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<title>Class template mutable_constant&lt;T, void, void, void&gt;</title>
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<h2><span class="refentrytitle">Class template mutable_constant&lt;T, void, void, void&gt;</span></h2>
<p>boost::log::attributes::mutable_constant&lt;T, void, void, void&gt; &#8212; Specialization for unlocked case. </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="../../../attributes.html#header.boost.log.attributes.mutable_constant_hpp" title="Header &lt;boost/log/attributes/mutable_constant.hpp&gt;">boost/log/attributes/mutable_constant.hpp</a>&gt;
</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">class</span> <a class="link" href="mutable_consta_idp42136320.html" title="Class template mutable_constant&lt;T, void, void, void&gt;">mutable_constant</a><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">void</span><span class="special">&gt;</span> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">attribute</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">T</span> <a name="boost.log.attributes.mutable_consta_idp42136320.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> <span class="comment">// The attribute value type. </span>
<span class="comment">// member classes/structs/unions</span>
<span class="comment">// Factory implementation.</span>
<span class="keyword">class</span> <a class="link" href="mutable_consta_idp42136320/impl.html" title="Class impl">impl</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">attribute</span><span class="special">::</span><span class="identifier">impl</span> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="mutable_consta_idp42136320/impl.html#boost.log.attributes.mutable_consta_idp42136320.implconstruct-copy-destruct">construct/copy/destruct</a></span>
<span class="keyword">explicit</span> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42148560-bb"><span class="identifier">impl</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42150240-bb"><span class="identifier">impl</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="mutable_consta_idp42136320/impl.html#idp42141472-bb">public member functions</a></span>
<span class="keyword">virtual</span> <a class="link" href="../attribute_value.html" title="Class attribute_value">attribute_value</a> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42142032-bb"><span class="identifier">get_value</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42144208-bb"><span class="identifier">set</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42145744-bb"><span class="identifier">set</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">value_type</span> <a class="link" href="mutable_consta_idp42136320/impl.html#idp42147280-bb"><span class="identifier">get</span></a><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>
<span class="comment">// <a class="link" href="mutable_consta_idp42136320.html#boost.log.attributes.mutable_consta_idp42136320construct-copy-destruct">construct/copy/destruct</a></span>
<span class="keyword">explicit</span> <a class="link" href="mutable_consta_idp42136320.html#idp42159296-bb"><span class="identifier">mutable_constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="mutable_consta_idp42136320.html#idp42160992-bb"><span class="identifier">mutable_constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="mutable_consta_idp42136320.html#idp42162688-bb"><span class="identifier">mutable_constant</span></a><span class="special">(</span><a class="link" href="cast_source.html" title="Class cast_source">cast_source</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="mutable_consta_idp42136320.html#idp42153072-bb">public member functions</a></span>
<span class="keyword">void</span> <a class="link" href="mutable_consta_idp42136320.html#idp42153632-bb"><span class="identifier">set</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="mutable_consta_idp42136320.html#idp42155600-bb"><span class="identifier">set</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">value_type</span> <a class="link" href="mutable_consta_idp42136320.html#idp42157568-bb"><span class="identifier">get</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="comment">// <a class="link" href="mutable_consta_idp42136320.html#idp42164656-bb">protected member functions</a></span>
impl <span class="special">*</span> <a class="link" href="mutable_consta_idp42136320.html#idp42165232-bb"><span class="identifier">get_impl</span></a><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="idp108128128"></a><h2>Description</h2>
<p>This version of attribute does not perform thread synchronization to access the stored value. </p>
<div class="refsect2">
<a name="idp108128912"></a><h3>
<a name="boost.log.attributes.mutable_consta_idp42136320construct-copy-destruct"></a><code class="computeroutput">mutable_constant</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="idp42159296-bb"></a><span class="identifier">mutable_constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span> value<span class="special">)</span><span class="special">;</span></pre>
<p>Constructor with the stored value initialization </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idp42160992-bb"></a><span class="identifier">mutable_constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span> value<span class="special">)</span><span class="special">;</span></pre>
<p>Constructor with the stored value initialization </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idp42162688-bb"></a><span class="identifier">mutable_constant</span><span class="special">(</span><a class="link" href="cast_source.html" title="Class cast_source">cast_source</a> <span class="keyword">const</span> <span class="special">&amp;</span> source<span class="special">)</span><span class="special">;</span></pre>
<p>Constructor for casting support </p>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idp108150896"></a><h3>
<a name="idp42153072-bb"></a><code class="computeroutput">mutable_constant</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idp42153632-bb"></a><span class="identifier">set</span><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&amp;</span> value<span class="special">)</span><span class="special">;</span></pre>
<p>The method sets a new attribute value. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idp42155600-bb"></a><span class="identifier">set</span><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&amp;&amp;</span> value<span class="special">)</span><span class="special">;</span></pre>
<p>The method sets a new attribute value. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">value_type</span> <a name="idp42157568-bb"></a><span class="identifier">get</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>The method acquires the current attribute value. </p>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idp108171104"></a><h3>
<a name="idp42164656-bb"></a><code class="computeroutput">mutable_constant</code> protected member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout">impl <span class="special">*</span> <a name="idp42165232-bb"></a><span class="identifier">get_impl</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</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">Returns:</span></p></td>
<td><p>Pointer to the factory implementation </p></td>
</tr></tbody>
</table></div>
</li></ol></div>
</div>
</div>
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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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