boost/vmd/is_number.hpp

0001
0002 //  (C) Copyright Edward Diener 2011-2015
0003 //  Use, modification and distribution are subject to the Boost Software License,
0004 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0005 //  http://www.boost.org/LICENSE_1_0.txt).
0006
0007 #if !defined(BOOST_VMD_IS_NUMBER_HPP)
0008 #define BOOST_VMD_IS_NUMBER_HPP
0009
0010 #include <boost/vmd/detail/setup.hpp>
0011
0012 #if BOOST_PP_VARIADICS
0013
0014 #include <boost/vmd/detail/is_number.hpp>
0015
0016 /*
0017
0018   The succeeding comments in this file are in doxygen format.
0019
0020 */
0021
0022 /** \file
0023 */
0024
0025 /** \def BOOST_VMD_IS_NUMBER(sequence)
0026
0027     \brief Tests whether a sequence is a Boost PP number.
0028
0029     The macro checks to see if a sequence is a Boost PP number.
0030     A Boost PP number is a value from 0 to BOOST_PP_LIMIT_MAG.
0031
0032     sequence = a possible number
0033
0034     returns = 1 if the sequence is a Boost PP number,
0035               0 if it is not.
0036
0037     If the input is not a VMD data type this macro could lead to
0038     a preprocessor error. This is because the macro
0039     uses preprocessor concatenation to determine if the input
0040     is a number once it is determined that the input does not
0041     start with parenthesis. If the data being concatenated would
0042     lead to an invalid preprocessor token the compiler can issue
0043     a preprocessor error.
0044
0045 */
0046
0047 #define BOOST_VMD_IS_NUMBER(sequence) \
0048     BOOST_VMD_DETAIL_IS_NUMBER(sequence) \
0049 /**/
0050
0051 #endif /* BOOST_PP_VARIADICS */
0052 #endif /* BOOST_VMD_IS_NUMBER_HPP */