vmd/detail/is_general_identifier.hpp

0001
0002 //  (C) Copyright Edward Diener 2020
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_DETAIL_IS_GENERAL_IDENTIFIER_HPP)
0008 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_HPP
0009
0010 #include <boost/preprocessor/comparison/equal.hpp>
0011 #include <boost/preprocessor/control/iif.hpp>
0012 #include <boost/preprocessor/logical/bitor.hpp>
0013 #include <boost/preprocessor/punctuation/is_begin_parens.hpp>
0014 #include <boost/preprocessor/variadic/size.hpp>
0015 #include <boost/preprocessor/variadic/elem.hpp>
0016 #include <boost/vmd/identity.hpp>
0017 #include <boost/vmd/is_empty.hpp>
0018 #include <boost/vmd/detail/identifier_concat.hpp>
0019
0020 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ_RESULT(ignored) \
0021     BOOST_VMD_IDENTITY_RESULT \
0022         ( \
0023         BOOST_VMD_IDENTITY(1)(ignored) \
0024         ) \
0025 /**/
0026
0027 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ_ID(vseq) \
0028     BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ_RESULT(BOOST_VMD_DETAIL_IDENTIFIER_CONCATENATE(vseq)) \
0029 /**/
0030
0031 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ(vseq) \
0032     BOOST_VMD_IDENTITY_RESULT \
0033         ( \
0034         BOOST_PP_IIF \
0035           ( \
0036           BOOST_PP_BITOR \
0037             ( \
0038             BOOST_VMD_IS_EMPTY(vseq), \
0039             BOOST_PP_IS_BEGIN_PARENS(vseq) \
0040             ), \
0041           BOOST_VMD_IDENTITY(0), \
0042           BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ_ID \
0043           ) \
0044         (vseq) \
0045         ) \
0046 /**/
0047
0048 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_SINGLE(...) \
0049     BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_VSEQ(BOOST_PP_VARIADIC_ELEM(0,__VA_ARGS__)) \
0050 /**/
0051
0052 #define BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER(...) \
0053     BOOST_VMD_IDENTITY_RESULT \
0054         ( \
0055         BOOST_PP_IIF \
0056             ( \
0057             BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__),1), \
0058             BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_SINGLE, \
0059             BOOST_VMD_IDENTITY(0) \
0060             ) \
0061         (__VA_ARGS__) \
0062         ) \
0063 /**/
0064
0065 #endif /* BOOST_VMD_DETAIL_IS_GENERAL_IDENTIFIER_HPP */