ceph/src/boost/libs/type_traits/doc/html/boost_typetraits/reference/make_unsigned.html

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  26 <div class="titlepage"><div><div><h3 class="title">
  27 <a name="boost_typetraits.reference.make_unsigned"></a><a class="link" href="make_unsigned.html" title="make_unsigned">make_unsigned</a>
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  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">make_unsigned</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 T is a unsigned integer type then
  37         the same type as T, if T is an signed integer type then the corresponding
  38         unsigned type. Otherwise if T is an enumerated or character type (char or
  39         wchar_t) then an unsigned integer type with the same width as T.
  40       </p>
  41 <p>
  42         If T has any cv-qualifiers then these are also present on the result type.
  43       </p>
  44 <p>
  45         <span class="bold"><strong>Requires:</strong></span> T must be an integer or enumerated
  46         type, and must not be the type bool.
  47       </p>
  48 <p>
  49         <span class="bold"><strong>C++ Standard Reference:</strong></span> 3.9.1.
  50       </p>
  51 <p>
  52         <span class="bold"><strong>Compiler Compatibility:</strong></span> All current compilers
  53         are supported by this trait.
  54       </p>
  55 <p>
  56         <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
  57         <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">make_unsigned</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  58         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>
  59       </p>
  60 <div class="table">
  61 <a name="boost_typetraits.reference.make_unsigned.examples"></a><p class="title"><b>Table&#160;1.24.&#160;Examples</b></p>
  62 <div class="table-contents"><table class="table" summary="Examples">
  63 <colgroup>
  64 <col>
  65 <col>
  66 </colgroup>
  67 <thead><tr>
  68 <th>
  69                 <p>
  70                   Expression
  71                 </p>
  72               </th>
  73 <th>
  74                 <p>
  75                   Result Type
  76                 </p>
  77               </th>
  78 </tr></thead>
  79 <tbody>
  80 <tr>
  81 <td>
  82                 <p>
  83                   <code class="computeroutput"><span class="identifier">make_unsigned</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  84                 </p>
  85               </td>
  86 <td>
  87                 <p>
  88                   <code class="computeroutput"><span class="keyword">unsigned</span> <span class="keyword">int</span></code>
  89                 </p>
  90               </td>
  91 </tr>
  92 <tr>
  93 <td>
  94                 <p>
  95                   <code class="computeroutput"><span class="identifier">make_unsigned</span><span class="special">&lt;</span><span class="keyword">unsigned</span> <span class="keyword">int</span>
  96                   <span class="keyword">const</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  97                 </p>
  98               </td>
  99 <td>
 100                 <p>
 101                   <code class="computeroutput"><span class="keyword">unsigned</span> <span class="keyword">int</span>
 102                   <span class="keyword">const</span></code>
 103                 </p>
 104               </td>
 105 </tr>
 106 <tr>
 107 <td>
 108                 <p>
 109                   <code class="computeroutput"><span class="identifier">make_unsigned</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">unsigned</span>
 110                   <span class="keyword">long</span> <span class="keyword">long</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
 111                 </p>
 112               </td>
 113 <td>
 114                 <p>
 115                   <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">unsigned</span>
 116                   <span class="keyword">long</span> <span class="keyword">long</span></code>
 117                 </p>
 118               </td>
 119 </tr>
 120 <tr>
 121 <td>
 122                 <p>
 123                   <code class="computeroutput"><span class="identifier">make_unsigned</span><span class="special">&lt;</span><span class="identifier">my_enum</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
 124                 </p>
 125               </td>
 126 <td>
 127                 <p>
 128                   An unsigned integer type with the same width as the enum.
 129                 </p>
 130               </td>
 131 </tr>
 132 <tr>
 133 <td>
 134                 <p>
 135                   <code class="computeroutput"><span class="identifier">make_unsigned</span><span class="special">&lt;</span><span class="keyword">wchar_t</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
 136                 </p>
 137               </td>
 138 <td>
 139                 <p>
 140                   An unsigned integer type with the same width as wchar_t.
 141                 </p>
 142               </td>
 143 </tr>
 144 </tbody>
 145 </table></div>
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 151 <td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
 152       Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
 153       Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
 154       Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
 155       Watanabe<p>
 156         Distributed under the Boost Software License, Version 1.0. (See accompanying
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