1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
11
12 // constexpr reverse_iterator<iterator_t<V>> end();
13 // constexpr auto end() const requires common_range<const V>;
14
15 #include <ranges>
16
17 #include <cassert>
18 #include <utility>
19
20 #include "test_macros.h"
21 #include "types.h"
22
test()23 constexpr bool test() {
24 int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
25
26 // Common bidirectional range.
27 {
28 auto rev = std::ranges::reverse_view(BidirRange{buffer, buffer + 8});
29 assert(base(rev.end().base()) == buffer);
30 assert(base(std::move(rev).end().base()) == buffer);
31
32 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<int*>>);
33 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);
34 }
35 // Const common bidirectional range.
36 {
37 const auto rev = std::ranges::reverse_view(BidirRange{buffer, buffer + 8});
38 assert(base(rev.end().base()) == buffer);
39 assert(base(std::move(rev).end().base()) == buffer);
40
41 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<const int*>>);
42 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<const int*>>);
43 }
44 // Non-common, non-const (move only) bidirectional range.
45 {
46 auto rev = std::ranges::reverse_view(BidirSentRange<MoveOnly>{buffer, buffer + 8});
47 assert(base(std::move(rev).end().base()) == buffer);
48
49 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);
50 }
51 // Non-common, const bidirectional range.
52 {
53 auto rev = std::ranges::reverse_view(BidirSentRange<Copyable>{buffer, buffer + 8});
54 assert(base(rev.end().base()) == buffer);
55 assert(base(std::move(rev).end().base()) == buffer);
56
57 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<int*>>);
58 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);
59 }
60
61 return true;
62 }
63
main(int,char **)64 int main(int, char**) {
65 test();
66 static_assert(test());
67
68 return 0;
69 }
70