63 lines
2.4 KiB
HTML
63 lines
2.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=windows-1252">
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<title>BOOST_PP_LIST_ENUM</title>
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<link rel="stylesheet" type="text/css" href="../styles.css">
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</head>
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<body>
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<div style="margin-left: 0px;"> The <b>BOOST_PP_LIST_ENUM</b> macro
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converts a <i>list</i> to a comma-separated list. </div>
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<h4>Usage</h4>
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<div class="code"> <b>BOOST_PP_LIST_ENUM</b>(<i>list</i>) </div>
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<h4>Arguments</h4>
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<dl>
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<dt>list</dt>
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<dd> The <i>list</i> to be converted. </dd>
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</dl>
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<h4>Remarks</h4>
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<div> If <i>list</i> is, for example, (<i>a</i>, (<i>b</i>, (<i>c</i>,
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<b>BOOST_PP_NIL</b>))), this macro will produce:
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<div> <i>a</i>, <i>b</i>, <i>c</i> </div>
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</div>
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<div> Previously, this macro could not be used inside <b>BOOST_PP_FOR</b>.
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There is no longer any such restriction. It is more
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efficient, however, to use <b>BOOST_PP_LIST_ENUM_R</b> in such a
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situation.<br>
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<br>
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In <a
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href="file:///E:/Programming/VersionControl/modular-boost/libs/preprocessor/doc/topics/variadic_macros.html#C20_Support_For_Variadic_Macros">C++
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20</a> mode if the list is empty the resulting <i>variadic</i>
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<i>data</i> will be empty.</div>
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<h4>See Also</h4>
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<ul>
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<li><a href="list_enum_r.html">BOOST_PP_LIST_ENUM_R</a></li>
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</ul>
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<h4>Requirements</h4>
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<div> <b>Header:</b> <a href="../headers/list/enum.html"><boost/preprocessor/list/enum.hpp></a>
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</div>
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<h4>Sample Code</h4>
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<div>
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<pre>#include <<a href="../headers/list/enum.html">boost/preprocessor/list/enum.hpp</a>>
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#define LIST (w, (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))))
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<a href="list_enum.html">BOOST_PP_LIST_ENUM</a>(LIST) // expands to w, x, y, z
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</pre>
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</div>
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<hr size="1">
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<div style="margin-left: 0px;"> <i>© Copyright <a
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href="http://www.housemarque.com" target="_top">Housemarque Oy</a>
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2002</i> <br>
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<i>© Copyright Paul Mensonides 2002</i> </div>
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<div style="margin-left: 0px;">
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<p><small>Distributed under the Boost Software License, Version
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1.0. (See accompanying file <a
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href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
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copy at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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</div>
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</body>
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</html>
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