fold_left.hpp

C++的一个好库。。。现在很流行

# /* Copyright (C) 2001
#  * Housemarque Oy
#  * http://www.housemarque.com
#  *
#  * Distributed under the Boost Software License, Version 1.0. (See
#  * accompanying file LICENSE_1_0.txt or copy at
#  * http://www.boost.org/LICENSE_1_0.txt)
#  */
#
# /* Revised by Paul Mensonides (2002) */
#
# /* See http://www.boost.org for most recent version. */
#
# ifndef BOOST_PREPROCESSOR_LIST_DETAIL_FOLD_LEFT_HPP
# define BOOST_PREPROCESSOR_LIST_DETAIL_FOLD_LEFT_HPP
#
# include <boost/preprocessor/control/expr_iif.hpp>
# include <boost/preprocessor/control/iif.hpp>
# include <boost/preprocessor/list/adt.hpp>
# include <boost/preprocessor/tuple/elem.hpp>
#
# define BOOST_PP_LIST_FOLD_LEFT_1(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_2, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(2, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_2(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_3, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(3, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_3(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_4, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(4, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_4(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_5, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(5, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_5(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_6, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(6, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_6(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_7, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(7, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_7(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_8, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(8, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_8(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_9, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(9, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_9(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_10, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(10, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_10(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_11, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(11, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_11(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_12, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(12, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_12(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_13, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(13, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_13(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_14, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(14, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_14(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_15, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(15, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_15(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_16, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(16, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_16(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_17, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(17, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_17(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_18, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(18, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_18(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_19, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(19, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_19(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_20, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(20, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_20(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_21, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(21, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_21(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_22, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(22, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_22(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_23, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(23, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_23(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_24, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(24, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_24(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_25, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(25, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_25(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_26, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(26, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_26(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_27, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(27, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_27(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_28, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(28, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_28(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_29, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(29, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_29(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_30, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(30, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_30(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_31, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(31, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_31(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_32, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(32, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_32(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_33, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(33, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_33(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_34, BOOST_PP_TUPLE_ELEM_3_1)(o, BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), o, BOOST_PP_TUPLE_ELEM_3_1)(34, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))