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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_typetraits.reference.make_signed"></a><a class="link" href="make_signed.html" title="make_signed"> make_signed</a> |
| </h3></div></div></div> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">make_signed</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> |
| </pre> |
| <p> |
| <span class="bold"><strong>type:</strong></span> If T is a signed integer type then |
| the same type as T, if T is an unsigned integer type then the corresponding |
| signed type. Otherwise if T is an enumerated or character type (char or wchar_t) |
| then a signed integer type with the same width as T. |
| </p> |
| <p> |
| If T has any cv-qualifiers then these are also present on the result type. |
| </p> |
| <p> |
| <span class="bold"><strong>Requires:</strong></span> T must be an integer or enumerated |
| type, and must not be the type bool. |
| </p> |
| <p> |
| <span class="bold"><strong>C++ Standard Reference:</strong></span> 3.9.1. |
| </p> |
| <p> |
| <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span> |
| <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">make_signed</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special"><</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">></span></code> |
| </p> |
| <div class="table"> |
| <a name="id1089750"></a><p class="title"><b>Table 1.17. 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">make_signed</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="keyword">int</span></code> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">make_signed</span><span class="special"><</span><span class="keyword">unsigned</span> <span class="keyword">int</span> |
| <span class="keyword">const</span><span class="special">>::</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">make_signed</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">unsigned</span> |
| <span class="keyword">long</span> <span class="keyword">long</span><span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">long</span> |
| <span class="keyword">long</span></code> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">make_signed</span><span class="special"><</span><span class="identifier">my_enum</span><span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| A signed integer type with the same width as the enum. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">make_signed</span><span class="special"><</span><span class="keyword">wchar_t</span><span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| A signed integer type with the same width as wchar_t. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <br class="table-break"> |
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| <td align="right"><div class="copyright-footer">Copyright © 2000, 2006 Adobe Systems Inc, David Abrahams, |
| Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat |
| Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert |
| Ramey and Jeremy Siek<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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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