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| <h2><span class="refentrytitle">Class template has_attribute</span></h2> |
| <p>boost::log::expressions::has_attribute</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: <<a class="link" href="../../../expressions.html#header.boost.log.expressions.predicates.has_attr_hpp" title="Header <boost/log/expressions/predicates/has_attr.hpp>">boost/log/expressions/predicates/has_attr.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="has_attribute.html" title="Class template has_attribute">has_attribute</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="keyword">bool</span> <a name="boost.log.expressions.has_attribute.result_type"></a><span class="identifier">result_type</span><span class="special">;</span> <span class="comment">// Function result_type. </span> |
| <span class="keyword">typedef</span> <span class="identifier">T</span> <a name="boost.log.expressions.has_attribute.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> <span class="comment">// Expected attribute value type. </span> |
| |
| <span class="comment">// <a class="link" href="has_attribute.html#boost.log.expressions.has_attributeconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <span class="keyword">explicit</span> <a class="link" href="has_attribute.html#idp43446096-bb"><span class="identifier">has_attribute</span></a><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="has_attribute.html#idp43440368-bb">public member functions</a></span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ArgT<span class="special">></span> <span class="identifier">result_type</span> <a class="link" href="has_attribute.html#idp43440928-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">ArgT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="idp117984976"></a><h2>Description</h2> |
| <p>An attribute value presence checker. </p> |
| <div class="refsect2"> |
| <a name="idp117985696"></a><h3> |
| <a name="boost.log.expressions.has_attributeconstruct-copy-destruct"></a><code class="computeroutput">has_attribute</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp43446096-bb"></a><span class="identifier">has_attribute</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span> name<span class="special">)</span><span class="special">;</span></pre> |
| <p>Initializing constructor</p> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Parameters:</span></p></td> |
| <td><div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><code class="computeroutput">name</code></span></p></td> |
| <td><p>Attribute name </p></td> |
| </tr></tbody> |
| </table></div></td> |
| </tr></tbody> |
| </table></div> |
| </li></ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="idp117997600"></a><h3> |
| <a name="idp43440368-bb"></a><code class="computeroutput">has_attribute</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ArgT<span class="special">></span> <span class="identifier">result_type</span> <a name="idp43440928-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">ArgT</span> <span class="keyword">const</span> <span class="special">&</span> arg<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Checking operator</p> |
| <p> |
| |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Parameters:</span></p></td> |
| <td><div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term"><code class="computeroutput">arg</code></span></p></td> |
| <td><p>A set of attribute values or a log record </p></td> |
| </tr></tbody> |
| </table></div></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p><code class="computeroutput">true</code> if the log record contains the sought attribute value, <code class="computeroutput">false</code> otherwise </p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li></ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="idp118016032"></a><h3>Specializations</h3> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><a class="link" href="has_attribute__idp43448480.html" title="Class has_attribute<void>">Class has_attribute<void></a></p></li></ul></div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2007-2015 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>). |
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