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+<html>
+<head>
+ <title>BOOST_PP_LIST_CONS</title>
+ <link rel="stylesheet" type="text/css" href="../styles.css">
+</head>
+<body>
+ <div style="margin-left: 0px;">
+ The <b>BOOST_PP_LIST_CONS</b> macro is a <i>list</i> constructor.
+ </div>
+ <h4>Usage</h4>
+ <div class="code">
+ <b>BOOST_PP_LIST_CONS</b>(<i>head</i>, <i>tail</i>)
+ </div>
+ <h4>Arguments</h4>
+ <dl>
+ <dt>head</dt>
+ <dd>
+ An element in a <i>list</i>.
+ </dd>
+ <dt>tail</dt>
+ <dd>
+ Either a <i>list</i>, <b>BOOST_PP_LIST_NIL</b>, or <b>BOOST_PP_NIL</b>.
+ </dd>
+ </dl>
+ <h4>Remarks</h4>
+ <div>
+ This macro appends a new head to an existing <i>list</i> or creates a <i>list</i> from <b>BOOST_PP_LIST_NIL</b>.
+ </div>
+ <div>
+ This macro is no longer necessary.
+ For example...
+ <div>
+ <b>BOOST_PP_LIST_CONS</b>(a, <b>BOOST_PP_LIST_CONS</b>(b, <b>BOOST_PP_LIST_NIL</b>)))
+ </div>
+ ...is just an explicit way of writing the following:
+ <div>
+ (a, (b, <b>BOOST_PP_NIL</b>))
+ </div>
+ Because of this, this macro is deprecated.
+ </div>
+ <h4>See Also</h4>
+ <ul>
+ <li><a href="list_nil.html">BOOST_PP_LIST_NIL</a></li>
+ <li><a href="nil.html">BOOST_PP_NIL</a></li>
+ </ul>
+ <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 OLD \
+ <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
+ a, \
+ <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
+ b, \
+ <a href="list_cons.html">BOOST_PP_LIST_CONS</a>( \
+ c, \
+ <a href="list_nil.html">BOOST_PP_LIST_NIL</a> \
+ ) \
+ ) \
+ ) \
+ /**/
+
+#define NEW (a, (b, (c, <a href="nil.html">BOOST_PP_NIL</a>)))
+
+<a href="list_first.html">BOOST_PP_LIST_FIRST</a>(OLD) == <a href="list_first.html">BOOST_PP_LIST_FIRST</a>(NEW)
+ // expands to a == a
+
+<a href="list_rest.html">BOOST_PP_LIST_REST</a>(OLD) == <a href="list_rest.html">BOOST_PP_LIST_REST</a>(NEW)
+ // expands to (b, (c, <a href="nil.html">BOOST_PP_NIL</a>)) == (b, (c, <a href="nil.html">BOOST_PP_NIL</a>))
+</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>