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 // template<class R>
13 // reverse_view(R&&) -> reverse_view<views::all_t<R>>;
14
15 #include <ranges>
16
17 #include <concepts>
18 #include <utility>
19
20 #include "test_iterators.h"
21
22 struct View : std::ranges::view_base {
23 int *begin() const;
24 int *end() const;
25 };
26
27 struct Range {
28 int *begin() const;
29 int *end() const;
30 };
31
32 struct BorrowedRange {
33 int *begin() const;
34 int *end() const;
35 };
36 template<>
37 inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true;
38
testCTAD()39 void testCTAD() {
40 View v;
41 Range r;
42 BorrowedRange br;
43
44 static_assert(std::same_as<
45 decltype(std::ranges::reverse_view(v)),
46 std::ranges::reverse_view<View>
47 >);
48 static_assert(std::same_as<
49 decltype(std::ranges::reverse_view(std::move(v))),
50 std::ranges::reverse_view<View>
51 >);
52 static_assert(std::same_as<
53 decltype(std::ranges::reverse_view(r)),
54 std::ranges::reverse_view<std::ranges::ref_view<Range>>
55 >);
56 static_assert(std::same_as<
57 decltype(std::ranges::reverse_view(std::move(r))),
58 std::ranges::reverse_view<std::ranges::owning_view<Range>>
59 >);
60 static_assert(std::same_as<
61 decltype(std::ranges::reverse_view(br)),
62 std::ranges::reverse_view<std::ranges::ref_view<BorrowedRange>>
63 >);
64 static_assert(std::same_as<
65 decltype(std::ranges::reverse_view(std::move(br))),
66 std::ranges::reverse_view<std::ranges::owning_view<BorrowedRange>>
67 >);
68 }
69