libs/gil/doc/html/reference/promote__integral_8hpp_source.html

   1 <!-- HTML header for doxygen 1.8.13-->
   2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
   6     <meta http-equiv="X-UA-Compatible" content="IE=9"/>
   7     <meta name="generator" content="Doxygen 1.8.15"/>
   8     <meta name="viewport" content="width=device-width, initial-scale=1"/>
   9     <title>Generic Image Library: promote_integral.hpp Source File</title>
  10     <link href="tabs.css" rel="stylesheet" type="text/css"/>
  11     <script type="text/javascript" src="jquery.js"></script>
  12     <script type="text/javascript" src="dynsections.js"></script>
  13     <link href="doxygen.css" rel="stylesheet" type="text/css" />
  14     <link href="doxygen-boost.css" rel="stylesheet" type="text/css"/>
  15   </head>
  16   <body>
  17     <div class="boost-header">
  18       <table border="0" cellpadding="7" cellspacing="0" width="100%" summary="header">
  19         <tr>
  20           <td valign="top" width="300">
  21             <h3><a href="../index.html"><img alt="Boost GIL" src="../_static/gil.png" border="0"></a></h3>
  22           </td>
  23           <td ><h1 align="center"><a href="../index.html"></a></h1></td>
  24           <td></td>
  25         </tr>
  26       </table>
  27     </div>
  28     <hr/>
  29     <div id="top"><!-- do not remove this div, it is closed by doxygen! -->
  30 <!-- Generated by Doxygen 1.8.15 -->
  31 <script type="text/javascript" src="menudata.js"></script>
  32 <script type="text/javascript" src="menu.js"></script>
  33 <script type="text/javascript">
  34 /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
  35 $(function() {
  36   initMenu('',false,false,'search.php','Search');
  37 });
  38 /* @license-end */</script>
  39 <div id="main-nav"></div>
  40 <div id="nav-path" class="navpath">
  41   <ul>
  42 <li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_1878a3f4746a95c6aad317458cc7ef80.html">boost</a></li><li class="navelem"><a class="el" href="dir_df4750f408086f9b9c1b5ee4251365ff.html">gil</a></li>  </ul>
  43 </div>
  44 </div><!-- top -->
  45 <div class="header">
  46   <div class="headertitle">
  47 <div class="title">promote_integral.hpp</div>  </div>
  48 </div><!--header-->
  49 <div class="contents">
  50 <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Boost.GIL (Generic Image Library)</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// Copyright (c) 2015, Oracle and/or its affiliates.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// Licensed under the Boost Software License version 1.0.</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// http://www.boost.org/users/license.html</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// Source: Boost.Geometry (aka GGL, Generic Geometry Library)</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// Modifications: adapted for Boost.GIL</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">//  - Rename namespace boost::geometry to boost::gil</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">//  - Rename include guards</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">//  - Remove support for boost::multiprecision types</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">//  - Remove support for 128-bit integer types</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#ifndef BOOST_GIL_PROMOTE_INTEGRAL_HPP</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#define BOOST_GIL_PROMOTE_INTEGRAL_HPP</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;boost/mpl/begin.hpp&gt;</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;boost/mpl/deref.hpp&gt;</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &lt;boost/mpl/end.hpp&gt;</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;boost/mpl/list.hpp&gt;</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;boost/mpl/next.hpp&gt;</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &lt;climits&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &lt;cstddef&gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &lt;type_traits&gt;</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;{</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">namespace </span>detail { <span class="keyword">namespace </span>promote_integral</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;{</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">// meta-function that returns the bit size of a type</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;&lt;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">typename</span> T,</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="keywordtype">bool</span> IsFundamental = std::is_fundamental&lt;T&gt;::value</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;&gt;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">struct </span>bit_size {};</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">// for fundamental types, just return CHAR_BIT * sizeof(T)</span></div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="keyword">struct </span>bit_size&lt;T, true&gt; : std::integral_constant&lt;std::size_t, (CHAR_BIT * sizeof(T))&gt; {};</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;&lt;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    <span class="keyword">typename</span> T,</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keyword">typename</span> Iterator,</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">typename</span> EndIterator,</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    std::size_t MinSize</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;&gt;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">struct </span>promote_to_larger</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;{</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keyword">using</span> current_type = <span class="keyword">typename</span> boost::mpl::deref&lt;Iterator&gt;::type;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> std::conditional</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        &lt;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;            (bit_size&lt;current_type&gt;::value &gt;= MinSize),</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;            current_type,</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;            <span class="keyword">typename</span> promote_to_larger</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                &lt;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                    T,</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                    <span class="keyword">typename</span> boost::mpl::next&lt;Iterator&gt;::type,</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                    EndIterator,</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                    MinSize</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                &gt;::type</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        &gt;::type;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;};</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment">// The following specialization is required to finish the loop over</span></div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment">// all list elements</span></div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> EndIterator, std::<span class="keywordtype">size_t</span> MinSize&gt;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="keyword">struct </span>promote_to_larger&lt;T, EndIterator, EndIterator, MinSize&gt;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;{</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <span class="comment">// if promotion fails, keep the number T</span></div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="comment">// (and cross fingers that overflow will not occur)</span></div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    <span class="keyword">using</span> type = T;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;};</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;}} <span class="comment">// namespace detail::promote_integral</span></div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;&lt;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keyword">typename</span> T,</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keywordtype">bool</span> PromoteUnsignedToUnsigned = <span class="keyword">false</span>,</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keywordtype">bool</span> UseCheckedInteger = <span class="keyword">false</span>,</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keywordtype">bool</span> IsIntegral = std::is_integral&lt;T&gt;::value</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;&gt;</div><div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1promote__integral.html">  123</a></span>&#160;<span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1promote__integral.html">promote_integral</a></div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;{</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> is_unsigned = std::is_unsigned&lt;T&gt;::value;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    <span class="keyword">using</span> bit_size_type = detail::promote_integral::bit_size&lt;T&gt;;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="comment">// Define the minimum size (in bits) needed for the promoted type</span></div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    <span class="comment">// If T is the input type and P the promoted type, then the</span></div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="comment">// minimum number of bits for P are (below b stands for the number</span></div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="comment">// of bits of T):</span></div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    <span class="comment">// * if T is unsigned and P is unsigned: 2 * b</span></div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="comment">// * if T is signed and P is signed: 2 * b - 1</span></div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    <span class="comment">// * if T is unsigned and P is signed: 2 * b + 1</span></div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    <span class="keyword">using</span> min_bit_size_type = <span class="keyword">typename</span> std::conditional</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        &lt;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            (PromoteUnsignedToUnsigned &amp;&amp; is_unsigned),</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;            std::integral_constant&lt;std::size_t, (2 * bit_size_type::value)&gt;,</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;            <span class="keyword">typename</span> std::conditional</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;                &lt;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;                    is_unsigned,</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;                    std::integral_constant&lt;std::size_t, (2 * bit_size_type::value + 1)&gt;,</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;                    std::integral_constant&lt;std::size_t, (2 * bit_size_type::value - 1)&gt;</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;                &gt;::type</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        &gt;::type;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <span class="comment">// Define the list of signed integral types we are going to use</span></div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="comment">// for promotion</span></div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <span class="keyword">using</span> signed_integral_types = boost::mpl::list</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;        &lt;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;            short, int, <span class="keywordtype">long</span></div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="preprocessor">#if defined(BOOST_HAS_LONG_LONG)</span></div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;            , boost::long_long_type</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;        &gt;;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    <span class="comment">// Define the list of unsigned integral types we are going to use</span></div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    <span class="comment">// for promotion</span></div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    <span class="keyword">using</span> unsigned_integral_types = boost::mpl::list</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        &lt;</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            <span class="keywordtype">unsigned</span> short, <span class="keywordtype">unsigned</span> int, <span class="keywordtype">unsigned</span> long, std::size_t</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="preprocessor">#if defined(BOOST_HAS_LONG_LONG)</span></div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;            , boost::ulong_long_type</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        &gt;;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="comment">// Define the list of integral types that will be used for</span></div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="comment">// promotion (depending in whether we was to promote unsigned to</span></div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="comment">// unsigned or not)</span></div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <span class="keyword">using</span> integral_types = <span class="keyword">typename</span> std::conditional</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;        &lt;</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;            (is_unsigned &amp;&amp; PromoteUnsignedToUnsigned),</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;            unsigned_integral_types,</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            signed_integral_types</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        &gt;::type;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> detail::promote_integral::promote_to_larger</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;        &lt;</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;            T,</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;            <span class="keyword">typename</span> boost::mpl::begin&lt;integral_types&gt;::type,</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;            <span class="keyword">typename</span> boost::mpl::end&lt;integral_types&gt;::type,</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;            min_bit_size_type::value</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;        &gt;::type;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;};</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keywordtype">bool</span> PromoteUn<span class="keywordtype">signed</span>ToUn<span class="keywordtype">signed</span>, <span class="keywordtype">bool</span> UseCheckedInteger&gt;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1promote__integral.html">promote_integral</a></div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    &lt;</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;        T, PromoteUnsignedToUnsigned, UseCheckedInteger, false</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    &gt;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;{</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    <span class="keyword">using</span> type = T;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;};</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;}} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;<span class="preprocessor">#endif // BOOST_GIL_PROMOTE_INTEGRAL_HPP</span></div><div class="ttc" id="classboost_1_1gil_1_1promote__integral_html"><div class="ttname"><a href="classboost_1_1gil_1_1promote__integral.html">boost::gil::promote_integral</a></div><div class="ttdoc">Meta-function to define an integral type with size than is (roughly) twice the bit size of T.</div><div class="ttdef"><b>Definition:</b> promote_integral.hpp:123</div></div>
  51 </div><!-- fragment --></div><!-- contents -->
  52      <!-- HTML footer for doxygen 1.8.13-->
  53      <!-- start footer part -->
  54      <hr class="footer"/>
  55      <address class="footer">
  56       <small>
  57         Generated by &#160;<a href="http://www.doxygen.org/index.html">doxygen</a> 1.8.15
  58       </small>
  59     </address>
  60   </body>
  61 </html>