1 | # /* ************************************************************************** |
2 | # * * |
3 | # * (C) Copyright Paul Mensonides 2002. |
4 | # * Distributed under the Boost Software License, Version 1.0. (See |
5 | # * accompanying file LICENSE_1_0.txt or copy at |
6 | # * http://www.boost.org/LICENSE_1_0.txt) |
7 | # * * |
8 | # ************************************************************************** */ |
9 | # |
10 | # /* See http://www.boost.org for most recent version. */ |
11 | # |
12 | # ifndef BOOST_PREPROCESSOR_SEQ_FILTER_HPP |
13 | # define BOOST_PREPROCESSOR_SEQ_FILTER_HPP |
14 | # |
15 | # include <boost/preprocessor/config/config.hpp> |
16 | # include <boost/preprocessor/control/expr_if.hpp> |
17 | # include <boost/preprocessor/facilities/empty.hpp> |
18 | # include <boost/preprocessor/seq/fold_left.hpp> |
19 | # include <boost/preprocessor/seq/seq.hpp> |
20 | # include <boost/preprocessor/tuple/elem.hpp> |
21 | # include <boost/preprocessor/tuple/rem.hpp> |
22 | # |
23 | # /* BOOST_PP_SEQ_FILTER */ |
24 | # |
25 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() |
26 | # define BOOST_PP_SEQ_FILTER(pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq))) |
27 | # else |
28 | # define BOOST_PP_SEQ_FILTER(pred, data, seq) BOOST_PP_SEQ_FILTER_I(pred, data, seq) |
29 | # define BOOST_PP_SEQ_FILTER_I(pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq))) |
30 | # endif |
31 | # |
32 | # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT() |
33 | # define BOOST_PP_SEQ_FILTER_O(s, st, elem) BOOST_PP_SEQ_FILTER_O_IM(s, BOOST_PP_TUPLE_REM_3 st, elem) |
34 | # define BOOST_PP_SEQ_FILTER_O_IM(s, im, elem) BOOST_PP_SEQ_FILTER_O_I(s, im, elem) |
35 | # else |
36 | # define BOOST_PP_SEQ_FILTER_O(s, st, elem) BOOST_PP_SEQ_FILTER_O_I(s, BOOST_PP_TUPLE_ELEM(3, 0, st), BOOST_PP_TUPLE_ELEM(3, 1, st), BOOST_PP_TUPLE_ELEM(3, 2, st), elem) |
37 | # endif |
38 | # |
39 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_DMC() |
40 | # define BOOST_PP_SEQ_FILTER_O_I(s, pred, data, res, elem) (pred, data, res BOOST_PP_EXPR_IF(pred(s, data, elem), (elem))) |
41 | # else |
42 | # define BOOST_PP_SEQ_FILTER_O_I(s, pred, data, res, elem) (pred, data, res BOOST_PP_EXPR_IF(pred##(s, data, elem), (elem))) |
43 | # endif |
44 | # |
45 | # /* BOOST_PP_SEQ_FILTER_S */ |
46 | # |
47 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() |
48 | # define BOOST_PP_SEQ_FILTER_S(s, pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq))) |
49 | # else |
50 | # define BOOST_PP_SEQ_FILTER_S(s, pred, data, seq) BOOST_PP_SEQ_FILTER_S_I(s, pred, data, seq) |
51 | # define BOOST_PP_SEQ_FILTER_S_I(s, pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq))) |
52 | # endif |
53 | # |
54 | # endif |
55 | |