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<html> <head> <title>BOOST_PP_LIST_IS_NIL</title> <link rel="stylesheet" type="text/css" href="../styles.css"> </head> <body> <div style="margin-left: 0px;"> The <b>BOOST_PP_LIST_IS_NIL</b> macro is a predicate that determines if a <i>list</i> is nil. </div> <h4>Usage</h4> <div class="code"> <b>BOOST_PP_LIST_IS_NIL</b>(<i>list</i>) </div> <h4>Arguments</h4> <dl> <dt>list</dt> <dd> A <i>list</i>. </dd> </dl> <h4>Remarks</h4> <div> If <i>list</i> is nil, this macro expands to <i>1</i>. Otherwise, it expands to <i>0</i>. </div> <h4>Requirements</h4> <div> <b>Header:</b> <a href="../headers/list/adt.html"><boost/preprocessor/list/adt.hpp></a> </div> <h4>Sample Code</h4> <div><pre> #include <<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>> #define LIST (a, <a href="nil.html">BOOST_PP_NIL</a>) <a href="list_is_nil.html">BOOST_PP_LIST_IS_NIL</a>(LIST) // expands to 0 <a href="list_is_nil.html">BOOST_PP_LIST_IS_NIL</a>(<a href="list_rest.html">BOOST_PP_LIST_REST</a>(LIST)) // expands to 1 </pre></div> <hr size="1"> <div style="margin-left: 0px;"> <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> </br><i>© Copyright Paul Mensonides 2002</i> </div> <div style="margin-left: 0px;"> <p><small>Distributed under the Boost Software License, Version 1.0. (See accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy at <a href= "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> </div> </body> </html>
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