1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>connect (5 of 12 overloads)</title> 5<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../connect.html" title="connect"> 9<link rel="prev" href="overload4.html" title="connect (4 of 12 overloads)"> 10<link rel="next" href="overload6.html" title="connect (6 of 12 overloads)"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="overload4.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../connect.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload6.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="boost_asio.reference.connect.overload5"></a><a class="link" href="overload5.html" title="connect (5 of 12 overloads)">connect (5 28 of 12 overloads)</a> 29</h4></div></div></div> 30<p> 31 Establishes a socket connection by trying each endpoint in a sequence. 32 </p> 33<pre class="programlisting">template< 34 typename <a class="link" href="../Protocol.html" title="Protocol requirements">Protocol</a>, 35 typename <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a>, 36 typename Iterator> 37Iterator connect( 38 basic_socket< Protocol, Executor > & s, 39 Iterator begin, 40 Iterator end); 41</pre> 42<p> 43 This function attempts to connect a socket to one of a sequence of endpoints. 44 It does this by repeated calls to the socket's <code class="computeroutput">connect</code> member 45 function, once for each endpoint in the sequence, until a connection is 46 successfully established. 47 </p> 48<h6> 49<a name="boost_asio.reference.connect.overload5.h0"></a> 50 <span class="phrase"><a name="boost_asio.reference.connect.overload5.parameters"></a></span><a class="link" href="overload5.html#boost_asio.reference.connect.overload5.parameters">Parameters</a> 51 </h6> 52<div class="variablelist"> 53<p class="title"><b></b></p> 54<dl class="variablelist"> 55<dt><span class="term">s</span></dt> 56<dd><p> 57 The socket to be connected. If the socket is already open, it will 58 be closed. 59 </p></dd> 60<dt><span class="term">begin</span></dt> 61<dd><p> 62 An iterator pointing to the start of a sequence of endpoints. 63 </p></dd> 64<dt><span class="term">end</span></dt> 65<dd><p> 66 An iterator pointing to the end of a sequence of endpoints. 67 </p></dd> 68</dl> 69</div> 70<h6> 71<a name="boost_asio.reference.connect.overload5.h1"></a> 72 <span class="phrase"><a name="boost_asio.reference.connect.overload5.return_value"></a></span><a class="link" href="overload5.html#boost_asio.reference.connect.overload5.return_value">Return Value</a> 73 </h6> 74<p> 75 An iterator denoting the successfully connected endpoint. 76 </p> 77<h6> 78<a name="boost_asio.reference.connect.overload5.h2"></a> 79 <span class="phrase"><a name="boost_asio.reference.connect.overload5.exceptions"></a></span><a class="link" href="overload5.html#boost_asio.reference.connect.overload5.exceptions">Exceptions</a> 80 </h6> 81<div class="variablelist"> 82<p class="title"><b></b></p> 83<dl class="variablelist"> 84<dt><span class="term">boost::system::system_error</span></dt> 85<dd><p> 86 Thrown on failure. If the sequence is empty, the associated <code class="computeroutput">error_code</code> 87 is <code class="computeroutput">boost::asio::error::not_found</code>. Otherwise, contains 88 the error from the last connection attempt. 89 </p></dd> 90</dl> 91</div> 92<h6> 93<a name="boost_asio.reference.connect.overload5.h3"></a> 94 <span class="phrase"><a name="boost_asio.reference.connect.overload5.example"></a></span><a class="link" href="overload5.html#boost_asio.reference.connect.overload5.example">Example</a> 95 </h6> 96<pre class="programlisting">tcp::resolver r(my_context); 97tcp::resolver::query q("host", "service"); 98tcp::resolver::results_type e = r.resolve(q); 99tcp::socket s(my_context); 100boost::asio::connect(s, e.begin(), e.end()); 101</pre> 102</div> 103<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 104<td align="left"></td> 105<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 106 Kohlhoff<p> 107 Distributed under the Boost Software License, Version 1.0. (See accompanying 108 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>) 109 </p> 110</div></td> 111</tr></table> 112<hr> 113<div class="spirit-nav"> 114<a accesskey="p" href="overload4.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../connect.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload6.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 115</div> 116</body> 117</html> 118
