| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // constexpr V base() const& requires copy_constructible<V>; |
| // constexpr V base() &&; |
| |
| #include <ranges> |
| |
| #include <cassert> |
| #include <utility> |
| |
| #include "test_macros.h" |
| #include "types.h" |
| |
| constexpr bool hasLValueQualifiedBase(auto&& view) { |
| return requires { view.base(); }; |
| } |
| |
| constexpr bool test() { |
| int buf[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| |
| { |
| CopyableView view{buf, buf + 8}; |
| std::ranges::common_view<CopyableView> common(view); |
| assert(common.base().begin_ == buf); |
| assert(std::move(common).base().begin_ == buf); |
| |
| ASSERT_SAME_TYPE(decltype(common.base()), CopyableView); |
| ASSERT_SAME_TYPE(decltype(std::move(common).base()), CopyableView); |
| static_assert(hasLValueQualifiedBase(common)); |
| } |
| |
| { |
| MoveOnlyView view{buf, buf + 8}; |
| std::ranges::common_view<MoveOnlyView> common(std::move(view)); |
| assert(std::move(common).base().begin_ == buf); |
| |
| ASSERT_SAME_TYPE(decltype(std::move(common).base()), MoveOnlyView); |
| static_assert(!hasLValueQualifiedBase(common)); |
| } |
| |
| { |
| CopyableView view{buf, buf + 8}; |
| const std::ranges::common_view<CopyableView> common(view); |
| assert(common.base().begin_ == buf); |
| assert(std::move(common).base().begin_ == buf); |
| |
| ASSERT_SAME_TYPE(decltype(common.base()), CopyableView); |
| ASSERT_SAME_TYPE(decltype(std::move(common).base()), CopyableView); |
| static_assert(hasLValueQualifiedBase(common)); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |