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transform.html 12 KB
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  4. <title>Type Traits that Transform One Type to Another</title>
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  25. <div class="section">
    26. 

  26. <div class="titlepage"><div><div><h3 class="title">
    27. 

  27. <a name="boost_typetraits.category.transform"></a><a class="link" href="transform.html" title="Type Traits that Transform One Type to Another">Type Traits that
    28. 

  28.       Transform One Type to Another</a>
    29. 

  29. </h3></div></div></div>
    30. 

  30. <p>
    31. 

  31.         The following templates transform one type to another, based upon some well-defined
    32. 

  32.         rule. Each template has a single member called <code class="computeroutput"><span class="identifier">type</span></code>
    33. 

  33.         that is the result of applying the transformation to the template argument
    34. 

  34.         <code class="computeroutput"><span class="identifier">T</span></code>.
    35. 

  35.       </p>
    36. 

  36. <p>
    37. 

  37.         <span class="bold"><strong>Synopsis:</strong></span>
    38. 

  38.       </p>
    39. 

  39. <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>
    40. 

  40. <span class="keyword">struct</span> <a class="link" href="../reference/add_const.html" title="add_const">add_const</a><span class="special">;</span>
    41. 

  41. 

  42. <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>
    43. 

  43. <span class="keyword">struct</span> <a class="link" href="../reference/add_cv.html" title="add_cv">add_cv</a><span class="special">;</span>
    44. 

  44. 

  45. <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>
    46. 

  46. <span class="keyword">struct</span> <a class="link" href="../reference/add_lvalue_reference.html" title="add_lvalue_reference">add_lvalue_reference</a><span class="special">;</span>
    47. 

  47. 

  48. <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>
    49. 

  49. <span class="keyword">struct</span> <a class="link" href="../reference/add_pointer.html" title="add_pointer">add_pointer</a><span class="special">;</span>
    50. 

  50. 

  51. <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>
    52. 

  52. <span class="keyword">struct</span> <a class="link" href="../reference/add_reference.html" title="add_reference">add_reference</a><span class="special">;</span>
    53. 

  53. 

  54. <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>
    55. 

  55. <span class="keyword">struct</span> <a class="link" href="../reference/add_rvalue_reference.html" title="add_rvalue_reference">add_rvalue_reference</a><span class="special">;</span>
    56. 

  56. 

  57. <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>
    58. 

  58. <span class="keyword">struct</span> <a class="link" href="../reference/add_volatile.html" title="add_volatile">add_volatile</a><span class="special">;</span>
    59. 

  59. 

  60. <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">bool</span> <span class="identifier">B</span><span class="special">,</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>
    61. 

  61. <span class="keyword">struct</span> <a class="link" href="../reference/conditional.html" title="conditional">conditional</a><span class="special">;</span>
    62. 

  62. 

  63. <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span><span class="special">...</span> <span class="identifier">T</span><span class="special">&gt;</span>
    64. 

  64. <span class="keyword">struct</span> <a class="link" href="../reference/common_type.html" title="common_type">common_type</a><span class="special">;</span>
    65. 

  65. 

  66. <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>
    67. 

  67. <span class="keyword">struct</span> <a class="link" href="../reference/copy_cv.html" title="copy_cv">copy_cv</a><span class="special">;</span>
    68. 

  68. 

  69. <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>
    70. 

  70. <span class="keyword">struct</span> <a class="link" href="../reference/decay.html" title="decay">decay</a><span class="special">;</span>
    71. 

  71. 

  72. <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>
    73. 

  73. <span class="keyword">struct</span> <a class="link" href="../reference/floating_point_promotion.html" title="floating_point_promotion">floating_point_promotion</a><span class="special">;</span>
    74. 

  74. 

  75. <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>
    76. 

  76. <span class="keyword">struct</span> <a class="link" href="../reference/integral_promotion.html" title="integral_promotion">integral_promotion</a><span class="special">;</span>
    77. 

  77. 

  78. <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>
    79. 

  79. <span class="keyword">struct</span> <a class="link" href="../reference/make_signed.html" title="make_signed">make_signed</a><span class="special">;</span>
    80. 

  80. 

  81. <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>
    82. 

  82. <span class="keyword">struct</span> <a class="link" href="../reference/make_unsigned.html" title="make_unsigned">make_unsigned</a><span class="special">;</span>
    83. 

  83. 

  84. <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>
    85. 

  85. <span class="keyword">struct</span> <a class="link" href="../reference/promote.html" title="promote">promote</a><span class="special">;</span>
    86. 

  86. 

  87. <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>
    88. 

  88. <span class="keyword">struct</span> <a class="link" href="../reference/remove_all_extents.html" title="remove_all_extents">remove_all_extents</a><span class="special">;</span>
    89. 

  89. 

  90. <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>
    91. 

  91. <span class="keyword">struct</span> <a class="link" href="../reference/remove_const.html" title="remove_const">remove_const</a><span class="special">;</span>
    92. 

  92. 

  93. <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>
    94. 

  94. <span class="keyword">struct</span> <a class="link" href="../reference/remove_cv.html" title="remove_cv">remove_cv</a><span class="special">;</span>
    95. 

  95. 

  96. <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>
    97. 

  97. <span class="keyword">struct</span> <a class="link" href="../reference/remove_extent.html" title="remove_extent">remove_extent</a><span class="special">;</span>
    98. 

  98. 

  99. <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>
    100. 

  100. <span class="keyword">struct</span> <a class="link" href="../reference/remove_pointer.html" title="remove_pointer">remove_pointer</a><span class="special">;</span>
    101. 

  101. 

  102. <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>
    103. 

  103. <span class="keyword">struct</span> <a class="link" href="../reference/remove_reference.html" title="remove_reference">remove_reference</a><span class="special">;</span>
    104. 

  104. 

  105. <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>
    106. 

  106. <span class="keyword">struct</span> <a class="link" href="../reference/remove_volatile.html" title="remove_volatile">remove_volatile</a><span class="special">;</span>
    107. 

  107. 

  108. <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>
    109. 

  109. <span class="keyword">struct</span> <a class="link" href="../reference/type_identity.html" title="type_identity">type_identity</a><span class="special">;</span>
    110. 

  110. </pre>
    111. 

  111. </div>
    112. 

  112. <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
    113. 

  113. <td align="left"></td>
    114. 

  114. <td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
    115. 

  115.       Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
    116. 

  116.       Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
    117. 

  117.       Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
    118. 

  118.       Watanabe<p>
    119. 

  119.         Distributed under the Boost Software License, Version 1.0. (See accompanying
    120. 

  120.         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>)
    121. 

  121.       </p>
    122. 

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    124. 

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