1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>ip::basic_resolver::async_resolve (6 of 6 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="../async_resolve.html" title="ip::basic_resolver::async_resolve"> 9<link rel="prev" href="overload5.html" title="ip::basic_resolver::async_resolve (5 of 6 overloads)"> 10<link rel="next" href="../basic_resolver.html" title="ip::basic_resolver::basic_resolver"> 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="overload5.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_resolve.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="../basic_resolver.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="boost_asio.reference.ip__basic_resolver.async_resolve.overload6"></a><a class="link" href="overload6.html" title="ip::basic_resolver::async_resolve (6 of 6 overloads)">ip::basic_resolver::async_resolve 28 (6 of 6 overloads)</a> 29</h5></div></div></div> 30<p> 31 Asynchronously perform reverse resolution of an endpoint to a list of 32 entries. 33 </p> 34<pre class="programlisting">template< 35 typename <a class="link" href="../../ResolveHandler.html" title="Resolve handler requirements">ResolveHandler</a> = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>> 36<a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_resolve( 37 const endpoint_type & e, 38 ResolveHandler && handler = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>); 39</pre> 40<p> 41 This function is used to asynchronously resolve an endpoint into a list 42 of endpoint entries. 43 </p> 44<h6> 45<a name="boost_asio.reference.ip__basic_resolver.async_resolve.overload6.h0"></a> 46 <span class="phrase"><a name="boost_asio.reference.ip__basic_resolver.async_resolve.overload6.parameters"></a></span><a class="link" href="overload6.html#boost_asio.reference.ip__basic_resolver.async_resolve.overload6.parameters">Parameters</a> 47 </h6> 48<div class="variablelist"> 49<p class="title"><b></b></p> 50<dl class="variablelist"> 51<dt><span class="term">e</span></dt> 52<dd><p> 53 An endpoint object that determines what endpoints will be returned. 54 </p></dd> 55<dt><span class="term">handler</span></dt> 56<dd> 57<p> 58 The handler to be called when the resolve operation completes. 59 Copies will be made of the handler as required. The function signature 60 of the handler must be: 61</p> 62<pre class="programlisting">void handler( 63 const boost::system::error_code& error, // Result of operation. 64 resolver::results_type results // Resolved endpoints as a range. 65); 66</pre> 67<p> 68 Regardless of whether the asynchronous operation completes immediately 69 or not, the handler will not be invoked from within this function. 70 On immediate completion, invocation of the handler will be performed 71 in a manner equivalent to using <a class="link" href="../../post.html" title="post"><code class="computeroutput">post</code></a>. 72 </p> 73</dd> 74</dl> 75</div> 76<p> 77 A successful resolve operation is guaranteed to pass a non-empty range 78 to the handler. 79 </p> 80</div> 81<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 82<td align="left"></td> 83<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 84 Kohlhoff<p> 85 Distributed under the Boost Software License, Version 1.0. (See accompanying 86 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>) 87 </p> 88</div></td> 89</tr></table> 90<hr> 91<div class="spirit-nav"> 92<a accesskey="p" href="overload5.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_resolve.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="../basic_resolver.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 93</div> 94</body> 95</html> 96
