<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>query_result</title> <link rel="stylesheet" href="../../boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../../index.html" title="Asio"> <link rel="up" href="../reference.html" title="Reference"> <link rel="prev" href="query.html" title="query"> <link rel="next" href="query_result/type.html" title="query_result::type"> <meta name="viewport" content="width=device-width, initial-scale=1"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="query.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="query_result/type.html"><img src="../../next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> <a name="asio.reference.query_result"></a><a class="link" href="query_result.html" title="query_result">query_result</a> </h3></div></div></div> <p> <a class="indexterm" name="asio.indexterm.query_result"></a> </p> <p> A type trait that determines the result type of a <code class="computeroutput"><span class="identifier">query</span></code> expression. </p> <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Property</span><span class="special">></span> <span class="keyword">struct</span> <span class="identifier">query_result</span> </pre> <h5> <a name="asio.reference.query_result.h0"></a> <span><a name="asio.reference.query_result.types"></a></span><a class="link" href="query_result.html#asio.reference.query_result.types">Types</a> </h5> <div class="informaltable"><table class="table"> <colgroup> <col> <col> </colgroup> <thead><tr> <th> <p> Name </p> </th> <th> <p> Description </p> </th> </tr></thead> <tbody><tr> <td> <p> <a class="link" href="query_result/type.html" title="query_result::type"><span class="bold"><strong>type</strong></span></a> </p> </td> <td> <p> The result of the query expression. </p> </td> </tr></tbody> </table></div> <p> Class template <code class="computeroutput"><span class="identifier">query_result</span></code> is a trait that determines the result type of the expression <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">declval</span><span class="special"><</span><span class="identifier">T</span><span class="special">>(),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">declval</span><span class="special"><</span><span class="identifier">Property</span><span class="special">>())</span></code>. </p> <h5> <a name="asio.reference.query_result.h1"></a> <span><a name="asio.reference.query_result.requirements"></a></span><a class="link" href="query_result.html#asio.reference.query_result.requirements">Requirements</a> </h5> <p> <span class="emphasis"><em>Header: </em></span><code class="literal">asio/query.hpp</code> </p> <p> <span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code> </p> </div> <div class="copyright-footer">Copyright © 2003-2023 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>) </p> </div> <hr> <div class="spirit-nav"> <a accesskey="p" href="query.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="query_result/type.html"><img src="../../next.png" alt="Next"></a> </div> </body> </html>