[ceph.git] / ceph / src / boost / libs / preprocessor / doc / ref / nil.html

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	<title>BOOST_PP_NIL</title>
	<link rel="stylesheet" type="text/css" href="../styles.css">
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		The <b>BOOST_PP_NIL</b> identifier is reserved by the library to indicate a non-macro.
	</div>
	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_NIL</b>
		</div>
	<h4>Remarks</h4>
		<div>
			This identifier is <i>not</i> defined.&nbsp;
			Its purpose is to <i>not be a macro</i>.&nbsp;
			It is also used to terminate a <i>list</i>.
		</div>
	<h4>Sample Code</h4>
<div><pre>
#include &lt;<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>&gt;

#define LIST (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>)))

<a href="list_first.html">BOOST_PP_LIST_FIRST</a>(x) // expands to x
<a href="list_rest.html">BOOST_PP_LIST_REST</a>(x) // expands to (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))
</pre></div>
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Commit	Line	Data
7c673cae FG	1	<html>
	2	<head>
	3	<title>BOOST_PP_NIL</title>
	4	<link rel="stylesheet" type="text/css" href="../styles.css">
	5	</head>
	6	<body>
	7	<div style="margin-left: 0px;">
	8	The <b>BOOST_PP_NIL</b> identifier is reserved by the library to indicate a non-macro.
	9	</div>
	10	<h4>Usage</h4>
	11	<div class="code">
	12	<b>BOOST_PP_NIL</b>
	13	</div>
	14	<h4>Remarks</h4>
	15	<div>
	16	This identifier is <i>not</i> defined.
	17	Its purpose is to <i>not be a macro</i>.
	18	It is also used to terminate a <i>list</i>.
	19	</div>
	20	<h4>Sample Code</h4>
	21	<div><pre>
	22	#include <<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>>
	23
	24	#define LIST (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>)))
	25
	26	<a href="list_first.html">BOOST_PP_LIST_FIRST</a>(x) // expands to x
	27	<a href="list_rest.html">BOOST_PP_LIST_REST</a>(x) // expands to (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))
	28	</pre></div>
	29	<hr size="1">
	30	<div style="margin-left: 0px;">
	31