| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // constexpr explicit reverse_view(V r); |
| |
| #include <ranges> |
| |
| #include <cassert> |
| #include <type_traits> |
| #include <utility> |
| |
| #include "types.h" |
| |
| constexpr bool test() { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| |
| { |
| BidirRange r{buffer, buffer + 8}; |
| std::ranges::reverse_view<BidirRange> rev(r); |
| assert(rev.base().begin_ == buffer); |
| assert(rev.base().end_ == buffer + 8); |
| } |
| { |
| const BidirRange r{buffer, buffer + 8}; |
| const std::ranges::reverse_view<BidirRange> rev(r); |
| assert(rev.base().begin_ == buffer); |
| assert(rev.base().end_ == buffer + 8); |
| } |
| { |
| std::ranges::reverse_view<BidirSentRange<MoveOnly>> rev(BidirSentRange<MoveOnly>{buffer, buffer + 8}); |
| auto moved = std::move(rev).base(); |
| assert(moved.begin_ == buffer); |
| assert(moved.end_ == buffer + 8); |
| } |
| { |
| const std::ranges::reverse_view<BidirSentRange<Copyable>> rev(BidirSentRange<Copyable>{buffer, buffer + 8}); |
| assert(rev.base().begin_ == buffer); |
| assert(rev.base().end_ == buffer + 8); |
| } |
| { |
| // Make sure this ctor is marked as "explicit". |
| static_assert( std::is_constructible_v<std::ranges::reverse_view<BidirRange>, BidirRange>); |
| static_assert(!std::is_convertible_v<std::ranges::reverse_view<BidirRange>, BidirRange>); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |