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  26 <div class="titlepage"><div><div><h3 class="title">
  27 <a name="boost_typetraits.reference.integral_promotion"></a><a class="link" href="integral_promotion.html" title="integral_promotion">integral_promotion</a>
  28 </h3></div></div></div>
  29 <pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
  30 <span class="keyword">struct</span> <span class="identifier">integral_promotion</span>
  31 <span class="special">{</span>
  32    <span class="keyword">typedef</span> <em class="replaceable"><code>see-below</code></em> <span class="identifier">type</span><span class="special">;</span>
  33 <span class="special">};</span>
  34 </pre>
  35 <p>
  36         <span class="bold"><strong>type:</strong></span> If integral promotion can be applied
  37         to an rvalue of type <code class="computeroutput"><span class="identifier">T</span></code>, then
  38         applies integral promotion to <code class="computeroutput"><span class="identifier">T</span></code>
  39         and keeps cv-qualifiers of <code class="computeroutput"><span class="identifier">T</span></code>,
  40         otherwise leaves <code class="computeroutput"><span class="identifier">T</span></code> unchanged.
  41       </p>
  42 <p>
  43         <span class="bold"><strong>C++ Standard Reference:</strong></span> 4.5 except 4.5/3
  44         (integral bit-field).
  45       </p>
  46 <p>
  47         <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
  48         <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">integral_promotion</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  49         or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  50       </p>
  51 <div class="table">
  52 <a name="boost_typetraits.reference.integral_promotion.examples"></a><p class="title"><b>Table&#160;1.21.&#160;Examples</b></p>
  53 <div class="table-contents"><table class="table" summary="Examples">
  54 <colgroup>
  55 <col>
  56 <col>
  57 </colgroup>
  58 <thead><tr>
  59 <th>
  60                 <p>
  61                   Expression
  62                 </p>
  63               </th>
  64 <th>
  65                 <p>
  66                   Result Type
  67                 </p>
  68               </th>
  69 </tr></thead>
  70 <tbody>
  71 <tr>
  72 <td>
  73                 <p>
  74                   <code class="computeroutput"><span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="keyword">short</span>
  75                   <span class="keyword">const</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  76                 </p>
  77               </td>
  78 <td>
  79                 <p>
  80                   <code class="computeroutput"><span class="keyword">int</span> <span class="keyword">const</span></code>
  81                 </p>
  82               </td>
  83 </tr>
  84 <tr>
  85 <td>
  86                 <p>
  87                   <code class="computeroutput"><span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="keyword">short</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  88                 </p>
  89               </td>
  90 <td>
  91                 <p>
  92                   <code class="computeroutput"><span class="keyword">short</span><span class="special">&amp;</span></code>
  93                 </p>
  94               </td>
  95 </tr>
  96 <tr>
  97 <td>
  98                 <p>
  99                   <code class="computeroutput"><span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="keyword">enum</span>
 100                   <span class="identifier">std</span><span class="special">::</span><span class="identifier">float_round_style</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
 101                 </p>
 102               </td>
 103 <td>
 104                 <p>
 105                   <code class="computeroutput"><span class="keyword">int</span></code>
 106                 </p>
 107               </td>
 108 </tr>
 109 </tbody>
 110 </table></div>
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