"../headers/control/while.html">boost/preprocessor/control/while.hpp</a>&gt;
#include &lt;<a href="../headers/tuple/elem.html">boost/preprocessor/tuple/elem.hpp</a>&gt;

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

#define OP(d, data) \
   ( \
      <a href="dec.html">BOOST_PP_DEC</a>( \
         <a href="tuple_elem.html">BOOST_PP_TUPLE_ELEM</a>(2, 0, data) \
      ), \
      <a href="sub_d.html">BOOST_PP_SUB_D</a>( \
         d, \
         <a href="tuple_elem.html">B