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1 | # /* ************************************************************************** |
2 | # * * | |
3 | # * (C) Copyright Edward Diener 2013. | |
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_TUPLE_POP_BACK_HPP | |
13 | # define BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP | |
14 | # | |
15 | # include <boost/preprocessor/config/config.hpp> | |
16 | # | |
17 | # if BOOST_PP_VARIADICS | |
18 | # | |
19 | # include <boost/preprocessor/array/pop_back.hpp> | |
20 | # include <boost/preprocessor/array/to_tuple.hpp> | |
21 | # include <boost/preprocessor/comparison/greater.hpp> | |
22 | # include <boost/preprocessor/control/iif.hpp> | |
23 | # include <boost/preprocessor/tuple/size.hpp> | |
24 | # include <boost/preprocessor/tuple/to_array.hpp> | |
25 | # | |
26 | # /* BOOST_PP_TUPLE_POP_BACK */ | |
27 | # | |
28 | # define BOOST_PP_TUPLE_POP_BACK(tuple) \ | |
29 | BOOST_PP_IIF \ | |
30 | ( \ | |
31 | BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ | |
32 | BOOST_PP_TUPLE_POP_BACK_EXEC, \ | |
33 | BOOST_PP_TUPLE_POP_BACK_RETURN \ | |
34 | ) \ | |
35 | (tuple) \ | |
36 | /**/ | |
37 | # | |
38 | # define BOOST_PP_TUPLE_POP_BACK_EXEC(tuple) \ | |
39 | BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK(BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ | |
40 | /**/ | |
41 | # | |
42 | # define BOOST_PP_TUPLE_POP_BACK_RETURN(tuple) tuple | |
43 | # | |
44 | # /* BOOST_PP_TUPLE_POP_BACK_Z */ | |
45 | # | |
46 | # define BOOST_PP_TUPLE_POP_BACK_Z(z, tuple) \ | |
47 | BOOST_PP_IIF \ | |
48 | ( \ | |
49 | BOOST_PP_GREATER(BOOST_PP_TUPLE_SIZE(tuple),1), \ | |
50 | BOOST_PP_TUPLE_POP_BACK_Z_EXEC, \ | |
51 | BOOST_PP_TUPLE_POP_BACK_Z_RETURN \ | |
52 | ) \ | |
53 | (z, tuple) \ | |
54 | /**/ | |
55 | # | |
56 | # define BOOST_PP_TUPLE_POP_BACK_Z_EXEC(z, tuple) \ | |
57 | BOOST_PP_ARRAY_TO_TUPLE(BOOST_PP_ARRAY_POP_BACK_Z(z, BOOST_PP_TUPLE_TO_ARRAY(tuple))) \ | |
58 | /**/ | |
59 | # | |
60 | # define BOOST_PP_TUPLE_POP_BACK_Z_RETURN(z, tuple) tuple | |
61 | # | |
62 | # endif // BOOST_PP_VARIADICS | |
63 | # | |
64 | # endif // BOOST_PREPROCESSOR_TUPLE_POP_BACK_HPP |