1 | |
2 | // (C) Copyright Edward Diener 2011-2015 |
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_ASSERT_IS_TUPLE_HPP) |
8 | #define BOOST_VMD_ASSERT_IS_TUPLE_HPP |
9 | |
10 | #include <boost/vmd/detail/setup.hpp> |
11 | |
12 | #if BOOST_PP_VARIADICS |
13 | |
14 | /* |
15 | |
16 | The succeeding comments in this file are in doxygen format. |
17 | |
18 | */ |
19 | |
20 | /** \file |
21 | */ |
22 | |
23 | /** \def BOOST_VMD_ASSERT_IS_TUPLE(sequence) |
24 | |
25 | \brief Asserts that the sequence is a Boost PP tuple. |
26 | |
27 | The macro checks that the sequence is a Boost PP tuple. |
28 | If it is not a Boost PP tuple, it forces a compiler error. |
29 | |
30 | The macro normally checks for a Boost PP tuple only in |
31 | debug mode. However an end-user can force the macro |
32 | to check or not check by defining the macro |
33 | BOOST_VMD_ASSERT_DATA to 1 or 0 respectively. |
34 | |
35 | sequence = a possible Boost PP tuple. |
36 | |
37 | returns = Normally the macro returns nothing. |
38 | |
39 | If the sequence is a Boost PP tuple, nothing is |
40 | output. |
41 | |
42 | For VC++, because there is no sure way of forcing |
43 | a compiler error from within a macro without producing |
44 | output, if the sequence is not a Boost PP tuple the |
45 | macro forces a compiler error by outputting invalid C++. |
46 | |
47 | For all other compilers a compiler error is forced |
48 | without producing output if the sequence is not a |
49 | Boost PP tuple. |
50 | |
51 | */ |
52 | |
53 | #if !BOOST_VMD_ASSERT_DATA |
54 | |
55 | #define BOOST_VMD_ASSERT_IS_TUPLE(sequence) |
56 | |
57 | #else |
58 | |
59 | #include <boost/vmd/assert.hpp> |
60 | #include <boost/vmd/is_tuple.hpp> |
61 | |
62 | #define BOOST_VMD_ASSERT_IS_TUPLE(sequence) \ |
63 | BOOST_VMD_ASSERT \ |
64 | ( \ |
65 | BOOST_VMD_IS_TUPLE(sequence), \ |
66 | BOOST_VMD_ASSERT_IS_TUPLE_ERROR \ |
67 | ) \ |
68 | /**/ |
69 | |
70 | #endif /* BOOST_VMD_ASSERT_DATA */ |
71 | |
72 | #endif /* BOOST_PP_VARIADICS */ |
73 | #endif /* BOOST_VMD_ASSERT_IS_TUPLE_HPP */ |
74 | |