1 2 // (C) Copyright Edward Diener 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_VMD_TUPLE_HPP) 8 #define BOOST_VMD_IS_VMD_TUPLE_HPP 9 10 #include <boost/vmd/detail/setup.hpp> 11 12 #if BOOST_PP_VARIADICS 13 14 #include <boost/preprocessor/control/iif.hpp> 15 #include <boost/vmd/identity.hpp> 16 #include <boost/vmd/is_empty.hpp> 17 #include <boost/vmd/is_tuple.hpp> 18 19 /* 20 21 The succeeding comments in this file are in doxygen format. 22 23 */ 24 25 /** \file 26 */ 27 28 /** \def BOOST_VMD_IS_VMD_TUPLE(sequence) 29 30 \brief Determines if a sequence is a VMD tuple. 31 32 The macro checks that the sequence is a VMD tuple. 33 A VMD tuple, which may be a Boost PP tuple or emptiness, is a superset of a Boost PP tuple. 34 It returns 1 if it is a VMD tuple, else if returns 0. 35 36 sequence = a possible Boost PP tuple 37 38 returns = 1 if it a VMD tuple, else returns 0. 39 40 */ 41 42 #define BOOST_VMD_IS_VMD_TUPLE(sequence) \ 43 BOOST_VMD_IDENTITY_RESULT \ 44 ( \ 45 BOOST_PP_IIF \ 46 ( \ 47 BOOST_VMD_IS_EMPTY(sequence), \ 48 BOOST_VMD_IDENTITY(1), \ 49 BOOST_VMD_IS_TUPLE \ 50 ) \ 51 (sequence) \ 52 ) \ 53 /**/ 54 55 #endif /* BOOST_PP_VARIADICS */ 56 #endif /* BOOST_VMD_IS_VMD_TUPLE_HPP */ 57