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_DETAIL_SEQUENCE_ARITY_HPP) 8 #define BOOST_VMD_DETAIL_SEQUENCE_ARITY_HPP 9 10 #include <boost/preprocessor/logical/bitand.hpp> 11 #include <boost/preprocessor/logical/bitnor.hpp> 12 #include <boost/preprocessor/tuple/elem.hpp> 13 #include <boost/vmd/is_empty.hpp> 14 #include <boost/vmd/detail/modifiers.hpp> 15 #include <boost/vmd/detail/not_empty.hpp> 16 #include <boost/vmd/detail/sequence_elem.hpp> 17 18 #define BOOST_VMD_DETAIL_IS_MULTI_TUPLE(tuple) \ 19 BOOST_PP_BITNOR \ 20 ( \ 21 BOOST_VMD_IS_EMPTY(BOOST_PP_TUPLE_ELEM(0,tuple)), \ 22 BOOST_VMD_IS_EMPTY(BOOST_PP_TUPLE_ELEM(1,tuple)) \ 23 ) \ 24 /**/ 25 26 #define BOOST_VMD_DETAIL_IS_UNARY_TUPLE(tuple) \ 27 BOOST_PP_BITAND \ 28 ( \ 29 BOOST_VMD_DETAIL_NOT_EMPTY(BOOST_PP_TUPLE_ELEM(0,tuple)), \ 30 BOOST_VMD_IS_EMPTY(BOOST_PP_TUPLE_ELEM(1,tuple)) \ 31 ) \ 32 /**/ 33 34 // UNARY 35 36 #define BOOST_VMD_DETAIL_IS_UNARY(vseq) \ 37 BOOST_VMD_DETAIL_IS_UNARY_TUPLE \ 38 ( \ 39 BOOST_VMD_DETAIL_SEQUENCE_ELEM(BOOST_VMD_ALLOW_AFTER,0,vseq,BOOST_VMD_RETURN_AFTER) \ 40 ) \ 41 /**/ 42 43 #define BOOST_VMD_DETAIL_IS_UNARY_D(d,vseq) \ 44 BOOST_VMD_DETAIL_IS_UNARY_TUPLE \ 45 ( \ 46 BOOST_VMD_DETAIL_SEQUENCE_ELEM_D(d,BOOST_VMD_ALLOW_AFTER,0,vseq,BOOST_VMD_RETURN_AFTER) \ 47 ) \ 48 /**/ 49 50 // MULTI 51 52 #define BOOST_VMD_DETAIL_IS_MULTI(vseq) \ 53 BOOST_VMD_DETAIL_IS_MULTI_TUPLE \ 54 ( \ 55 BOOST_VMD_DETAIL_SEQUENCE_ELEM(BOOST_VMD_ALLOW_AFTER,0,vseq,BOOST_VMD_RETURN_AFTER) \ 56 ) \ 57 /**/ 58 59 #define BOOST_VMD_DETAIL_IS_MULTI_D(d,vseq) \ 60 BOOST_VMD_DETAIL_IS_MULTI_TUPLE \ 61 ( \ 62 BOOST_VMD_DETAIL_SEQUENCE_ELEM_D(d,BOOST_VMD_ALLOW_AFTER,0,vseq,BOOST_VMD_RETURN_AFTER) \ 63 ) \ 64 /**/ 65 66 #endif /* BOOST_VMD_DETAIL_SEQUENCE_ARITY_HPP */ 67