<span class="keyword">class</span> <a class="link" href="constant/impl.html" title="Class impl">impl</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">attribute_value_impl</span><span class="special"><</span> <span class="identifier">value_type</span> <span class="special">></span> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="constant/impl.html#boost.log.attributes.constant.implconstruct-copy-destruct">construct/copy/destruct</a></span>
- <span class="keyword">explicit</span> <a class="link" href="constant/impl.html#idm45185967251488-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">&</span><span class="special">)</span><span class="special">;</span>
- <span class="keyword">explicit</span> <a class="link" href="constant/impl.html#idm45185967249792-bb"><span class="identifier">impl</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</span><span class="special">)</span><span class="special">;</span>
+ <span class="keyword">explicit</span> <a class="link" href="constant/impl.html#idm45711348852208-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">&</span><span class="special">)</span><span class="special">;</span>
+ <span class="keyword">explicit</span> <a class="link" href="constant/impl.html#idm45711348850512-bb"><span class="identifier">impl</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span>
<span class="comment">// <a class="link" href="constant.html#boost.log.attributes.constantconstruct-copy-destruct">construct/copy/destruct</a></span>
- <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45185967244112-bb"><span class="identifier">constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
- <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45185967242416-bb"><span class="identifier">constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</span><span class="special">)</span><span class="special">;</span>
- <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45185967240720-bb"><span class="identifier">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">&</span><span class="special">)</span><span class="special">;</span>
+ <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45711348844832-bb"><span class="identifier">constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
+ <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45711348843136-bb"><span class="identifier">constant</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</span><span class="special">)</span><span class="special">;</span>
+ <span class="keyword">explicit</span> <a class="link" href="constant.html#idm45711348841440-bb"><span class="identifier">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">&</span><span class="special">)</span><span class="special">;</span>
- <span class="comment">// <a class="link" href="constant.html#idm45185967246960-bb">public member functions</a></span>
- <span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a class="link" href="constant.html#idm45185967246400-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="constant.html#idm45711348847680-bb">public member functions</a></span>
+ <span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a class="link" href="constant.html#idm45711348847120-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></pre></div>
<div class="refsect1">
-<a name="idm46436921253904"></a><h2>Description</h2>
+<a name="idm45554752746800"></a><h2>Description</h2>
<p>The constant is a simplest and one of the most frequently used types of attributes. It stores a constant value, which it eventually returns as its value each time requested. </p>
<div class="refsect2">
-<a name="idm46436921253040"></a><h3>
+<a name="idm45554752745936"></a><h3>
<a name="boost.log.attributes.constantconstruct-copy-destruct"></a><code class="computeroutput">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="idm45185967244112-bb"></a><span class="identifier">constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> value<span class="special">)</span><span class="special">;</span></pre>
+<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45711348844832-bb"></a><span class="identifier">constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</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="idm45185967242416-bb"></a><span class="identifier">constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</span> value<span class="special">)</span><span class="special">;</span></pre>
+<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45711348843136-bb"></a><span class="identifier">constant</span><span class="special">(</span><span class="identifier">value_type</span> <span class="special">&&</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="idm45185967240720-bb"></a><span class="identifier">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">&</span> source<span class="special">)</span><span class="special">;</span></pre>
+<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45711348841440-bb"></a><span class="identifier">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">&</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="idm46436921231088"></a><h3>
-<a name="idm45185967246960-bb"></a><code class="computeroutput">constant</code> public member functions</h3>
+<a name="idm45554752724048"></a><h3>
+<a name="idm45711348847680-bb"></a><code class="computeroutput">constant</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
-<pre class="literallayout"><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a name="idm45185967246400-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>
+<pre class="literallayout"><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a name="idm45711348847120-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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">