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

   1 <html>
   2 <head>
   3         <title>BOOST_PP_LIST_NIL</title>
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   8                 The <b>BOOST_PP_LIST_NIL</b> macro is a nil <i>list</i> constructor.
   9         </div>
  10         <h4>Usage</h4>
  11                 <div class="code">
  12                         <b>BOOST_PP_LIST_NIL</b>
  13                 </div>
  14         <h4>Remarks</h4>
  15                 <div>
  16                         This macro represents the end of a <i>list</i>.
  17                 </div>
  18                 <div>
  19                         This macro is no longer necessary.&nbsp;
  20                         It simply expands to <b>BOOST_PP_NIL</b>.&nbsp;
  21                         Because of this, this macro is deprecated.
  22                 </div>
  23         <h4>See Also</h4>
  24                 <ul>
  25                         <li><a href="nil.html">BOOST_PP_NIL</a></li>
  26                 </ul>
  27         <h4>Requirements</h4>
  28                 <div>
  29                         <b>Header:</b> &nbsp;<a href="../headers/list/adt.html">&lt;boost/preprocessor/list/adt.hpp&gt;</a>
  30                 </div>
  31         <h4>Sample Code</h4>
  32 <div><pre>
  33 #include &lt;<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>&gt;
  34
  35 #define OLD \
  36    <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
  37       a, \
  38       <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
  39          b, \
  40          <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
  41             c, \
  42             <a href="list_nil.html">BOOST_PP_LIST_NIL</a> \
  43          ) \
  44       ) \
  45    ) \
  46    /**/
  47
  48 #define NEW (a, (b, (c, <a href="nil.html">BOOST_PP_NIL</a>)))
  49
  50 <a href="list_first.html">BOOST_PP_LIST_FIRST</a>(OLD) == <a href="list_first.html">BOOST_PP_LIST_FIRST</a>(NEW)
  51    // expands to a == a
  52
  53 <a href="list_rest.html">BOOST_PP_LIST_REST</a>(OLD) == <a href="list_rest.html">BOOST_PP_LIST_RESTK</a>(NEW)
  54    // expands to (b, (c, <a href="nil.html">BOOST_PP_NIL</a>)) == (b, (c, <a href="nil.html">BOOST_PP_NIL</a>))
  55 </pre></div>
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  57         <div style="margin-left: 0px;">
  58                 <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
  59                 </br><i>© Copyright Paul Mensonides 2002</i>
  60         </div>
  61         <div style="margin-left: 0px;">
  62                 <p><small>Distributed under the Boost Software License, Version 1.0. (See
  63                 accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
  64                 copy at <a href=
  65                 "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
  66         </div>
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