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1 | ||
2 | // (C) Copyright Edward Diener 2015 | |
3 | // Use, modification and distribution are subject to the Boost Software License, | |
4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt). | |
6 | ||
7 | #if !defined(BOOST_VMD_LIST_TO_TUPLE_HPP) | |
8 | #define BOOST_VMD_LIST_TO_TUPLE_HPP | |
9 | ||
10 | #include <boost/vmd/detail/setup.hpp> | |
11 | ||
12 | #if BOOST_PP_VARIADICS | |
13 | ||
14 | #include <boost/preprocessor/control/iif.hpp> | |
15 | #include <boost/preprocessor/list/to_tuple.hpp> | |
16 | #include <boost/vmd/empty.hpp> | |
17 | #include <boost/vmd/is_empty_list.hpp> | |
18 | ||
19 | /* | |
20 | ||
21 | The succeeding comments in this file are in doxygen format. | |
22 | ||
23 | */ | |
24 | ||
25 | /** \file | |
26 | */ | |
27 | ||
28 | /** \def BOOST_VMD_LIST_TO_TUPLE(list) | |
29 | ||
30 | \brief converts a list to a tuple. | |
31 | ||
32 | list = list to be converted. | |
33 | ||
34 | If the list is an empty list (BOOST_PP_NIL) it is converted to an empty tuple. | |
35 | Otherwise the list is converted to a tuple with the same number of elements as the list. | |
36 | */ | |
37 | ||
38 | #define BOOST_VMD_LIST_TO_TUPLE(list) \ | |
39 | BOOST_PP_IIF \ | |
40 | ( \ | |
41 | BOOST_VMD_IS_EMPTY_LIST(list), \ | |
42 | BOOST_VMD_EMPTY, \ | |
43 | BOOST_PP_LIST_TO_TUPLE \ | |
44 | ) \ | |
45 | (list) \ | |
46 | /**/ | |
47 | ||
48 | #endif /* BOOST_PP_VARIADICS */ | |
49 | #endif /* BOOST_VMD_LIST_TO_TUPLE_HPP */ |