| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // template<class R> |
| // common_view(R&&) -> common_view<views::all_t<R>>; |
| |
| #include <ranges> |
| #include <cassert> |
| |
| #include "test_iterators.h" |
| |
| struct View : std::ranges::view_base { |
| int *begin() const; |
| sentinel_wrapper<int*> end() const; |
| }; |
| |
| struct Range { |
| int *begin() const; |
| sentinel_wrapper<int*> end() const; |
| }; |
| |
| struct BorrowedRange { |
| int *begin() const; |
| sentinel_wrapper<int*> end() const; |
| }; |
| template<> |
| inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true; |
| |
| void testCTAD() { |
| View v; |
| Range r; |
| BorrowedRange br; |
| static_assert(std::same_as< |
| decltype(std::ranges::common_view(v)), |
| std::ranges::common_view<View> |
| >); |
| static_assert(std::same_as< |
| decltype(std::ranges::common_view(r)), |
| std::ranges::common_view<std::ranges::ref_view<Range>> |
| >); |
| // std::ranges::common_view(std::move(r)) invalid. RValue range must be borrowed. |
| static_assert(std::same_as< |
| decltype(std::ranges::common_view(br)), |
| std::ranges::common_view<std::ranges::ref_view<BorrowedRange>> |
| >); |
| static_assert(std::same_as< |
| decltype(std::ranges::common_view(std::move(br))), |
| std::ranges::common_view<std::ranges::subrange< |
| int *, sentinel_wrapper<int *>, std::ranges::subrange_kind::unsized>> |
| >); |
| } |