#include <boost/foreach.hpp>
#include <boost/fusion/include/at_c.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include <boost/preprocessor/seq/for_each_i.hpp>

#define BOOST_FOREACH_ASSIGN_VAR(R, ROW, I, VAR)                                                                  \
  for (VAR = boost::fusion::at_c<I>(ROW); !BOOST_FOREACH_ID(_foreach_leave_outerloop);                            \
      BOOST_FOREACH_ID(_foreach_leave_outerloop) = true)

#define BOOST_FOREACH_FIELD(VARS, COL)                                                                            \
    BOOST_FOREACH_PREAMBLE()                                                                                      \
    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_col) = BOOST_FOREACH_CONTAIN(COL)) {} else   \
    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_cur) = BOOST_FOREACH_BEGIN(COL)) {} else     \
    if (boost::foreach_detail_::auto_any_t BOOST_FOREACH_ID(_foreach_end) = BOOST_FOREACH_END(COL)) {} else       \
    for (bool BOOST_FOREACH_ID(_foreach_continue) = true,                                                         \
              BOOST_FOREACH_ID(_foreach_leave_outerloop) = true;                                                  \
              BOOST_FOREACH_ID(_foreach_continue) && !BOOST_FOREACH_DONE(COL);                                    \
              BOOST_FOREACH_ID(_foreach_continue) ? BOOST_FOREACH_NEXT(COL) : (void)0)                            \
        if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_continue))) {} else                      \
        if  (boost::foreach_detail_::set_false(BOOST_FOREACH_ID(_foreach_leave_outerloop))) {} else               \
        BOOST_PP_SEQ_FOR_EACH_I(BOOST_FOREACH_ASSIGN_VAR, BOOST_FOREACH_DEREF(COL), VARS)                         \
        for (; !BOOST_FOREACH_ID(_foreach_continue); BOOST_FOREACH_ID(_foreach_continue) = true)