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limited variadic support

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[SVN r72763]
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Paul Mensonides
2011-06-26 13:07:20 +00:00
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<html>
<head>
<title>BOOST_PP_VARIADIC_ELEM</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
<div style="margin-left: 0px;"> The <b>BOOST_PP_VARIADIC_ELEM</b> variadic macro
extracts an element from <i>variadic data</i>. </div>
<h4>Usage</h4>
<div class="code"> <b>BOOST_PP_VARIADIC_ELEM</b>(<i>i</i>, <i>...</i>) <sup>(v)</sup><br>
</div>
<h4>Arguments</h4>
<dl><dt>i</dt>
<dd> The zero-based index into the <i>variadic data</i> of the element to be
extracted.&nbsp; Valid values range from <i>0</i> to the size of the variadic data - 1.
</dd>
<dt>...<br>
</dt>
<dd> The <i>variadic data</i> from which an element is to be extracted. </dd>
</dl>
<h4>Remarks</h4>
<div>The index <i>i</i> must be less than the size of the <i>variadic data</i>. </div>
<h4>See Also</h4>
<ul>
<li><a href="limit_variadic.html">BOOST_PP_LIMIT_VARIADIC</a></li>
</ul>
<h4>Requirements</h4>
<div> <b>Header:</b> &nbsp;<a href="../headers/variadic/elem.html">&lt;boost/preprocessor/variadic/elem.hpp&gt;</a>
</div>
<h4>Sample Code</h4>
<div>
<pre>#include &lt;<a href="../headers/variadic/elem.html">boost/preprocessor/variadic/elem.hpp</a>&gt;<br><br>#define VAR_DATA a, b, c, d<br><br><a href="variadic_elem.html">BOOST_PP_VARIADIC_ELEM</a>(0, VAR_DATA) // expands to a<br><a href="variadic_elem.html">BOOST_PP_VARIADIC_ELEM</a>(3, VAR_DATA) // expands to d<br></pre>
</div>
<hr size="1">
<div style="margin-left: 0px;"> <i></i><i><EFBFBD> Copyright Edward Diener 2011</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>