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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_NUMBER_HPP) | |
8 | #define BOOST_VMD_IS_NUMBER_HPP | |
9 | ||
10 | #include <boost/vmd/detail/setup.hpp> | |
11 | ||
12 | #if BOOST_PP_VARIADICS | |
13 | ||
14 | #include <boost/vmd/detail/is_number.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_NUMBER(sequence) | |
26 | ||
27 | \brief Tests whether a sequence is a Boost PP number. | |
28 | ||
29 | The macro checks to see if a sequence is a Boost PP number. | |
30 | A Boost PP number is a value from 0 to 256. | |
31 | ||
32 | sequence = a possible number | |
33 | ||
34 | returns = 1 if the sequence is a Boost PP number, | |
35 | 0 if it is not. | |
36 | ||
37 | If the input is not a VMD data type this macro could lead to | |
38 | a preprocessor error. This is because the macro | |
39 | uses preprocessor concatenation to determine if the input | |
40 | is a number once it is determined that the input does not | |
41 | start with parenthesis. If the data being concatenated would | |
42 | lead to an invalid preprocessor token the compiler can issue | |
43 | a preprocessor error. | |
44 | ||
45 | */ | |
46 | ||
47 | #define BOOST_VMD_IS_NUMBER(sequence) \ | |
48 | BOOST_VMD_DETAIL_IS_NUMBER(sequence) \ | |
49 | /**/ | |
50 | ||
51 | #endif /* BOOST_PP_VARIADICS */ | |
52 | #endif /* BOOST_VMD_IS_NUMBER_HPP */ |