projects / ceph.git / blame
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| 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. | |
| 20effc67 | 30 | A Boost PP number is a value from 0 to BOOST_PP_LIMIT_MAG. |
| 7c673cae FG |
31 | |
| 32 | sequence = a possible number | |
| 33 | ||
| f67539c2 | 34 | returns = 1 if the sequence is a Boost PP number, |
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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 */ |