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[SVN r15198]
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Paul Mensonides
2002-09-08 09:40:56 +00:00
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<html>
<head>
<title>BOOST_PP_MAX_D</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
<script language="javascript" type="text/javascript" src="../scripts.js"></script>
</head>
<body onload="init('sample');">
<div style="margin-left: 0px;">
The <b>BOOST_PP_MAX_D</b> macro expands to the greater of its second and third arguments.&nbsp;
It reenters <b>BOOST_PP_WHILE</b> with maximum efficiency.
</div>
<h4>Usage</h4>
<div class="code">
<b>BOOST_PP_MAX_D</b>(<i>d</i>, <i>x</i>, <i>y</i>)
</div>
<h4>Arguments</h4>
<dl>
<dt>d</dt>
<dd>
The next available <b>BOOST_PP_WHILE</b> iteration.&nbsp;
</dd>
<dt>x</dt>
<dd>
The first operand.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
</dd>
<dt>y</dt>
<dd>
The second operand.&nbsp;
Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
</dd>
</dl>
<h4>Remarks</h4>
<div>
This macro returns the greater of its first and second arguments or the value of both arguments if they are equal.
</div>
<h4>See Also</h4>
<ul>
<li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
<li><a href="max.html">BOOST_PP_MAX</a></li>
</ul>
<h4>Requirements</h4>
<div>
<b>Header:</b> &nbsp;<a href="../headers/selection/max.hpp.html">&lt;boost/preprocessor/selection/max.hpp&gt;</a>
</div>
<h4><a class="local" onclick="toggle('sample');" onmouseover="change(this);" onmouseout="revert(this);">Sample Code</a></h4>
<div id="sample"><pre>
#include &lt;boost/preprocessor/list/fold_left.hpp&gt;
#include &lt;boost/preprocessor/selection/max.hpp&gt;
#define LIST (1, (3, (5, (2, (4, BOOST_PP_NIL)))))
#define OP(d, state, x) BOOST_PP_MAX_D(d, state, x)
#define LIST_MAX(list) BOOST_PP_LIST_FOLD_LEFT(OP, 0, LIST)
LIST_MAX(LIST) // expands to 5
<pre></div>
</body>
</html>