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<a name="asio.reference.ip__basic_resolver.async_resolve.overload1"></a><a class="link" href="overload1.html" title="ip::basic_resolver::async_resolve (1 of 2 overloads)">
ip::basic_resolver::async_resolve (1 of 2 overloads)</a>
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<p>
Asynchronously perform forward resolution of a query to a list of entries.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="../../ResolveHandler.html" title="Resolve handler requirements">ResolveHandler</a><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">async_resolve</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">query</span> <span class="special">&</span> <span class="identifier">q</span><span class="special">,</span>
<span class="identifier">ResolveHandler</span> <span class="identifier">handler</span><span class="special">);</span>
</pre>
<p>
This function is used to asynchronously resolve a query into a list of
endpoint entries.
</p>
<a name="asio.reference.ip__basic_resolver.async_resolve.overload1.parameters"></a><h6>
<a name="id871660"></a>
<a class="link" href="overload1.html#asio.reference.ip__basic_resolver.async_resolve.overload1.parameters">Parameters</a>
</h6>
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<p class="title"><b></b></p>
<dl>
<dt><span class="term">q</span></dt>
<dd><p>
A query object that determines what endpoints will be returned.
</p></dd>
<dt><span class="term">handler</span></dt>
<dd>
<p>
The handler to be called when the resolve 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="special">,</span> <span class="comment">// Result of operation.
</span> <span class="identifier">resolver</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">iterator</span> <span class="comment">// Forward-only iterator that can
</span> <span class="comment">// be used to traverse the list
</span> <span class="comment">// of endpoint entries.
</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>
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<a name="asio.reference.ip__basic_resolver.async_resolve.overload1.remarks"></a><h6>
<a name="id871854"></a>
<a class="link" href="overload1.html#asio.reference.ip__basic_resolver.async_resolve.overload1.remarks">Remarks</a>
</h6>
<p>
A default constructed iterator represents the end of the list.
</p>
<p>
A successful resolve operation is guaranteed to pass at least one entry
to the handler.
</p>
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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>)
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