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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="boost_asio.reference.connect.overload3"></a><a class="link" href="overload3.html" title="connect (3 of 8 overloads)">connect (3
  28         of 8 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"><span class="keyword">template</span><span class="special">&lt;</span>
  34     <span class="keyword">typename</span> <a class="link" href="../Protocol.html" title="Protocol requirements">Protocol</a><span class="special">,</span>
  35     <span class="keyword">typename</span> <a class="link" href="../SocketService.html" title="Socket service requirements">SocketService</a><span class="special">,</span>
  36     <span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">&gt;</span>
  37 <span class="identifier">Iterator</span> <span class="identifier">connect</span><span class="special">(</span>
  38     <span class="identifier">basic_socket</span><span class="special">&lt;</span> <span class="identifier">Protocol</span><span class="special">,</span> <span class="identifier">SocketService</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <span class="identifier">s</span><span class="special">,</span>
  39     <span class="identifier">Iterator</span> <span class="identifier">begin</span><span class="special">,</span>
  40     <span class="identifier">Iterator</span> <span class="identifier">end</span><span class="special">);</span>
  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"><span class="identifier">connect</span></code>
  45           member function, once for each endpoint in the sequence, until a connection
  46           is successfully established.
  47         </p>
  48 <h6>
  49 <a name="boost_asio.reference.connect.overload3.h0"></a>
  50           <span class="phrase"><a name="boost_asio.reference.connect.overload3.parameters"></a></span><a class="link" href="overload3.html#boost_asio.reference.connect.overload3.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.overload3.h1"></a>
  72           <span class="phrase"><a name="boost_asio.reference.connect.overload3.return_value"></a></span><a class="link" href="overload3.html#boost_asio.reference.connect.overload3.return_value">Return Value</a>
  73         </h6>
  74 <p>
  75           On success, an iterator denoting the successfully connected endpoint. Otherwise,
  76           the end iterator.
  77         </p>
  78 <h6>
  79 <a name="boost_asio.reference.connect.overload3.h2"></a>
  80           <span class="phrase"><a name="boost_asio.reference.connect.overload3.exceptions"></a></span><a class="link" href="overload3.html#boost_asio.reference.connect.overload3.exceptions">Exceptions</a>
  81         </h6>
  82 <div class="variablelist">
  83 <p class="title"><b></b></p>
  84 <dl class="variablelist">
  85 <dt><span class="term">boost::system::system_error</span></dt>
  86 <dd><p>
  87                 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>.
  88                 Otherwise, contains the error from the last connection attempt.
  89               </p></dd>
  90 </dl>
  91 </div>
  92 <h6>
  93 <a name="boost_asio.reference.connect.overload3.h3"></a>
  94           <span class="phrase"><a name="boost_asio.reference.connect.overload3.example"></a></span><a class="link" href="overload3.html#boost_asio.reference.connect.overload3.example">Example</a>
  95         </h6>
  96 <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>
  97 <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>
  98 <span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">i</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> <span class="identifier">end</span><span class="special">;</span>
  99 <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>
 100 <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">i</span><span class="special">,</span> <span class="identifier">end</span><span class="special">);</span>
 101 </pre>
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