost_asio.reference.connect.overload1.remarks"></a></span><a class="link" href="overload1.html#boost_asio.reference.connect.overload1.remarks">Remarks</a>
</h6>
<p>
This overload assumes that a default constructed object of type <code class="computeroutput"><span class="identifier">Iterator</span></code> represents the end of the sequence.
This is a valid assumption for iterator types such as <code class="computeroutput"><span class="identifier">boost</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">resolver</span><span class="special">::</span><span class="identifier">iterator</span></code>.
</p>
<h6>
<a name="boost_asio.reference.connect.overload1.h4"></a>
<span><a name="boost_asio.reference.connect.overload1.example"></a></span><a class="link" href="overload1.html#boost_asio.reference.connect.overload1.example">Example</a>
</h6>
<pre class="programlisting"><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span> <span class="identifier">r</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
<span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span><span class="special">::</span><span class="identifier">query</span> <span class="identifier">q</span><span class="special">(</span><span class="string">"host"</span><span class="special">,</span> <span class="string">"service"</span><span class="special">);</span>
<span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">s</span><span class="special">(</span><span class="identifier">io_service</span><span class="special">);</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">connect</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">r</span><span class="special">.</span><span class="identifier">resolve</span><span class="special">(</span><span class="identifier">q</span><span class="special">));</span>
</pre>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2012 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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