libs/log/doc/html/boost/log/sinks/has_requirement.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Struct template has_requirement</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="../../../index.html" title="Chapter&#160;1.&#160;Boost.Log v2">
<link rel="up" href="../../../sinks.html#header.boost.log.sinks.frontend_requirements_hpp" title="Header &lt;boost/log/sinks/frontend_requirements.hpp&gt;">
<link rel="prev" href="combine_requirements.html" title="Struct template combine_requirements">
<link rel="next" href="../../../BOOST_LOG_COMBINE_REQUIREMENTS_LIMIT.html" title="Macro BOOST_LOG_COMBINE_REQUIREMENTS_LIMIT">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td></tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="combine_requirements.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../sinks.html#header.boost.log.sinks.frontend_requirements_hpp"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../../BOOST_LOG_COMBINE_REQUIREMENTS_LIMIT.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="refentry">
<a name="boost.log.sinks.has_requirement"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template has_requirement</span></h2>
<p>boost::log::sinks::has_requirement</p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../sinks.html#header.boost.log.sinks.frontend_requirements_hpp" title="Header &lt;boost/log/sinks/frontend_requirements.hpp&gt;">boost/log/sinks/frontend_requirements.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TestedT<span class="special">,</span> <span class="keyword">typename</span> RequiredT<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="has_requirement.html" title="Struct template has_requirement">has_requirement</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">is_base_of</span><span class="special">&lt;</span> <span class="identifier">RequiredT</span><span class="special">,</span> <span class="identifier">TestedT</span> <span class="special">&gt;</span> <span class="special">{</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp108674832"></a><h2>Description</h2>
<p>A helper metafunction to check if a requirement is satisfied. The <code class="computeroutput">TestedT</code> template argument should be the type combining one or several requirements and <code class="computeroutput">RequiredT</code> is the requirement to test against. The metafunction will yield a positive result if <code class="computeroutput">TestedT</code> supports <code class="computeroutput">RequiredT</code>. </p>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2007-2014 Andrey Semashev<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></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="combine_requirements.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../sinks.html#header.boost.log.sinks.frontend_requirements_hpp"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../../BOOST_LOG_COMBINE_REQUIREMENTS_LIMIT.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>