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 explicit reverse_view(V r);
14
15 #include <ranges>
16
17 #include <cassert>
18 #include <type_traits>
19 #include <utility>
20
21 #include "types.h"
22
test()23 constexpr bool test() {
24 int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
25
26 {
27 BidirRange r{buffer, buffer + 8};
28 std::ranges::reverse_view<BidirRange> rev(r);
29 assert(rev.base().begin_ == buffer);
30 assert(rev.base().end_ == buffer + 8);
31 }
32 {
33 const BidirRange r{buffer, buffer + 8};
34 const std::ranges::reverse_view<BidirRange> rev(r);
35 assert(rev.base().begin_ == buffer);
36 assert(rev.base().end_ == buffer + 8);
37 }
38 {
39 std::ranges::reverse_view<BidirSentRange<MoveOnly>> rev(BidirSentRange<MoveOnly>{buffer, buffer + 8});
40 auto moved = std::move(rev).base();
41 assert(moved.begin_ == buffer);
42 assert(moved.end_ == buffer + 8);
43 }
44 {
45 const std::ranges::reverse_view<BidirSentRange<Copyable>> rev(BidirSentRange<Copyable>{buffer, buffer + 8});
46 assert(rev.base().begin_ == buffer);
47 assert(rev.base().end_ == buffer + 8);
48 }
49 {
50 // Make sure this ctor is marked as "explicit".
51 static_assert( std::is_constructible_v<std::ranges::reverse_view<BidirRange>, BidirRange>);
52 static_assert(!std::is_convertible_v<std::ranges::reverse_view<BidirRange>, BidirRange>);
53 }
54
55 return true;
56 }
57
main(int,char **)58 int main(int, char**) {
59 test();
60 static_assert(test());
61
62 return 0;
63 }
64