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
11 // constexpr sentinel<false> end();
12 // constexpr iterator<false> end() requires common_range<V>;
13 // constexpr sentinel<true> end() const
14 // requires range<const V> &&
15 // regular_invocable<const F&, range_reference_t<const V>>;
16 // constexpr iterator<true> end() const
17 // requires common_range<const V> &&
18 // regular_invocable<const F&, range_reference_t<const V>>;
19
20 #include <ranges>
21
22 #include "test_macros.h"
23 #include "types.h"
24
25 template<class T>
26 concept HasConstQualifiedEnd = requires(const T& t) { t.end(); };
27
test()28 constexpr bool test() {
29 {
30 using TransformView = std::ranges::transform_view<ForwardView, PlusOneMutable>;
31 static_assert(std::ranges::common_range<TransformView>);
32 TransformView tv;
33 auto it = tv.end();
34 using It = decltype(it);
35 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), const forward_iterator<int*>&);
36 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), forward_iterator<int*>);
37 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), const forward_iterator<int*>&);
38 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), const forward_iterator<int*>&);
39 assert(base(it.base()) == globalBuff + 8);
40 assert(base(std::move(it).base()) == globalBuff + 8);
41 static_assert(!HasConstQualifiedEnd<TransformView>);
42 }
43 {
44 using TransformView = std::ranges::transform_view<InputView, PlusOneMutable>;
45 static_assert(!std::ranges::common_range<TransformView>);
46 TransformView tv;
47 auto sent = tv.end();
48 using Sent = decltype(sent);
49 ASSERT_SAME_TYPE(decltype(static_cast<Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
50 ASSERT_SAME_TYPE(decltype(static_cast<Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
51 ASSERT_SAME_TYPE(decltype(static_cast<const Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
52 ASSERT_SAME_TYPE(decltype(static_cast<const Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
53 assert(base(base(sent.base())) == globalBuff + 8);
54 assert(base(base(std::move(sent).base())) == globalBuff + 8);
55 static_assert(!HasConstQualifiedEnd<TransformView>);
56 }
57 {
58 using TransformView = std::ranges::transform_view<InputView, PlusOne>;
59 static_assert(!std::ranges::common_range<TransformView>);
60 TransformView tv;
61 auto sent = tv.end();
62 using Sent = decltype(sent);
63 ASSERT_SAME_TYPE(decltype(static_cast<Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
64 ASSERT_SAME_TYPE(decltype(static_cast<Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
65 ASSERT_SAME_TYPE(decltype(static_cast<const Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
66 ASSERT_SAME_TYPE(decltype(static_cast<const Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
67 assert(base(base(sent.base())) == globalBuff + 8);
68 assert(base(base(std::move(sent).base())) == globalBuff + 8);
69
70 auto csent = std::as_const(tv).end();
71 using CSent = decltype(csent);
72 ASSERT_SAME_TYPE(decltype(static_cast<CSent&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
73 ASSERT_SAME_TYPE(decltype(static_cast<CSent&&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
74 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
75 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
76 assert(base(base(csent.base())) == globalBuff + 8);
77 assert(base(base(std::move(csent).base())) == globalBuff + 8);
78 }
79 {
80 using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOneMutable>;
81 static_assert(std::ranges::common_range<TransformView>);
82 TransformView tv;
83 auto it = tv.end();
84 using It = decltype(it);
85 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), int* const&);
86 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), int*);
87 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), int* const&);
88 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), int* const&);
89 assert(base(it.base()) == globalBuff + 8);
90 assert(base(std::move(it).base()) == globalBuff + 8);
91 static_assert(!HasConstQualifiedEnd<TransformView>);
92 }
93 {
94 using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOne>;
95 static_assert(std::ranges::common_range<TransformView>);
96 TransformView tv;
97 auto it = tv.end();
98 using It = decltype(it);
99 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), int* const&);
100 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), int*);
101 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), int* const&);
102 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), int* const&);
103 assert(base(it.base()) == globalBuff + 8);
104 assert(base(std::move(it).base()) == globalBuff + 8);
105
106 auto csent = std::as_const(tv).end();
107 using CSent = decltype(csent);
108 ASSERT_SAME_TYPE(decltype(static_cast<CSent&>(csent).base()), int* const&);
109 ASSERT_SAME_TYPE(decltype(static_cast<CSent&&>(csent).base()), int*);
110 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&>(csent).base()), int* const&);
111 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&&>(csent).base()), int* const&);
112 assert(base(base(csent.base())) == globalBuff + 8);
113 assert(base(base(std::move(csent).base())) == globalBuff + 8);
114 }
115 return true;
116 }
117
main(int,char **)118 int main(int, char**) {
119 test();
120 static_assert(test());
121
122 return 0;
123 }
124