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   4 <title>Class template attribute_matches</title>
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  19 <a name="boost.log.expressions.attribute_matches"></a><div class="titlepage"></div>
  20 <div class="refnamediv">
  21 <h2><span class="refentrytitle">Class template attribute_matches</span></h2>
  22 <p>boost::log::expressions::attribute_matches</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="../../../expressions.html#header.boost.log.expressions.predicates.matches_hpp" title="Header &lt;boost/log/expressions/predicates/matches.hpp&gt;">boost/log/expressions/predicates/matches.hpp</a>&gt;
  26
  27 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> RegexT<span class="special">,</span>
  28          <span class="keyword">typename</span> FallbackPolicyT <span class="special">=</span> <span class="identifier">fallback_to_none</span><span class="special">&gt;</span>
  29 <span class="keyword">class</span> <a class="link" href="attribute_matches.html" title="Class template attribute_matches">attribute_matches</a> <span class="special">{</span>
  30 <span class="keyword">public</span><span class="special">:</span>
  31   <span class="comment">// <a class="link" href="attribute_matches.html#boost.log.expressions.attribute_matchesconstruct-copy-destruct">construct/copy/destruct</a></span>
  32   <a class="link" href="attribute_matches.html#idm45711347163792-bb"><span class="identifier">attribute_matches</span></a><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">RegexT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  33   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span>
  34     <a class="link" href="attribute_matches.html#idm45711347160528-bb"><span class="identifier">attribute_matches</span></a><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">RegexT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">U</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  35 <span class="special">}</span><span class="special">;</span></pre></div>
  36 <div class="refsect1">
  37 <a name="idm45554740295600"></a><h2>Description</h2>
  38 <p>The predicate checks if the attribute value matches a regular expression. The attribute value is assumed to be of a string type. </p>
  39 <div class="refsect2">
  40 <a name="idm45554740294784"></a><h3>
  41 <a name="boost.log.expressions.attribute_matchesconstruct-copy-destruct"></a><code class="computeroutput">attribute_matches</code>
  42         public
  43        construct/copy/destruct</h3>
  44 <div class="orderedlist"><ol class="orderedlist" type="1">
  45 <li class="listitem">
  46 <pre class="literallayout"><a name="idm45711347163792-bb"></a><span class="identifier">attribute_matches</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">,</span> <span class="identifier">RegexT</span> <span class="keyword">const</span> <span class="special">&amp;</span> rex<span class="special">)</span><span class="special">;</span></pre>
  47 <p>Initializing constructor</p>
  48 <p>
  49 </p>
  50 <div class="variablelist"><table border="0" class="variablelist compact">
  51 <colgroup>
  52 <col align="left" valign="top">
  53 <col>
  54 </colgroup>
  55 <tbody><tr>
  56 <td><p><span class="term">Parameters:</span></p></td>
  57 <td><div class="variablelist"><table border="0" class="variablelist compact">
  58 <colgroup>
  59 <col align="left" valign="top">
  60 <col>
  61 </colgroup>
  62 <tbody>
  63 <tr>
  64 <td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
  65 <td><p>Attribute name </p></td>
  66 </tr>
  67 <tr>
  68 <td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
  69 <td><p>The regular expression to match the attribute value against </p></td>
  70 </tr>
  71 </tbody>
  72 </table></div></td>
  73 </tr></tbody>
  74 </table></div>
  75 </li>
  76 <li class="listitem">
  77 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> U<span class="special">&gt;</span>
  78   <a name="idm45711347160528-bb"></a><span class="identifier">attribute_matches</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">,</span> <span class="identifier">RegexT</span> <span class="keyword">const</span> <span class="special">&amp;</span> rex<span class="special">,</span>
  79                     <span class="identifier">U</span> <span class="keyword">const</span> <span class="special">&amp;</span> arg<span class="special">)</span><span class="special">;</span></pre>
  80 <p>Initializing constructor</p>
  81 <p>
  82 </p>
  83 <div class="variablelist"><table border="0" class="variablelist compact">
  84 <colgroup>
  85 <col align="left" valign="top">
  86 <col>
  87 </colgroup>
  88 <tbody><tr>
  89 <td><p><span class="term">Parameters:</span></p></td>
  90 <td><div class="variablelist"><table border="0" class="variablelist compact">
  91 <colgroup>
  92 <col align="left" valign="top">
  93 <col>
  94 </colgroup>
  95 <tbody>
  96 <tr>
  97 <td><p><span class="term"><code class="computeroutput">arg</code></span></p></td>
  98 <td><p>Additional parameter for the fallback policy </p></td>
  99 </tr>
 100 <tr>
 101 <td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
 102 <td><p>Attribute name </p></td>
 103 </tr>
 104 <tr>
 105 <td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
 106 <td><p>The regular expression to match the attribute value against </p></td>
 107 </tr>
 108 </tbody>
 109 </table></div></td>
 110 </tr></tbody>
 111 </table></div>
 112 </li>
 113 </ol></div>
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