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<title>connect (9 of 12 overloads)</title>
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<div class="titlepage"><div><div><h4 class="title">
<a name="asio.reference.connect.overload9"></a><a class="link" href="overload9.html" title="connect (9 of 12 overloads)">connect (9 of 12
overloads)</a>
</h4></div></div></div>
<p>
(Deprecated: Use range overload.) Establishes a socket connection by trying
each endpoint in a sequence.
</p>
<pre class="programlisting">template<
typename <a class="link" href="../Protocol.html" title="Protocol requirements">Protocol</a>,
typename <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a>,
typename Iterator,
typename <a class="link" href="../ConnectCondition.html" title="Connect condition requirements">ConnectCondition</a>>
Iterator connect(
basic_socket< Protocol, Executor > & s,
Iterator begin,
ConnectCondition connect_condition,
typename enable_if<!is_endpoint_sequence< Iterator >::value >::type * = 0);
</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">connect</code> member
function, once for each endpoint in the sequence, until a connection is
successfully established.
</p>
<h6>
<a name="asio.reference.connect.overload9.h0"></a>
<span><a name="asio.reference.connect.overload9.parameters"></a></span><a class="link" href="overload9.html#asio.reference.connect.overload9.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>
<dt><span class="term">connect_condition</span></dt>
<dd>
<p>
A function object that is called prior to each connection attempt.
The signature of the function object must be:
</p>
<pre class="programlisting">bool connect_condition(
const asio::error_code& ec,
const typename Protocol::endpoint& next);
</pre>
<p>
The <code class="computeroutput">ec</code> parameter contains the result from the most recent
connect operation. Before the first connection attempt, <code class="computeroutput">ec</code>
is always set to indicate success. The <code class="computeroutput">next</code> parameter
is the next endpoint to be tried. The function object should return
true if the next endpoint should be tried, and false if it should
be skipped.
</p>
</dd>
</dl>
</div>
<h6>
<a name="asio.reference.connect.overload9.h1"></a>
<span><a name="asio.reference.connect.overload9.return_value"></a></span><a class="link" href="overload9.html#asio.reference.connect.overload9.return_value">Return
Value</a>
</h6>
<p>
On success, an iterator denoting the successfully connected endpoint. Otherwise,
the end iterator.
</p>
<h6>
<a name="asio.reference.connect.overload9.h2"></a>
<span><a name="asio.reference.connect.overload9.exceptions"></a></span><a class="link" href="overload9.html#asio.reference.connect.overload9.exceptions">Exceptions</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">asio::system_error</span></dt>
<dd><p>
Thrown on failure. If the sequence is empty, the associated <code class="computeroutput">error_code</code>
is <code class="computeroutput">asio::error::not_found</code>. Otherwise, contains the error
from the last connection attempt.
</p></dd>
</dl>
</div>
<h6>
<a name="asio.reference.connect.overload9.h3"></a>
<span><a name="asio.reference.connect.overload9.remarks"></a></span><a class="link" href="overload9.html#asio.reference.connect.overload9.remarks">Remarks</a>
</h6>
<p>
This overload assumes that a default constructed object of type <code class="computeroutput">Iterator</code>
represents the end of the sequence. This is a valid assumption for iterator
types such as <code class="computeroutput">asio::ip::tcp::resolver::iterator</code>.
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2020 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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