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/eat.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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(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, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(34, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_34(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_35, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(35, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))
# define BOOST_PP_LIST_FOLD_LEFT_35(o, s, l) BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(l), BOOST_PP_LIST_FOLD_LEFT_36, s BOOST_PP_TUPLE_EAT_3)(o, BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(l), o)(36, s, BOOST_PP_LIST_FIRST(l)), BOOST_PP_LIST_REST(l))