forked from boostorg/preprocessor
59 lines
1.7 KiB
HTML
59 lines
1.7 KiB
HTML
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<html>
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<head>
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<title>BOOST_PP_LIST_NIL</title>
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<link rel="stylesheet" type="text/css" href="../styles.css">
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<script language="javascript" type="text/javascript" src="../scripts.js"></script>
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</head>
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<body onload="init('sample');">
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<div style="margin-left: 0px;">
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The <b>BOOST_PP_LIST_NIL</b> macro is a nil <i>list</i> constructor.
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</div>
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<h4>Usage</h4>
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<div class="code">
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<b>BOOST_PP_LIST_NIL</b>
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</div>
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<h4>Remarks</h4>
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<div>
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This macro represents the end of a <i>list</i>.
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</div>
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<div>
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This macro is no longer necessary.
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It simply expands to <b>BOOST_PP_NIL</b>.
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Because of this, this macro is deprecated.
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</div>
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<h4>See Also</h4>
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<ul>
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<li><a href="nil.html">BOOST_PP_NIL</a></li>
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</ul>
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<h4>Requirements</h4>
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<div>
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<b>Header:</b> <a href="../headers/list/adt.hpp.html"><boost/preprocessor/list/adt.hpp></a>
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</div>
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<h4><a class="local" onclick="toggle('sample');" onmouseover="change(this);" onmouseout="revert(this);">Sample Code</a></h4>
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<div id="sample"><pre>
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#include <boost/preprocessor/list/adt.hpp>
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#define OLD /* ........... */ \
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BOOST_PP_LIST_CONS( \
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a, \
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BOOST_PP_LIST_CONS( \
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b, \
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BOOST_PP_LIST_CONS( \
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c, \
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BOOST_PP_LIST_NIL \
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) \
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) \
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) \
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/**/
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#define NEW (a, (b, (c, BOOST_PP_NIL)))
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BOOST_PP_LIST_FIRST(OLD) == BOOST_PP_LIST_FIRST(NEW)
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// expands to a == a
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BOOST_PP_LIST_REST(OLD) == BOOST_PP_LIST_REST(NEW)
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// expands to (b, (c, BOOST_PP_NIL)) == (b, (c, BOOST_PP_NIL))
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<pre></div>
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</body>
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</html>
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