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| 2 | // (C) Copyright Edward Diener 2011-2015 |
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| 3 | // Use, modification and distribution are subject to the Boost Software License, |
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| 4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt). |
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| 6 | |
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| 7 | #if !defined(BOOST_VMD_IS_NUMBER_HPP) |
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| 8 | #define BOOST_VMD_IS_NUMBER_HPP |
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| 9 | |
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| 10 | #include <boost/vmd/detail/setup.hpp> |
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| 11 | |
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| 12 | #if BOOST_PP_VARIADICS |
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| 13 | |
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| 14 | #include <boost/vmd/detail/is_number.hpp> |
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| 15 | |
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| 16 | /* |
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| 17 | |
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| 18 | The succeeding comments in this file are in doxygen format. |
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| 19 | |
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| 20 | */ |
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| 21 | |
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| 22 | /** \file |
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| 23 | */ |
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| 24 | |
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| 25 | /** \def BOOST_VMD_IS_NUMBER(sequence) |
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| 26 | |
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| 27 | \brief Tests whether a sequence is a Boost PP number. |
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| 28 | |
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| 29 | The macro checks to see if a sequence is a Boost PP number. |
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| 30 | A Boost PP number is a value from 0 to 256. |
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| 31 | |
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| 32 | sequence = a possible number |
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| 33 | |
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| 34 | returns = 1 if the sequence is a Boost PP number, |
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| 35 | 0 if it is not. |
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| 36 | |
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| 37 | If the input is not a VMD data type this macro could lead to |
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| 38 | a preprocessor error. This is because the macro |
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| 39 | uses preprocessor concatenation to determine if the input |
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| 40 | is a number once it is determined that the input does not |
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| 41 | start with parenthesis. If the data being concatenated would |
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| 42 | lead to an invalid preprocessor token the compiler can issue |
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| 43 | a preprocessor error. |
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| 44 | |
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| 45 | */ |
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| 46 | |
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| 47 | #define BOOST_VMD_IS_NUMBER(sequence) \ |
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| 48 | BOOST_VMD_DETAIL_IS_NUMBER(sequence) \ |
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| 49 | /**/ |
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| 50 | |
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| 51 | #endif /* BOOST_PP_VARIADICS */ |
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| 52 | #endif /* BOOST_VMD_IS_NUMBER_HPP */ |
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| 53 | |
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