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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 */ |