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| <a name="boost.log.sinks.basic_direct_mapping"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Class template basic_direct_mapping</span></h2> |
| <p>boost::log::sinks::basic_direct_mapping — Straightforward mapping. </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="../../../sinks.html#header.boost.log.sinks.attribute_mapping_hpp" title="Header <boost/log/sinks/attribute_mapping.hpp>">boost/log/sinks/attribute_mapping.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> MappedT<span class="special">,</span> <span class="keyword">typename</span> AttributeValueT <span class="special">=</span> <span class="keyword">int</span><span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="basic_direct_mapping.html" title="Class template basic_direct_mapping">basic_direct_mapping</a> <span class="special">:</span> |
| <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">log</span><span class="special">::</span><span class="identifier">sinks</span><span class="special">::</span><span class="identifier">basic_mapping</span><span class="special"><</span> <span class="identifier">MappedT</span> <span class="special">></span> |
| <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="identifier">AttributeValueT</span> <a name="boost.log.sinks.basic_direct_mapping.attribute_value_type"></a><span class="identifier">attribute_value_type</span><span class="special">;</span> <span class="comment">// Attribute contained value type. </span> |
| <span class="keyword">typedef</span> <span class="identifier">base_type</span><span class="special">::</span><span class="identifier">mapped_type</span> <a name="boost.log.sinks.basic_direct_mapping.mapped_type"></a><span class="identifier">mapped_type</span><span class="special">;</span> <span class="comment">// Mapped value type. </span> |
| |
| <span class="comment">// <a class="link" href="basic_direct_mapping.html#boost.log.sinks.basic_direct_mappingconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <span class="keyword">explicit</span> <a class="link" href="basic_direct_mapping.html#idp44208096-bb"><span class="identifier">basic_direct_mapping</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="identifier">mapped_type</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="basic_direct_mapping.html#idp44204000-bb">public member functions</a></span> |
| <span class="identifier">mapped_type</span> <a class="link" href="basic_direct_mapping.html#idp44204560-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">record_view</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="idp122997024"></a><h2>Description</h2> |
| <p>This type of mapping assumes that attribute with a particular name always provides values that map directly onto the native values. The mapping simply returns the extracted attribute value converted to the native value. </p> |
| <div class="refsect2"> |
| <a name="idp122997936"></a><h3> |
| <a name="boost.log.sinks.basic_direct_mappingconstruct-copy-destruct"></a><code class="computeroutput">basic_direct_mapping</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="idp44208096-bb"></a><span class="identifier">basic_direct_mapping</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="identifier">mapped_type</span> <span class="keyword">const</span> <span class="special">&</span> default_value<span class="special">)</span><span class="special">;</span></pre> |
| <p>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">default_value</code></span></p></td> |
| <td><p>The default native value that is returned if the attribute value is not found </p></td> |
| </tr> |
| <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="idp123014240"></a><h3> |
| <a name="idp44204000-bb"></a><code class="computeroutput">basic_direct_mapping</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="identifier">mapped_type</span> <a name="idp44204560-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&</span> rec<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>Extraction 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">rec</code></span></p></td> |
| <td><p>A log record to extract value from </p></td> |
| </tr></tbody> |
| </table></div></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>An extracted attribute value </p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li></ol></div> |
| </div> |
| </div> |
| </div> |
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| <td align="left"></td> |
| <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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