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nest-open-source / nest-cam / 4320010 / boost / 62d1066a6d52d5ac4e10c106f0eab14c820be0ce / . / boost / libs / log / doc / html / boost / log / record_view.html
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<div class="refentry">
<a name="boost.log.record_view"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Class record_view</span></h2>
<p>boost::log::record_view &#8212; Logging record view class. </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="../../core_components.html#header.boost.log.core.record_view_hpp" title="Header &lt;boost/log/core/record_view.hpp&gt;">boost/log/core/record_view.hpp</a>&gt;
</span>
<span class="keyword">class</span> <a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="record_view.html#boost.log.record_viewconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="record_view.html#idp40486496-bb"><span class="identifier">record_view</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span>
<a class="link" href="record_view.html#idp40488544-bb"><span class="identifier">record_view</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="record_view.html#idp40490496-bb"><span class="identifier">record_view</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span> <a class="link" href="record_view.html#idp40493312-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span> <a class="link" href="record_view.html#idp40495840-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="record_view.html#idp40492512-bb"><span class="special">~</span><span class="identifier">record_view</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="record_view.html#idp40449120-bb">public member functions</a></span>
<span class="identifier">attribute_value_set</span> <span class="keyword">const</span> <span class="special">&amp;</span> <a class="link" href="record_view.html#idp40449680-bb"><span class="identifier">attribute_values</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="record_view.html#idp40452400-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="record_view.html#idp40457712-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="record_view.html#idp40461632-bb"><span class="keyword">operator</span> <span class="keyword">bool</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="record_view.html#idp40465824-bb"><span class="keyword">operator</span><span class="special">!</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="record_view.html#idp40469744-bb"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="record_view.html#idp40473696-bb"><span class="identifier">reset</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="identifier">attribute_value_set</span><span class="special">::</span><span class="identifier">mapped_type</span>
<a class="link" href="record_view.html#idp40476352-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">attribute_value_set</span><span class="special">::</span><span class="identifier">key_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">extract</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
<a class="link" href="record_view.html#idp40480208-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</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="idp103722016"></a><h2>Description</h2>
<p>The logging record encapsulates all information related to a single logging statement, in particular, attribute values view and the log message string. The view is immutable, it is implemented as a wrapper around a reference-counted implementation. </p>
<div class="refsect2">
<a name="idp103722960"></a><h3>
<a name="boost.log.record_viewconstruct-copy-destruct"></a><code class="computeroutput">record_view</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a name="idp40486496-bb"></a><span class="identifier">record_view</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span></pre>
<p>Default constructor. Creates an empty record view that is equivalent to the invalid record handle.</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">Postconditions:</span></p></td>
<td><p><code class="computeroutput">!*this == true</code> </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idp40488544-bb"></a><span class="identifier">record_view</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Copy constructor </p>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idp40490496-bb"></a><span class="identifier">record_view</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;&amp;</span> that<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Move constructor. Source record contents unspecified after the operation. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span> <a name="idp40493312-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Copy assignment </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span> <a name="idp40495840-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;&amp;</span> that<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Move assignment. Source record contents unspecified after the operation. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idp40492512-bb"></a><span class="special">~</span><span class="identifier">record_view</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Destructor. Destroys the record, releases any sinks and attribute values that were involved in processing this record. </p>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idp103767264"></a><h3>
<a name="idp40449120-bb"></a><code class="computeroutput">record_view</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="identifier">attribute_value_set</span> <span class="keyword">const</span> <span class="special">&amp;</span> <a name="idp40449680-bb"></a><span class="identifier">attribute_values</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<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">Requires:</span></p></td>
<td><p><code class="computeroutput">!!*this</code> </p></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A reference to the set of attribute values attached to this record</p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idp40452400-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Equality comparison</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">that</code></span></p></td>
<td><p>Comparand </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 both <code class="computeroutput">*this</code> and <span class="emphasis"><em>that</em></span> identify the same log record or both do not identify any record, <code class="computeroutput">false</code> otherwise. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idp40457712-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Inequality comparison</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">that</code></span></p></td>
<td><p>Comparand </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p><code class="computeroutput">!(*this == that)</code> </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idp40461632-bb"></a><span class="keyword">operator</span> <span class="keyword">bool</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Conversion to an unspecified boolean type</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">Returns:</span></p></td>
<td><p><code class="computeroutput">true</code>, if the <code class="computeroutput">*this</code> identifies a log record, <code class="computeroutput">false</code>, if the <code class="computeroutput">*this</code> is not valid </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idp40465824-bb"></a><span class="keyword">operator</span><span class="special">!</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Inverted conversion to an unspecified boolean type</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">Returns:</span></p></td>
<td><p><code class="computeroutput">false</code>, if the <code class="computeroutput">*this</code> identifies a log record, <code class="computeroutput">true</code>, if the <code class="computeroutput">*this</code> is not valid </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idp40469744-bb"></a><span class="identifier">swap</span><span class="special">(</span><a class="link" href="record_view.html" title="Class record_view">record_view</a> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Swaps two handles</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">that</code></span></p></td>
<td><p>Another record to swap with <span class="bold"><strong>Throws:</strong></span> Nothing </p></td>
</tr></tbody>
</table></div></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idp40473696-bb"></a><span class="identifier">reset</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Resets the log record handle. If there are no other handles left, the log record is closed and all resources referenced by the record are released.</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">Postconditions:</span></p></td>
<td><p><code class="computeroutput">!*this == true</code> </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">attribute_value_set</span><span class="special">::</span><span class="identifier">mapped_type</span>
<a name="idp40476352-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">attribute_value_set</span><span class="special">::</span><span class="identifier">key_type</span> name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Attribute value lookup.</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>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>An <code class="computeroutput">attribute_value</code>, non-empty if it is found, empty otherwise. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">extract</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
<a name="idp40480208-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> keyword<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Attribute value lookup.</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">keyword</code></span></p></td>
<td><p>Attribute keyword. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A <code class="computeroutput">value_ref</code> with extracted attribute value if it is found, empty <code class="computeroutput">value_ref</code> otherwise. </p></td>
</tr>
</tbody>
</table></div>
</li>
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<td align="right"><div class="copyright-footer">Copyright &#169; 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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