ceph/src/boost/libs/preprocessor/doc/ref/list_size_d.html

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   2 <head>
   3         <title>BOOST_PP_LIST_SIZE_D</title>
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   8                 The <b>BOOST_PP_LIST_SIZE_D</b> macro expands to the size of a <i>list</i>.&nbsp;
   9                 It reenters <b>BOOST_PP_WHILE</b> with maximum efficiency.
  10         </div>
  11         <h4>Usage</h4>
  12                 <div class="code">
  13                         <b>BOOST_PP_LIST_SIZE_D</b>(<i>d</i>, <i>list</i>)
  14                 </div>
  15         <h4>Arguments</h4>
  16                 <dl>
  17                         <dt>d</dt>
  18                         <dd>
  19                                 The next available <b>BOOST_PP_WHILE</b> iteration.
  20                         </dd>
  21                         <dt>list</dt>
  22                         <dd>
  23                                 A <i>list</i> whose size is to be calculated.
  24                         </dd>
  25                 </dl>
  26         <h4>See Also</h4>
  27                 <ul>
  28                         <li><a href="list_size.html">BOOST_PP_LIST_SIZE</a></li>
  29                 </ul>
  30         <h4>Requirements</h4>
  31                 <div>
  32                         <b>Header:</b> &nbsp;<a href="../headers/list/size.html">&lt;boost/preprocessor/list/size.hpp&gt;</a>
  33                 </div>
  34         <h4>Sample Code</h4>
  35 <div><pre>
  36 #include &lt;<a href="../headers/arithmetic/add.html">boost/preprocessor/arithmetic/add.hpp</a>&gt;
  37 #include &lt;<a href="../headers/list/fold_left.html">boost/preprocessor/list/fold_left.hpp</a>&gt;
  38 #include &lt;<a href="../headers/list/size.html">boost/preprocessor/list/size.hpp</a>&gt;
  39
  40 #define L1 (a, (b, (c, <a href="nil.html">BOOST_PP_NIL</a>)))
  41 #define L2 (x, (y, <a href="nil.html">BOOST_PP_NIL</a>))
  42 #define L3 (p, (q, <a href="nil.html">BOOST_PP_NIL</a>))
  43
  44 #define LIST (L1, (L2, (L3, <a href="nil.html">BOOST_PP_NIL</a>)))
  45
  46 #define OP(d, state, x) \
  47    <a href="add_d.html">BOOST_PP_ADD_D</a>( \
  48       d, state, \
  49       <a href="list_size_d.html">BOOST_PP_LIST_SIZE_D</a>(d, x) \
  50    ) \
  51    /**/
  52
  53 <a href="list_fold_left.html">BOOST_PP_LIST_FOLD_LEFT</a>(OP, 0, LIST) // expands to 7
  54 </pre></div>
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  57                 <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
  58                 </br><i>© Copyright Paul Mensonides 2002</i>
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  60         <div style="margin-left: 0px;">
  61                 <p><small>Distributed under the Boost Software License, Version 1.0. (See
  62                 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
  63                 copy at <a href=
  64                 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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