first_n.hpp File Reference

#include <boost/preprocessor/arithmetic/dec.hpp>
#include <boost/preprocessor/config/config.hpp>
#include <boost/preprocessor/control/while.hpp>
#include <boost/preprocessor/list/adt.hpp>
#include <boost/preprocessor/list/reverse.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/preprocessor/tuple/rem.hpp>

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Macros
#define	BOOST_PP_LIST_FIRST_N(count, list)   BOOST_PP_LIST_FIRST_N_I(count, list)
#define	BOOST_PP_LIST_FIRST_N_I(count, list)   BOOST_PP_LIST_REVERSE(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL))))
#define	BOOST_PP_LIST_FIRST_N_P(d, data)   BOOST_PP_LIST_FIRST_N_P_I data
#define	BOOST_PP_LIST_FIRST_N_P_I(c, l, nl)   c
#define	BOOST_PP_LIST_FIRST_N_O(d, data)   BOOST_PP_LIST_FIRST_N_O_D(BOOST_PP_TUPLE_ELEM(3, 0, data), BOOST_PP_TUPLE_ELEM(3, 1, data), BOOST_PP_TUPLE_ELEM(3, 2, data))
#define	BOOST_PP_LIST_FIRST_N_O_D(c, l, nl)   (BOOST_PP_DEC(c), BOOST_PP_LIST_REST(l), (BOOST_PP_LIST_FIRST(l), nl))
#define	BOOST_PP_LIST_FIRST_N_D(d, count, list)   BOOST_PP_LIST_FIRST_N_D_I(d, count, list)
#define	BOOST_PP_LIST_FIRST_N_D_I(d, count, list)   BOOST_PP_LIST_REVERSE_D(d, BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL))))

Macro Definition Documentation

#define BOOST_PP_LIST_FIRST_N	(		count,
			list
	)		BOOST_PP_LIST_FIRST_N_I(count, list)

#define BOOST_PP_LIST_FIRST_N_D	(		d,
			count,
			list
	)		BOOST_PP_LIST_FIRST_N_D_I(d, count, list)

#define BOOST_PP_LIST_FIRST_N_D_I	(		d,
			count,
			list
	)		BOOST_PP_LIST_REVERSE_D(d, BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL))))

#define BOOST_PP_LIST_FIRST_N_I	(		count,
			list
	)		BOOST_PP_LIST_REVERSE(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL))))

#define BOOST_PP_LIST_FIRST_N_O	(		d,
			data
	)		BOOST_PP_LIST_FIRST_N_O_D(BOOST_PP_TUPLE_ELEM(3, 0, data), BOOST_PP_TUPLE_ELEM(3, 1, data), BOOST_PP_TUPLE_ELEM(3, 2, data))

#define BOOST_PP_LIST_FIRST_N_O_D	(		c,
			l,
			nl
	)		(BOOST_PP_DEC(c), BOOST_PP_LIST_REST(l), (BOOST_PP_LIST_FIRST(l), nl))

#define BOOST_PP_LIST_FIRST_N_P	(		d,
			data
	)		BOOST_PP_LIST_FIRST_N_P_I data

#define BOOST_PP_LIST_FIRST_N_P_I	(		c,
			l,
			nl
	)		c