64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// UNSUPPORTED: libcpp-no-concepts
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// constexpr explicit reverse_view(V r);
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#include <ranges>
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#include <cassert>
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#include <type_traits>
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#include <utility>
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#include "types.h"
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constexpr bool test() {
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int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
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{
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BidirRange r{buffer, buffer + 8};
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std::ranges::reverse_view<BidirRange> rev(r);
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assert(rev.base().begin_ == buffer);
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assert(rev.base().end_ == buffer + 8);
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}
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{
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const BidirRange r{buffer, buffer + 8};
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const std::ranges::reverse_view<BidirRange> rev(r);
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assert(rev.base().begin_ == buffer);
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assert(rev.base().end_ == buffer + 8);
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}
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{
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std::ranges::reverse_view<BidirSentRange<MoveOnly>> rev(BidirSentRange<MoveOnly>{buffer, buffer + 8});
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auto moved = std::move(rev).base();
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assert(moved.begin_ == buffer);
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assert(moved.end_ == buffer + 8);
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}
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{
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const std::ranges::reverse_view<BidirSentRange<Copyable>> rev(BidirSentRange<Copyable>{buffer, buffer + 8});
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assert(rev.base().begin_ == buffer);
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assert(rev.base().end_ == buffer + 8);
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}
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{
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// Make sure this ctor is marked as "explicit".
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static_assert( std::is_constructible_v<std::ranges::reverse_view<BidirRange>, BidirRange>);
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static_assert(!std::is_convertible_v<std::ranges::reverse_view<BidirRange>, BidirRange>);
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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