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
42namespace boost
43{
44 namespace range_detail
45 {
46
47template<typename F, typename T, int SIZE>
48struct combined_result_impl;
49
50template<typename F, typename T>
51struct 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
89namespace 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