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