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swap_ranges.hpp
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1
2// Range v3 library
3//
4// Copyright Eric Niebler 2013-present
5//
6// Use, modification and distribution is subject to the
7// Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// Project home: https://github.com/ericniebler/range-v3
12//
13#ifndef RANGES_V3_ALGORITHM_SWAP_RANGES_HPP
14#define RANGES_V3_ALGORITHM_SWAP_RANGES_HPP
15
17
18#include <range/v3/algorithm/result_types.hpp>
25#include <range/v3/utility/static_const.hpp>
26
27#include <range/v3/detail/prologue.hpp>
28
29namespace ranges
30{
33 template<typename I1, typename I2>
34 using swap_ranges_result = detail::in1_in2_result<I1, I2>;
35
36 RANGES_FUNC_BEGIN(swap_ranges)
37
38
39 template(typename I1, typename S1, typename I2)(
40 requires input_iterator<I1> AND sentinel_for<S1, I1> AND
42 constexpr swap_ranges_result<I1, I2> //
43 RANGES_FUNC(swap_ranges)(I1 begin1, S1 end1, I2 begin2) //
44 {
45 for(; begin1 != end1; ++begin1, ++begin2)
46 ranges::iter_swap(begin1, begin2);
47 return {begin1, begin2};
48 }
49
51 template(typename I1, typename S1, typename I2, typename S2)(
55 constexpr swap_ranges_result<I1, I2> RANGES_FUNC(swap_ranges)(I1 begin1,
56 S1 end1,
57 I2 begin2,
58 S2 end2) //
59 {
60 for(; begin1 != end1 && begin2 != end2; ++begin1, ++begin2)
61 ranges::iter_swap(begin1, begin2);
62 return {begin1, begin2};
63 }
64
65 template(typename Rng1, typename I2_)(
66 requires input_range<Rng1> AND input_iterator<uncvref_t<I2_>> AND
67 indirectly_swappable<iterator_t<Rng1>, uncvref_t<I2_>>)
68 constexpr swap_ranges_result<iterator_t<Rng1>, uncvref_t<I2_>> //
69 RANGES_FUNC(swap_ranges)(Rng1 && rng1, I2_ && begin2) //
70 {
71 return (*this)(begin(rng1), end(rng1), (I2_ &&) begin2);
72 }
73
74 template(typename Rng1, typename Rng2)(
75 requires input_range<Rng1> AND input_range<Rng2> AND
76 indirectly_swappable<iterator_t<Rng1>, iterator_t<Rng2>>)
77 constexpr swap_ranges_result<borrowed_iterator_t<Rng1>, borrowed_iterator_t<Rng2>> //
78 RANGES_FUNC(swap_ranges)(Rng1 && rng1, Rng2 && rng2) //
79 {
80 return (*this)(begin(rng1), end(rng1), begin(rng2), end(rng2));
81 }
82
83 RANGES_FUNC_END(swap_ranges)
84
85 namespace cpp20
86 {
87 using ranges::swap_ranges;
88 using ranges::swap_ranges_result;
89 } // namespace cpp20
91} // namespace ranges
92
93#include <range/v3/detail/epilogue.hpp>
94
95#endif
The indirectly_swappable concept.
The input_iterator concept.
The sentinel_for concept.