69 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// constexpr reverse_iterator<iterator_t<V>> end();12// constexpr auto end() const requires common_range<const V>;13 14#include <ranges>15 16#include <cassert>17#include <utility>18 19#include "test_macros.h"20#include "types.h"21 22constexpr bool test() {23 int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};24 25 // Common bidirectional range.26 {27 auto rev = std::ranges::reverse_view(BidirRange{buffer, buffer + 8});28 assert(base(rev.end().base()) == buffer);29 assert(base(std::move(rev).end().base()) == buffer);30 31 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<int*>>);32 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);33 }34 // Const common bidirectional range.35 {36 const auto rev = std::ranges::reverse_view(BidirRange{buffer, buffer + 8});37 assert(base(rev.end().base()) == buffer);38 assert(base(std::move(rev).end().base()) == buffer);39 40 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<const int*>>);41 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<const int*>>);42 }43 // Non-common, non-const (move only) bidirectional range.44 {45 auto rev = std::ranges::reverse_view(BidirSentRange<MoveOnly>{buffer, buffer + 8});46 assert(base(std::move(rev).end().base()) == buffer);47 48 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);49 }50 // Non-common, const bidirectional range.51 {52 auto rev = std::ranges::reverse_view(BidirSentRange<Copyable>{buffer, buffer + 8});53 assert(base(rev.end().base()) == buffer);54 assert(base(std::move(rev).end().base()) == buffer);55 56 ASSERT_SAME_TYPE(decltype(rev.end()), std::reverse_iterator<bidirectional_iterator<int*>>);57 ASSERT_SAME_TYPE(decltype(std::move(rev).end()), std::reverse_iterator<bidirectional_iterator<int*>>);58 }59 60 return true;61}62 63int main(int, char**) {64 test();65 static_assert(test());66 67 return 0;68}69