vmd/detail/sequence_to_tuple.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_SEQUENCE_TO_TUPLE_HPP)
0008 #define BOOST_VMD_DETAIL_SEQUENCE_TO_TUPLE_HPP
0009
0010 #include <boost/preprocessor/control/expr_iif.hpp>
0011 #include <boost/vmd/detail/modifiers.hpp>
0012 #include <boost/vmd/detail/mods.hpp>
0013 #include <boost/vmd/detail/not_empty.hpp>
0014 #include <boost/vmd/detail/sequence_elem.hpp>
0015
0016 #define BOOST_VMD_DETAIL_SEQUENCE_TO_TUPLE(...) \
0017     BOOST_PP_EXPR_IIF \
0018         ( \
0019         BOOST_VMD_DETAIL_NOT_EMPTY(BOOST_VMD_DETAIL_SEQUENCE_ELEM_GET_VSEQ(__VA_ARGS__)), \
0020         BOOST_VMD_DETAIL_SEQUENCE_ELEM_PROCESS_TUPLE \
0021             ( \
0022             BOOST_VMD_DETAIL_SEQUENCE_ELEM_GET_VSEQ(__VA_ARGS__), \
0023             , \
0024             BOOST_VMD_TYPE_TUPLE, \
0025             BOOST_VMD_DETAIL_NEW_MODS(BOOST_VMD_ALLOW_RETURN,__VA_ARGS__) \
0026             ) \
0027         ) \
0028 /**/
0029
0030 #define BOOST_VMD_DETAIL_SEQUENCE_TO_TUPLE_D(d,...) \
0031     BOOST_PP_EXPR_IIF \
0032         ( \
0033         BOOST_VMD_DETAIL_NOT_EMPTY(BOOST_VMD_DETAIL_SEQUENCE_ELEM_GET_VSEQ(__VA_ARGS__)), \
0034         BOOST_VMD_DETAIL_SEQUENCE_ELEM_PROCESS_TUPLE_D \
0035             ( \
0036             d, \
0037             BOOST_VMD_DETAIL_SEQUENCE_ELEM_GET_VSEQ(__VA_ARGS__), \
0038             , \
0039             BOOST_VMD_TYPE_TUPLE, \
0040             BOOST_VMD_DETAIL_NEW_MODS_D(d,BOOST_VMD_ALLOW_RETURN,__VA_ARGS__) \
0041             ) \
0042         ) \
0043 /**/
0044
0045 #endif /* BOOST_VMD_DETAIL_SEQUENCE_TO_TUPLE_HPP */