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 sentinel<false> end();
13 // constexpr iterator<false> end() requires common_range<V>;
14 // constexpr sentinel<true> end() const
15 // requires range<const V> &&
16 // regular_invocable<const F&, range_reference_t<const V>>;
17 // constexpr iterator<true> end() const
18 // requires common_range<const V> &&
19 // regular_invocable<const F&, range_reference_t<const V>>;
20
21 #include <ranges>
22
23 #include "test_macros.h"
24 #include "types.h"
25
26 template<class T>
27 concept HasConstQualifiedEnd = requires(const T& t) { t.end(); };
28
test()29 constexpr bool test() {
30 {
31 using TransformView = std::ranges::transform_view<ForwardView, PlusOneMutable>;
32 static_assert(std::ranges::common_range<TransformView>);
33 TransformView tv;
34 auto it = tv.end();
35 using It = decltype(it);
36 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), const forward_iterator<int*>&);
37 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), forward_iterator<int*>);
38 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), const forward_iterator<int*>&);
39 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), const forward_iterator<int*>&);
40 assert(base(it.base()) == globalBuff + 8);
41 assert(base(std::move(it).base()) == globalBuff + 8);
42 static_assert(!HasConstQualifiedEnd<TransformView>);
43 }
44 {
45 using TransformView = std::ranges::transform_view<InputView, PlusOneMutable>;
46 static_assert(!std::ranges::common_range<TransformView>);
47 TransformView tv;
48 auto sent = tv.end();
49 using Sent = decltype(sent);
50 ASSERT_SAME_TYPE(decltype(static_cast<Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
51 ASSERT_SAME_TYPE(decltype(static_cast<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_SAME_TYPE(decltype(static_cast<const Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
54 assert(base(base(sent.base())) == globalBuff + 8);
55 assert(base(base(std::move(sent).base())) == globalBuff + 8);
56 static_assert(!HasConstQualifiedEnd<TransformView>);
57 }
58 {
59 using TransformView = std::ranges::transform_view<InputView, PlusOne>;
60 static_assert(!std::ranges::common_range<TransformView>);
61 TransformView tv;
62 auto sent = tv.end();
63 using Sent = decltype(sent);
64 ASSERT_SAME_TYPE(decltype(static_cast<Sent&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
65 ASSERT_SAME_TYPE(decltype(static_cast<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_SAME_TYPE(decltype(static_cast<const Sent&&>(sent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
68 assert(base(base(sent.base())) == globalBuff + 8);
69 assert(base(base(std::move(sent).base())) == globalBuff + 8);
70
71 auto csent = std::as_const(tv).end();
72 using CSent = decltype(csent);
73 ASSERT_SAME_TYPE(decltype(static_cast<CSent&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
74 ASSERT_SAME_TYPE(decltype(static_cast<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_SAME_TYPE(decltype(static_cast<const CSent&&>(csent).base()), sentinel_wrapper<cpp20_input_iterator<int*>>);
77 assert(base(base(csent.base())) == globalBuff + 8);
78 assert(base(base(std::move(csent).base())) == globalBuff + 8);
79 }
80 {
81 using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOneMutable>;
82 static_assert(std::ranges::common_range<TransformView>);
83 TransformView tv;
84 auto it = tv.end();
85 using It = decltype(it);
86 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), int* const&);
87 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), int*);
88 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), int* const&);
89 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), int* const&);
90 assert(base(it.base()) == globalBuff + 8);
91 assert(base(std::move(it).base()) == globalBuff + 8);
92 static_assert(!HasConstQualifiedEnd<TransformView>);
93 }
94 {
95 using TransformView = std::ranges::transform_view<MoveOnlyView, PlusOne>;
96 static_assert(std::ranges::common_range<TransformView>);
97 TransformView tv;
98 auto it = tv.end();
99 using It = decltype(it);
100 ASSERT_SAME_TYPE(decltype(static_cast<It&>(it).base()), int* const&);
101 ASSERT_SAME_TYPE(decltype(static_cast<It&&>(it).base()), int*);
102 ASSERT_SAME_TYPE(decltype(static_cast<const It&>(it).base()), int* const&);
103 ASSERT_SAME_TYPE(decltype(static_cast<const It&&>(it).base()), int* const&);
104 assert(base(it.base()) == globalBuff + 8);
105 assert(base(std::move(it).base()) == globalBuff + 8);
106
107 auto csent = std::as_const(tv).end();
108 using CSent = decltype(csent);
109 ASSERT_SAME_TYPE(decltype(static_cast<CSent&>(csent).base()), int* const&);
110 ASSERT_SAME_TYPE(decltype(static_cast<CSent&&>(csent).base()), int*);
111 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&>(csent).base()), int* const&);
112 ASSERT_SAME_TYPE(decltype(static_cast<const CSent&&>(csent).base()), int* const&);
113 assert(base(base(csent.base())) == globalBuff + 8);
114 assert(base(base(std::move(csent).base())) == globalBuff + 8);
115 }
116 return true;
117 }
118
main(int,char **)119 int main(int, char**) {
120 test();
121 static_assert(test());
122
123 return 0;
124 }
125