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	<title>BOOST_PP_LIST_FOR_EACH_PRODUCT_R</title>
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	<div style="margin-left:  0px;">
		The <b>BOOST_PP_LIST_FOR_EACH_PRODUCT_R</b> macro repeats a macro for each cartesian product of several <i>lists</i>.&nbsp;
		It reenters <b>BOOST_PP_FOR</b> with maximum efficiency.
	</div>
	<h4>Usage</h4>
		<div class="code">
			<b>BOOST_PP_LIST_FOR_EACH_PRODUCT_R</b>(<i>r</i>, <i>macro</i>, <i>size</i>, <i>tuple</i>)
		</div>
	<h4>Arguments</h4>
		<dl>
			<dt>r</dt>
			<dd>
				The next available <b>BOOST_PP_FOR</b> repetition.
			</dd>
			<dt>macro</dt>
			<dd>
				The binary macro of the form <i>macro</i>(<i>r</i>, <i>product</i>).&nbsp;
				This macro is expanded by <b>BOOST_PP_FOR_EACH_PRODUCT</b> with each cartesian product in <i>tuple</i>.&nbsp;
				It is expanded with the next available <b>BOOST_PP_FOR</b> repetition and a <i>tuple</i> containing a cartesian product.&nbsp;
				This <i>tuple</i> will have <i>size</i> elements.
			</dd>
			<dt>size</dt>
			<dd>
				The size of <i>tuple</i>.
			</dd>
			<dt>tuple</dt>
			<dd>
				A <i>tuple</i> of <i>lists</i> from which cartesian products are obtained.
			</dd>
		</dl>
	<h4>Remarks</h4>
		<div>
			This macro is a repetition construct.&nbsp;
			If two <i>lists</i> are (<i>a</i>, (<i>b</i>, (<i>c</i>, <b>BOOST_PP_NIL</b>))) and (<i>x</i>, (<i>y</i>, (<i>z</i>, <b>BOOST_PP_NIL</b>))),
			this macro will produce the following sequence:
			<div>
				<i>macro</i>(<i>r</i>, (<i>a</i>, <i>x</i>))
				<i>macro</i>(<i>r</i>, (<i>a</i>, <i>y</i>))
				<i>macro</i>(<i>r</i>, (<i>a</i>, <i>z</i>))<br>
				<i>macro</i>(<i>r</i>, (<i>b</i>, <i>x</i>))
				<i>macro</i>(<i>r</i>, (<i>b</i>, <i>y</i>))
				<i>macro</i>(<i>r</i>, (<i>b</i>, <i>z</i>))<br>
				<i>macro</i>(<i>r</i>, (<i>c</i>, <i>x</i>))
				<i>macro</i>(<i>r</i>, (<i>c</i>, <i>y</i>))
				<i>macro</i>(<i>r</i>, (<i>c</i>, <i>z</i>))
			</div>
		</div>
	<h4>See Also</h4>
		<ul>
			<li><a href="list_for_each_product.html">BOOST_PP_LIST_FOR_EACH_PRODUCT</a></li>
		</ul>
	<h4>Requirements</h4>
		<div>
			<b>Header:</b> &nbsp;<a href="../headers/list/for_each_product.html">&lt;boost/preprocessor/list/for_each_product.hpp&gt;</a>
		</div>
	<h4>Sample Code</h4>
<div><pre>
#include &lt;<a href="../headers/arithmetic/dec.html">boost/preprocessor/arithmetic/dec.hpp</a>&gt;
#include &lt;<a href="../headers/list/for_each_product.html">boost/preprocessor/list/for_each_product.hpp</a>&gt;
#include &lt;<a href="../headers/repetition/for.html">boost/preprocessor/repetition/for.hpp</a>&gt;
#include &lt;<a href="../headers/tuple/elem.html">boost/preprocessor/tuple/elem.hpp</a>&gt;

#define L1 (a, (b, <a href="nil.html">BOOST_PP_NIL</a>))
#define L2 (x, (y, <a href="nil.html">BOOST_PP_NIL</a>))

#define PRED(r, state) <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 0, state)

#define OP(r, state) \
   ( \
      <a href="dec.html">BOOST_PP_DEC</a>( \
         <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 0, state) \
      ), \
      <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 1, state) \
   ) \
   /**/

#define MACRO(r, state) \
   MACRO_I( \
      r, \
      <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 0, state), \
      <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 1, state) \
   ) \
   /**/

#define MACRO_I(r, c, t) \
   <a href="list_for_each_product_r.html">BOOST_PP_LIST_FOR_EACH_PRODUCT_R</a>( \
      r, MACRO_P, 2, \
      ( \
         <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, <a href="dec.html">BOOST_PP_DEC</a>(c), t), \
         <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, <a href="dec.html">BOOST_PP_DEC</a>(c), t) \
      ) \
   ) \
   /**/

#define MACRO_P(r, product) product

<a href="for.html">BOOST_PP_FOR</a>((2, (L1, L2)), PRED, OP, MACRO)
   // expands to (x, x) (x, y) (y, x) (y, y) (a, a) (a, b) (b, a) (b, b)
</pre></div>
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	<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>
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