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  24. </div>
  25. <div class="section">
  26. <div class="titlepage"><div><div><h3 class="title">
  27. <a name="boost_typetraits.reference.copy_cv_ref"></a><a class="link" href="copy_cv_ref.html" title="copy_cv_ref">copy_cv_ref</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">,</span> <span class="keyword">class</span> <span class="identifier">U</span><span class="special">&gt;</span>
  30. <span class="keyword">struct</span> <span class="identifier">copy_cv_ref</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. <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">U</span><span class="special">&gt;</span>
  35. <span class="keyword">using</span> <span class="identifier">copy_cv_ref_t</span> <span class="special">=</span> <span class="keyword">typename</span> <span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">U</span><span class="special">&gt;::</span><span class="identifier">type</span><span class="special">;</span>
  36. </pre>
  37. <p>
  38. <span class="bold"><strong>type:</strong></span> <code class="literal">T <span class="emphasis"><em>cvref</em></span></code>,
  39. where <span class="emphasis"><em>cvref</em></span> are the cvref-qualifiers of <code class="computeroutput"><span class="identifier">U</span></code>.
  40. </p>
  41. <p>
  42. <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
  43. <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">copy_cv_ref</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  44. 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;&gt;</span></code>
  45. </p>
  46. <div class="table">
  47. <a name="boost_typetraits.reference.copy_cv_ref.examples"></a><p class="title"><b>Table&#160;1.18.&#160;Examples</b></p>
  48. <div class="table-contents"><table class="table" summary="Examples">
  49. <colgroup>
  50. <col>
  51. <col>
  52. </colgroup>
  53. <thead><tr>
  54. <th>
  55. <p>
  56. Expression
  57. </p>
  58. </th>
  59. <th>
  60. <p>
  61. Result Type
  62. </p>
  63. </th>
  64. </tr></thead>
  65. <tbody>
  66. <tr>
  67. <td>
  68. <p>
  69. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  70. </p>
  71. </td>
  72. <td>
  73. <p>
  74. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">int</span></code>
  75. </p>
  76. </td>
  77. </tr>
  78. <tr>
  79. <td>
  80. <p>
  81. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">volatile</span> <span class="keyword">char</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  82. </p>
  83. </td>
  84. <td>
  85. <p>
  86. <code class="computeroutput"><span class="keyword">volatile</span> <span class="keyword">int</span></code>
  87. </p>
  88. </td>
  89. </tr>
  90. <tr>
  91. <td>
  92. <p>
  93. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">volatile</span>
  94. <span class="keyword">char</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  95. </p>
  96. </td>
  97. <td>
  98. <p>
  99. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">volatile</span>
  100. <span class="keyword">int</span></code>
  101. </p>
  102. </td>
  103. </tr>
  104. <tr>
  105. <td>
  106. <p>
  107. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  108. </p>
  109. </td>
  110. <td>
  111. <p>
  112. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>
  113. </p>
  114. </td>
  115. </tr>
  116. <tr>
  117. <td>
  118. <p>
  119. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  120. </p>
  121. </td>
  122. <td>
  123. <p>
  124. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&amp;</span></code>
  125. </p>
  126. </td>
  127. </tr>
  128. <tr>
  129. <td>
  130. <p>
  131. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">volatile</span> <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  132. </p>
  133. </td>
  134. <td>
  135. <p>
  136. <code class="computeroutput"><span class="keyword">volatile</span> <span class="keyword">int</span><span class="special">&amp;</span></code>
  137. </p>
  138. </td>
  139. </tr>
  140. <tr>
  141. <td>
  142. <p>
  143. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">volatile</span>
  144. <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  145. </p>
  146. </td>
  147. <td>
  148. <p>
  149. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">volatile</span>
  150. <span class="keyword">int</span><span class="special">&amp;</span></code>
  151. </p>
  152. </td>
  153. </tr>
  154. <tr>
  155. <td>
  156. <p>
  157. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
  158. </p>
  159. </td>
  160. <td>
  161. <p>
  162. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
  163. </p>
  164. </td>
  165. </tr>
  166. <tr>
  167. <td>
  168. <p>
  169. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
  170. </p>
  171. </td>
  172. <td>
  173. <p>
  174. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
  175. </p>
  176. </td>
  177. </tr>
  178. <tr>
  179. <td>
  180. <p>
  181. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">volatile</span> <span class="keyword">char</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
  182. </p>
  183. </td>
  184. <td>
  185. <p>
  186. <code class="computeroutput"><span class="keyword">volatile</span> <span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
  187. </p>
  188. </td>
  189. </tr>
  190. <tr>
  191. <td>
  192. <p>
  193. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">const</span> <span class="keyword">volatile</span>
  194. <span class="keyword">char</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
  195. </p>
  196. </td>
  197. <td>
  198. <p>
  199. <code class="computeroutput"><span class="keyword">const</span> <span class="keyword">volatile</span>
  200. <span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
  201. </p>
  202. </td>
  203. </tr>
  204. <tr>
  205. <td>
  206. <p>
  207. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&amp;&amp;,</span>
  208. <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  209. </p>
  210. </td>
  211. <td>
  212. <p>
  213. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>
  214. </p>
  215. </td>
  216. </tr>
  217. <tr>
  218. <td>
  219. <p>
  220. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&amp;,</span>
  221. <span class="keyword">const</span> <span class="keyword">char</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
  222. </p>
  223. </td>
  224. <td>
  225. <p>
  226. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>
  227. </p>
  228. </td>
  229. </tr>
  230. <tr>
  231. <td>
  232. <p>
  233. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&amp;,</span>
  234. <span class="keyword">volatile</span> <span class="keyword">char</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
  235. </p>
  236. </td>
  237. <td>
  238. <p>
  239. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>
  240. </p>
  241. </td>
  242. </tr>
  243. <tr>
  244. <td>
  245. <p>
  246. <code class="computeroutput"><span class="identifier">copy_cv_ref</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&amp;,</span>
  247. <span class="keyword">const</span> <span class="keyword">volatile</span>
  248. <span class="keyword">char</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
  249. </p>
  250. </td>
  251. <td>
  252. <p>
  253. <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>
  254. </p>
  255. </td>
  256. </tr>
  257. </tbody>
  258. </table></div>
  259. </div>
  260. <br class="table-break"><p>
  261. <span class="bold"><strong>Compiler Compatibility:</strong></span> All current compilers
  262. are supported by this trait. The type alias <code class="computeroutput"><span class="identifier">copy_cv_ref_t</span></code>
  263. is only available if the compiler supports template aliases.
  264. </p>
  265. </div>
  266. <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
  267. <td align="left"></td>
  268. <td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
  269. Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
  270. Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
  271. Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
  272. Watanabe<p>
  273. Distributed under the Boost Software License, Version 1.0. (See accompanying
  274. 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>)
  275. </p>
  276. </div></td>
  277. </tr></table>
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