range/detail/combine_rvalue.hpp

0001 // Boost.Range library
0002 //
0003 //  Copyright Neil Groves 2014. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/range/
0009 //
0010 #define BOOST_RANGE_combined_args(z, n, i) \
0011     BOOST_PP_CAT(R, n)&& BOOST_PP_CAT(r, n)
0012
0013 #define BOOST_RANGE_combined_range_iterator(z, n, i) \
0014     typename range_iterator< \
0015         typename remove_reference<BOOST_PP_CAT(R,n)>::type \
0016   >::type
0017
0018
0019 #define BOOST_RANGE_combine(z, n, data) \
0020     template <BOOST_PP_ENUM_PARAMS(n, typename R)> \
0021     inline range::combined_range< \
0022         tuple<BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, ~)> \
0023     > \
0024     combine(BOOST_PP_ENUM(n, BOOST_RANGE_combined_args, ~)) \
0025     { \
0026         typedef tuple< \
0027             BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, ~) \
0028         > rng_tuple_t; \
0029         return range::combined_range<rng_tuple_t>( \
0030             rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, begin)), \
0031             rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, end))); \
0032     }