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+<html>
+<head>
+ <title>BOOST_PP_MUL_D</title>
+ <link rel="stylesheet" type="text/css" href="../styles.css">
+</head>
+<body>
+ <div style="margin-left: 0px;">
+ The <b>BOOST_PP_MUL_D</b> macro expands to the product of its second and third arguments.
+ It reenters <b>BOOST_PP_WHILE</b> with maximum efficiency.
+ </div>
+ <h4>Usage</h4>
+ <div class="code">
+ <b>BOOST_PP_MUL_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.
+ </dd>
+ <dt>x</dt>
+ <dd>
+ The multiplicand of the operation.
+ Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
+ </dd>
+ <dt>y</dt>
+ <dd>
+ The multiplier of the operation.
+ Valid values range from <i>0</i> to <b>BOOST_PP_LIMIT_MAG</b>.
+ </dd>
+ </dl>
+ <h4>Remarks</h4>
+ <div>
+ If the product of <i>x</i> and <i>y</i> is greater than <b>BOOST_PP_LIMIT_MAG</b>, the result is saturated to <b>BOOST_PP_LIMIT_MAG</b>.
+ </div>
+ <div>
+ This macro is the most efficient when <i>x</i> is greater than or equal to <i>y</i>.
+ However, the efficiency gain is not worth actually comparing the two arguments prior to invocation.
+ In other words, <i>x</i> should be the value that is <i>most likely</i> to be the largest of the two operands.
+ </div>
+ <h4>See Also</h4>
+ <ul>
+ <li><a href="limit_mag.html">BOOST_PP_LIMIT_MAG</a></li>
+ <li><a href="mul.html">BOOST_PP_MUL</a></li>
+ </ul>
+ <h4>Requirements</h4>
+ <div>
+ <b>Header:</b> <a href="../headers/arithmetic/mul.html"><boost/preprocessor/arithmetic/mul.hpp></a>
+ </div>
+ <h4>Sample Code</h4>
+<div><pre>
+#include <<a href="../headers/arithmetic/dec.html">boost/preprocessor/arithmetic/dec.hpp</a>>
+#include <<a href="../headers/arithmetic/mul.html">boost/preprocessor/arithmetic/mul.hpp</a>>
+#include <<a href="../headers/control/while.html">boost/preprocessor/control/while.hpp</a>>
+#include <<a href="../headers/tuple/elem.html">boost/preprocessor/tuple/elem.hpp</a>>
+
+#define PRED(d, data) <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 0, data)
+
+#define OP(d, data) \
+ ( \
+ <a href="dec.html">BOOST_PP_DEC</a>( \
+ <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 0, data) \
+ ), \
+ <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 1, data), \
+ <a href="mul_d.html">BOOST_PP_MUL_D</a>( \
+ d, \
+ <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 2, data), \
+ <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 1, data) \
+ ) \
+ ) \
+ /**/
+
+// raise 'x' to the 'n'-th power
+#define EXP(x, n) <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(3, 2, <a href="while.html">BOOST_PP_WHILE</a>(PRED, OP, (n, x, 1)))
+
+EXP(4, 2) // expands to 16
+EXP(2, 3) // expands to 8
+</pre></div>
+ <hr size="1">
+ <div style="margin-left: 0px;">
+ <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
+ </br><i>© Copyright Paul Mensonides 2002</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>