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74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
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// Boost.Range library
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//
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// Copyright Neil Groves 2014. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#define BOOST_RANGE_combined_exp_pred(d, data) BOOST_PP_TUPLE_ELEM(3, 0, data)
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#define BOOST_RANGE_combined_exp_op(d, data) \
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( \
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BOOST_PP_DEC( \
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BOOST_PP_TUPLE_ELEM(3, 0, data) \
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), \
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BOOST_PP_TUPLE_ELEM(3, 1, data), \
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BOOST_PP_MUL_D( \
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d, \
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BOOST_PP_TUPLE_ELEM(3, 2, data), \
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BOOST_PP_TUPLE_ELEM(3, 1, data) \
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) \
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)
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#define BOOST_RANGE_combined_exp(x, n) \
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BOOST_PP_TUPLE_ELEM(3, 2, \
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BOOST_PP_WHILE(BOOST_RANGE_combined_exp_pred, \
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BOOST_RANGE_combined_exp_op, (n, x, 1)))
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#define BOOST_RANGE_combined_bitset_pred(n, state) \
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BOOST_PP_TUPLE_ELEM(2,1,state)
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#define BOOST_RANGE_combined_bitset_op(d, state) \
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(BOOST_PP_DIV_D(d, BOOST_PP_TUPLE_ELEM(2,0,state), 2), \
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BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,1,state)))
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#define BOOST_RANGE_combined_bitset(i, n) \
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BOOST_PP_MOD(BOOST_PP_TUPLE_ELEM(2, 0, \
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BOOST_PP_WHILE(BOOST_RANGE_combined_bitset_pred, \
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BOOST_RANGE_combined_bitset_op, (i,n))), 2)
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#define BOOST_RANGE_combined_range_iterator(z, n, i) \
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typename range_iterator< \
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BOOST_PP_CAT(R,n) \
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BOOST_PP_IF( \
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BOOST_RANGE_combined_bitset(i,n), \
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BOOST_PP_IDENTITY(const), \
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BOOST_PP_EMPTY)() \
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>::type
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#define BOOST_RANGE_combined_args(z, n, i) \
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BOOST_PP_CAT(R, n) \
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BOOST_PP_IF(BOOST_RANGE_combined_bitset(i,n), const&, &) \
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BOOST_PP_CAT(r, n)
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#define BOOST_RANGE_combine_impl(z, i, n)\
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template<BOOST_PP_ENUM_PARAMS(n, typename R)> \
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inline range::combined_range< \
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boost::tuple<BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, i)> \
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> \
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combine(BOOST_PP_ENUM(n, BOOST_RANGE_combined_args, i)) \
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{ \
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typedef tuple< \
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BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, i) \
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> rng_tuple_t; \
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return range::combined_range<rng_tuple_t>( \
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rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, begin)), \
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rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, end))); \
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}
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#define BOOST_RANGE_combine(z, n, data) \
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BOOST_PP_REPEAT(BOOST_RANGE_combined_exp(2,n), BOOST_RANGE_combine_impl, n)
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