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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_typetraits.reference.integral_promotion"></a><a class="link" href="integral_promotion.html" title="integral_promotion">integral_promotion</a>
</h3></div></div></div>
<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>
<span class="keyword">struct</span> <span class="identifier">integral_promotion</span>
<span class="special">{</span>
   <span class="keyword">typedef</span> <em class="replaceable"><code>see-below</code></em> <span class="identifier">type</span><span class="special">;</span>
<span class="special">};</span>

<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> <span class="keyword">using</span> <span class="identifier">integral_promotion_t</span> <span class="special">=</span> <span class="keyword">typename</span> <span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span><span class="special">;</span> <span class="comment">// C++11 and above</span>
</pre>
<p>
        <span class="bold"><strong>type:</strong></span> If integral promotion can be applied
        to an rvalue of type <code class="computeroutput"><span class="identifier">T</span></code>, then
        applies integral promotion to <code class="computeroutput"><span class="identifier">T</span></code>
        and keeps cv-qualifiers of <code class="computeroutput"><span class="identifier">T</span></code>,
        otherwise leaves <code class="computeroutput"><span class="identifier">T</span></code> unchanged.
      </p>
<p>
        <span class="bold"><strong>C++ Standard Reference:</strong></span> 4.5 except 4.5/3
        (integral bit-field).
      </p>
<p>
        <span class="bold"><strong>Header:</strong></span> <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">integral_promotion</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
        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>
      </p>
<div class="table">
<a name="boost_typetraits.reference.integral_promotion.examples"></a><p class="title"><b>Table&#160;1.24.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Expression
                </p>
              </th>
<th>
                <p>
                  Result Type
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="keyword">short</span>
                  <span class="keyword">const</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">int</span> <span class="keyword">const</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <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>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">short</span><span class="special">&amp;</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">integral_promotion</span><span class="special">&lt;</span><span class="keyword">enum</span>
                  <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>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="keyword">int</span></code>
                </p>
              </td>
</tr>
</tbody>
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