| //===----------------------------------------------------------------------===// |
| // |
| // 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 drop_view(V base, range_difference_t<V> count); // explicit since C++23 |
| |
| #include <ranges> |
| |
| #include "test_convertible.h" |
| #include "test_macros.h" |
| #include "types.h" |
| |
| // SFINAE tests. |
| |
| #if TEST_STD_VER >= 23 |
| |
| static_assert(!test_convertible<std::ranges::drop_view<View>, View, std::ranges::range_difference_t<View>>(), |
| "This constructor must be explicit"); |
| |
| #else |
| |
| static_assert(test_convertible<std::ranges::drop_view<View>, View, std::ranges::range_difference_t<View>>(), |
| "This constructor must not be explicit"); |
| |
| #endif // TEST_STD_VER >= 23 |
| |
| constexpr bool test() { |
| std::ranges::drop_view dropView1(MoveOnlyView(), 4); |
| assert(dropView1.size() == 4); |
| assert(dropView1.begin() == globalBuff + 4); |
| |
| std::ranges::drop_view dropView2(ForwardView(), 4); |
| assert(base(dropView2.begin()) == globalBuff + 4); |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |