libs/log/doc/html/boost/log/attribute/impl.html

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   4 <title>Struct impl</title>
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  18 <div class="refentry">
  19 <a name="boost.log.attribute.impl"></a><div class="titlepage"></div>
  20 <div class="refnamediv">
  21 <h2><span class="refentrytitle">Struct impl</span></h2>
  22 <p>boost::log::attribute::impl &#8212; A base class for an attribute value factory. </p>
  23 </div>
  24 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  25 <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.attribute_hpp" title="Header &lt;boost/log/attributes/attribute.hpp&gt;">boost/log/attributes/attribute.hpp</a>&gt;
  26
  27 </span>
  28
  29 <span class="comment">// A base class for an attribute value factory.</span>
  30
  31 <span class="keyword">struct</span> <a class="link" href="impl.html" title="Struct impl">impl</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive_ref_counter</span><span class="special">&lt;</span> <span class="identifier">impl</span> <span class="special">&gt;</span> <span class="special">{</span>
  32   <span class="comment">// <a class="link" href="impl.html#boost.log.attribute.implconstruct-copy-destruct">construct/copy/destruct</a></span>
  33   <a class="link" href="impl.html#idm45711350548064-bb"><span class="special">~</span><span class="identifier">impl</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  34
  35   <span class="comment">// <a class="link" href="impl.html#idm45711350551664-bb">public member functions</a></span>
  36   <span class="keyword">virtual</span> <a class="link" href="../attribute_value.html" title="Class attribute_value">attribute_value</a> <a class="link" href="impl.html#idm45711350551104-bb"><span class="identifier">get_value</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
  37
  38   <span class="comment">// <a class="link" href="impl.html#idm45711350547488-bb">public static functions</a></span>
  39   <span class="keyword">static</span> <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="impl.html#idm45711350546928-bb"><span class="keyword">operator</span> <span class="keyword">new</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  40   <span class="keyword">static</span> <span class="keyword">void</span> <a class="link" href="impl.html#idm45711350545120-bb"><span class="keyword">operator</span> <span class="keyword">delete</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
  41 <span class="special">}</span><span class="special">;</span></pre></div>
  42 <div class="refsect1">
  43 <a name="idm45554755088768"></a><h2>Description</h2>
  44 <p>All attributes must derive their implementation from this class. </p>
  45 <div class="refsect2">
  46 <a name="idm45554755088016"></a><h3>
  47 <a name="boost.log.attribute.implconstruct-copy-destruct"></a><code class="computeroutput">impl</code>
  48         public
  49        construct/copy/destruct</h3>
  50 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  51 <pre class="literallayout"><a name="idm45711350548064-bb"></a><span class="special">~</span><span class="identifier">impl</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Virtual destructor. </li></ol></div>
  52 </div>
  53 <div class="refsect2">
  54 <a name="idm45554755081456"></a><h3>
  55 <a name="idm45711350551664-bb"></a><code class="computeroutput">impl</code> public member functions</h3>
  56 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  57 <pre class="literallayout"><span class="keyword">virtual</span> <a class="link" href="../attribute_value.html" title="Class attribute_value">attribute_value</a> <a name="idm45711350551104-bb"></a><span class="identifier">get_value</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span></pre>
  58 <p>
  59 </p>
  60 <div class="variablelist"><table border="0" class="variablelist compact">
  61 <colgroup>
  62 <col align="left" valign="top">
  63 <col>
  64 </colgroup>
  65 <tbody><tr>
  66 <td><p><span class="term">Returns:</span></p></td>
  67 <td><p>The actual attribute value. It shall not return empty values (exceptions shall be used to indicate errors). </p></td>
  68 </tr></tbody>
  69 </table></div>
  70 </li></ol></div>
  71 </div>
  72 <div class="refsect2">
  73 <a name="idm45554755070960"></a><h3>
  74 <a name="idm45711350547488-bb"></a><code class="computeroutput">impl</code> public static functions</h3>
  75 <div class="orderedlist"><ol class="orderedlist" type="1">
  76 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">void</span> <span class="special">*</span> <a name="idm45711350546928-bb"></a><span class="keyword">operator</span> <span class="keyword">new</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> size<span class="special">)</span><span class="special">;</span></pre></li>
  77 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">void</span> <a name="idm45711350545120-bb"></a><span class="keyword">operator</span> <span class="keyword">delete</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> p<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> size<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
  78 </ol></div>
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  84 <td align="right"><div class="copyright-footer">Copyright &#169; 2007-2016 Andrey Semashev<p>
  85         Distributed under the Boost Software License, Version 1.0. (See accompanying
  86         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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