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[SVN r15693]
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Paul Mensonides
2002-10-03 22:13:37 +00:00
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<html>
<head>
<title>BOOST_PP_LIST_TO_TUPLE</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
</head>
<body>
<div style="margin-left: 0px;">
The <b>BOOST_PP_LIST_TO_TUPLE</b> macro converts a <i>list</i> to a <i>tuple</i>.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_LIST_TO_TUPLE</b>(<i>list</i>)
</div>
<h4>Arguments</h4>
<dl>
<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>
<div>
Previously, this macro could not be used inside <b>BOOST_PP_FOR</b>.&nbsp;
There is no longer any such restriction.&nbsp;
It is more efficient, however, to use <b>BOOST_PP_LIST_TO_TUPLE_R</b> in such a situation.
</div>
<h4>See Also</h4>
<ul>
<li><a href="list_to_tuple_r.html">BOOST_PP_LIST_TO_TUPLE_R</a></li>
</ul>
<h4>Requirements</h4>
<div>
<b>Header:</b> &nbsp;<a href="../headers/list/to_tuple.hpp.html">&lt;boost/preprocessor/list/to_tuple.hpp&gt;</a>
</div>
<h4>Sample Code</h4>
<div><pre>
#include &lt;<a href="../headers/list/to_tuple.hpp.html">boost/preprocessor/list/to_tuple.hpp</a>&gt;
#define LIST (w, (x, (y, (z, <a href="nil.html">BOOST_PP_NIL</a>))))
<a href="list_to_tuple.html">BOOST_PP_LIST_TO_TUPLE</a>(LIST) // expands to (w, x, y, z)
</pre></div>
</body>
</html>