1 // Boost.Range library 2 // 3 // Copyright Neil Groves 2014. Use, modification and 4 // distribution is subject to the Boost Software License, Version 5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at 6 // http://www.boost.org/LICENSE_1_0.txt) 7 // 8 // For more information, see http://www.boost.org/libs/range/ 9 // 10 #ifndef BOOST_RANGE_DETAIL_COMBINE_CXX03_HPP 11 #define BOOST_RANGE_DETAIL_COMBINE_CXX03_HPP 12 13 #ifndef BOOST_RANGE_MIN_COMBINE_ARGS 14 #define BOOST_RANGE_MIN_COMBINE_ARGS 2 15 #endif 16 17 #ifndef BOOST_RANGE_MAX_COMBINE_ARGS 18 #define BOOST_RANGE_MAX_COMBINE_ARGS 5 19 #endif 20 21 #include <boost/config.hpp> 22 #include <boost/iterator/zip_iterator.hpp> 23 #include <boost/preprocessor/arithmetic/dec.hpp> 24 #include <boost/preprocessor/arithmetic/div.hpp> 25 #include <boost/preprocessor/arithmetic/mul.hpp> 26 #include <boost/preprocessor/control.hpp> 27 #include <boost/preprocessor/control/while.hpp> 28 #include <boost/preprocessor/facilities/empty.hpp> 29 #include <boost/preprocessor/facilities/identity.hpp> 30 #include <boost/preprocessor/iteration/local.hpp> 31 #include <boost/preprocessor/punctuation/comma.hpp> 32 #include <boost/preprocessor/repetition.hpp> 33 #include <boost/preprocessor/tuple/elem.hpp> 34 #include <boost/range/iterator_range_core.hpp> 35 #include <boost/type_traits/remove_reference.hpp> 36 #include <boost/mpl/transform.hpp> 37 #include <boost/utility/result_of.hpp> 38 39 #include <vector> 40 #include <list> 41 42 namespace boost 43 { 44 namespace range_detail 45 { 46 47 template<typename F, typename T, int SIZE> 48 struct combined_result_impl; 49 50 template<typename F, typename T> 51 struct combined_result 52 : combined_result_impl<F, T, tuples::length<T>::value> 53 { 54 }; 55 56 #define BOOST_RANGE_combined_element(z, n, data) \ 57 typename tuples::element<n, T>::type 58 59 #define BOOST_RANGE_combined_result(z, n, data) \ 60 template<typename F, typename T> \ 61 struct combined_result_impl <F,T,n> \ 62 : result_of<F(BOOST_PP_ENUM(n, BOOST_RANGE_combined_element, ~))> \ 63 { \ 64 }; 65 66 #define BOOST_PP_LOCAL_MACRO(n) BOOST_RANGE_combined_result(~,n,~) 67 68 #define BOOST_PP_LOCAL_LIMITS (BOOST_RANGE_MIN_COMBINE_ARGS, \ 69 BOOST_RANGE_MAX_COMBINE_ARGS) 70 #include BOOST_PP_LOCAL_ITERATE() 71 72 #define BOOST_RANGE_combined_get(z, n, data) get<n>(tuple) 73 74 #define BOOST_RANGE_combined_unpack(z, n, data) \ 75 template<typename F, typename T> inline \ 76 typename combined_result<F,T>::type \ 77 unpack_(mpl::int_<n>, F f, const T& tuple) \ 78 { \ 79 return f(BOOST_PP_ENUM(n, BOOST_RANGE_combined_get, ~)); \ 80 } 81 82 #define BOOST_PP_LOCAL_MACRO(n) BOOST_RANGE_combined_unpack(~,n,~) 83 #define BOOST_PP_LOCAL_LIMITS (BOOST_RANGE_MIN_COMBINE_ARGS, \ 84 BOOST_RANGE_MAX_COMBINE_ARGS) 85 #include BOOST_PP_LOCAL_ITERATE() 86 87 } // namespace range_detail 88 89 namespace range 90 { 91 92 #define BOOST_RANGE_combined_seq(z, n, data) boost::data(BOOST_PP_CAT(r,n)) 93 94 #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES 95 96 #include <boost/range/detail/combine_no_rvalue.hpp> 97 98 #else // by using rvalue references we avoid requiring 2^n overloads. 99 100 #include <boost/range/detail/combine_rvalue.hpp> 101 102 #endif 103 104 #define BOOST_PP_LOCAL_MACRO(n) BOOST_RANGE_combine(~,n,~) 105 #define BOOST_PP_LOCAL_LIMITS (BOOST_RANGE_MIN_COMBINE_ARGS, \ 106 BOOST_RANGE_MAX_COMBINE_ARGS) 107 #include BOOST_PP_LOCAL_ITERATE() 108 109 } // namespace range 110 111 using boost::range::combine; 112 113 } // namespace boost 114 115 #endif // include guard 116 117 #undef BOOST_RANGE_combined_element 118 #undef BOOST_RANGE_combined_result 119 #undef BOOST_RANGE_combined_get 120 #undef BOOST_RANGE_combined_unpack 121 #undef BOOST_RANGE_combined_seq 122 #undef BOOST_RANGE_combined_exp_pred 123 #undef BOOST_RANGE_combined_exp_op 124 #undef BOOST_RANGE_combined_exp 125 #undef BOOST_RANGE_combined_bitset_pred 126 #undef BOOST_RANGE_combined_bitset_op 127 #undef BOOST_RANGE_combined_bitset 128 #undef BOOST_RANGE_combined_range_iterator 129 #undef BOOST_RANGE_combined_args 130 #undef BOOST_RANGE_combine_impl 131 #undef BOOST_RANGE_combine 132