vmd/detail/is_identifier.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_DETAIL_IS_IDENTIFIER_HPP)
0008 #define BOOST_VMD_DETAIL_IS_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/tuple/elem.hpp>
0015 #include <boost/preprocessor/variadic/size.hpp>
0016 #include <boost/preprocessor/variadic/elem.hpp>
0017 #include <boost/vmd/identity.hpp>
0018 #include <boost/vmd/is_empty.hpp>
0019 #include <boost/vmd/is_tuple.hpp>
0020 #include <boost/vmd/detail/identifier.hpp>
0021 #include <boost/vmd/detail/identifier_concat.hpp>
0022 #include <boost/vmd/detail/not_empty.hpp>
0023
0024 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_MATCH(tup) \
0025     BOOST_VMD_DETAIL_NOT_EMPTY \
0026         ( \
0027         BOOST_PP_TUPLE_ELEM(0,tup) \
0028         ) \
0029 /**/
0030
0031 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_TUPLE(ptup) \
0032     BOOST_VMD_IDENTITY_RESULT \
0033         ( \
0034         BOOST_PP_IIF \
0035             ( \
0036             BOOST_VMD_IS_TUPLE(ptup), \
0037             BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_MATCH, \
0038             BOOST_VMD_IDENTITY(0) \
0039             ) \
0040         (ptup) \
0041         ) \
0042 /**/
0043
0044 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_ID(vseq) \
0045     BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_TUPLE \
0046         ( \
0047         BOOST_VMD_DETAIL_IDENTIFIER_CONCATENATE(vseq) \
0048         ) \
0049 /**/
0050
0051 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ(vseq) \
0052     BOOST_VMD_IDENTITY_RESULT \
0053         ( \
0054         BOOST_PP_IIF \
0055           ( \
0056           BOOST_PP_BITOR \
0057             ( \
0058             BOOST_VMD_IS_EMPTY(vseq), \
0059             BOOST_PP_IS_BEGIN_PARENS(vseq) \
0060             ), \
0061           BOOST_VMD_IDENTITY(0), \
0062           BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ_ID \
0063           ) \
0064         (vseq) \
0065         ) \
0066 /**/
0067
0068 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_SINGLE(...) \
0069     BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ(BOOST_PP_VARIADIC_ELEM(0,__VA_ARGS__)) \
0070 /**/
0071
0072 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_SINGLE_D(d,...) \
0073     BOOST_VMD_DETAIL_IS_IDENTIFIER_VSEQ(BOOST_PP_VARIADIC_ELEM(0,__VA_ARGS__)) \
0074 /**/
0075
0076 #define BOOST_VMD_DETAIL_IS_IDENTIFIER(...) \
0077     BOOST_PP_IIF \
0078         ( \
0079         BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__),1), \
0080         BOOST_VMD_DETAIL_IS_IDENTIFIER_SINGLE, \
0081         BOOST_VMD_DETAIL_IS_IDENTIFIER_MULTIPLE \
0082         ) \
0083     (__VA_ARGS__) \
0084 /**/
0085
0086 #define BOOST_VMD_DETAIL_IS_IDENTIFIER_D(d,...) \
0087     BOOST_PP_IIF \
0088         ( \
0089         BOOST_PP_EQUAL_D(d,BOOST_PP_VARIADIC_SIZE(__VA_ARGS__),1), \
0090         BOOST_VMD_DETAIL_IS_IDENTIFIER_SINGLE_D, \
0091         BOOST_VMD_DETAIL_IS_IDENTIFIER_MULTIPLE_D \
0092         ) \
0093     (d,__VA_ARGS__) \
0094 /**/
0095
0096 #endif /* BOOST_VMD_DETAIL_IS_IDENTIFIER_HPP */