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 |
65 | |