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-no-concepts
11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
12 
13 // constexpr V base() const& requires copy_constructible<V> { return base_; }
14 // constexpr V base() && { return std::move(base_); }
15 
16 #include <ranges>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 #include "types.h"
21 
22 constexpr bool test() {
23   int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
24 
25   // Test common ranges.
26   {
27     // Test non-const.
28     {
29       auto rev = std::ranges::reverse_view(BidirRange{buffer});
30       assert(rev.base().ptr_ == buffer);
31       assert(std::move(rev).base().ptr_ == buffer);
32 
33       ASSERT_SAME_TYPE(decltype(rev.base()), BidirRange);
34       ASSERT_SAME_TYPE(decltype(std::move(rev).base()), BidirRange);
35     }
36     // Test const.
37     {
38       const auto rev = std::ranges::reverse_view(BidirRange{buffer});
39       assert(rev.base().ptr_ == buffer);
40       assert(std::move(rev).base().ptr_ == buffer);
41 
42       ASSERT_SAME_TYPE(decltype(rev.base()), BidirRange);
43       ASSERT_SAME_TYPE(decltype(std::move(rev).base()), BidirRange);
44     }
45   }
46   // Test non-common ranges.
47   {
48     // Test non-const (also move only).
49     {
50       auto rev = std::ranges::reverse_view(BidirSentRange<MoveOnly>{buffer});
51       assert(std::move(rev).base().ptr_ == buffer);
52 
53       ASSERT_SAME_TYPE(decltype(std::move(rev).base()), BidirSentRange<MoveOnly>);
54     }
55     // Test const.
56     {
57       const auto rev = std::ranges::reverse_view(BidirSentRange<Copyable>{buffer});
58       assert(rev.base().ptr_ == buffer);
59       assert(std::move(rev).base().ptr_ == buffer);
60 
61       ASSERT_SAME_TYPE(decltype(rev.base()), BidirSentRange<Copyable>);
62       ASSERT_SAME_TYPE(decltype(std::move(rev).base()), BidirSentRange<Copyable>);
63     }
64   }
65 
66   return true;
67 }
68 
69 int main(int, char**) {
70   test();
71   static_assert(test());
72 
73   return 0;
74 }
75