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<html>
<head>
<title>BOOST_PP_LIST_ENUM_R</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
<div style="margin-left: 0px;">
The <b>BOOST_PP_LIST_ENUM_R</b> macro converts a <i>list</i> to a comma-separated list.
It reenters <b>BOOST_PP_FOR</b> with maximum efficiency.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_LIST_ENUM_R</b>(<i>r</i>, <i>list</i>)
</div>
<h4>Arguments</h4>
<dl>
<dt>r</dt>
<dd>
The next available <b>BOOST_PP_FOR</b> repetition.
</dd>
<dt>list</dt>
<dd>
The <i>list</i> to be converted.
</dd>
</dl>
<h4>Remarks</h4>
<div>
If <i>list</i> is, for example, (<i>a</i>, (<i>b</i>, (<i>c</i>, <b>BOOST_PP_NIL</b>))),
this macro will produce:
<div>
<i>a</i>, <i>b</i>, <i>c</i>
</div>
</div>
<h4>See Also</h4>
<ul>
<li><a href="list_enum.html">BOOST_PP_LIST_ENUM</a></li>
</ul>
<h4>Requirements</h4>
<div>
<b>Header:</b> <a href="../headers/list/enum.html"><boost/preprocessor/list/enum.hpp></a>
</div>
<h4>Sample Code</h4>
<div><pre>
#include <<a href="../headers/list/adt.html">boost/preprocessor/list/adt.hpp</a>>
#include <<a href="../headers/repetition/for.html">boost/preprocessor/repetition/for.hpp</a>>
#include <<a href="../headers/list/enum.html">boost/preprocessor/list/enum.hpp</a>>
#define LIST (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>)))
#define PRED(r, state) <a href="list_is_cons.html">BOOST_PP_LIST_IS_CONS</a>(state)
#define OP(r, state) <a href="list_rest.html">BOOST_PP_LIST_REST</a>(state)
#define MACRO(r, state) [ <a href="list_enum_r.html">BOOST_PP_LIST_ENUM_R</a>(r, state) ]
<a href="for.html">BOOST_PP_FOR</a>(LIST, PRED, OP, MACRO)
// expands to [x, y, z] [y, z] [z]
</pre></div>
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