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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_IS_SEQ_HPP) | |
8 | #define BOOST_VMD_IS_SEQ_HPP | |
9 | ||
10 | #include <boost/vmd/detail/setup.hpp> | |
11 | ||
12 | #if BOOST_PP_VARIADICS | |
13 | ||
14 | #include <boost/vmd/detail/is_seq.hpp> | |
15 | ||
16 | /* | |
17 | ||
18 | The succeeding comments in this file are in doxygen format. | |
19 | ||
20 | */ | |
21 | ||
22 | /** \file | |
23 | */ | |
24 | ||
25 | /** \def BOOST_VMD_IS_SEQ(sequence) | |
26 | ||
27 | \brief Determines if a sequence is a Boost PP seq. | |
28 | ||
29 | The macro checks that the sequence is a Boost PP seq. | |
30 | It returns 1 if it is a seq, else if returns 0. | |
31 | ||
32 | sequence = a possible Boost PP seq | |
33 | ||
34 | returns = 1 if it a seq, else returns 0. | |
35 | ||
36 | A single set of parentheses, with a single element, | |
37 | is parsed as a tuple and not a seq. To be parsed as | |
38 | a seq the input needs to be more than one consecutive | |
39 | sets of parentheses, each with a single element of data. | |
40 | ||
41 | */ | |
42 | ||
43 | #define BOOST_VMD_IS_SEQ(sequence) \ | |
44 | BOOST_VMD_DETAIL_IS_SEQ(sequence) \ | |
45 | /**/ | |
46 | ||
47 | /** \def BOOST_VMD_IS_SEQ_D(d,sequence) | |
48 | ||
49 | \brief Determines if a sequence is a Boost PP seq. Re-entrant version. | |
50 | ||
51 | The macro checks that the sequence is a Boost PP seq. | |
52 | It returns 1 if it is a seq, else if returns 0. | |
53 | ||
54 | d = The next available BOOST_PP_WHILE iteration. | |
55 | sequence = a possible Boost PP seq | |
56 | ||
57 | returns = 1 if it a seq, else returns 0. | |
58 | ||
59 | A single set of parentheses, with a single element, | |
60 | is parsed as a tuple and not a seq. To be parsed as | |
61 | a seq the input needs to be more than one consecutive | |
62 | sets of parentheses, each with a single element of data. | |
63 | ||
64 | */ | |
65 | ||
66 | #define BOOST_VMD_IS_SEQ_D(d,sequence) \ | |
67 | BOOST_VMD_DETAIL_IS_SEQ_D(d,sequence) \ | |
68 | /**/ | |
69 | ||
70 | #endif /* BOOST_PP_VARIADICS */ | |
71 | #endif /* BOOST_VMD_IS_SEQ_HPP */ |