63 lines
2.0 KiB
C++
63 lines
2.0 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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// template<class T>
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// concept borrowed_range;
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#include <ranges>
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struct NotRange {
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int begin() const;
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int end() const;
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};
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struct Range {
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int *begin();
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int *end();
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};
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struct ConstRange {
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int *begin() const;
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int *end() const;
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};
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struct BorrowedRange {
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int *begin() const;
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int *end() const;
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};
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template<>
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inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true;
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static_assert(!std::ranges::borrowed_range<NotRange>);
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static_assert(!std::ranges::borrowed_range<NotRange&>);
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static_assert(!std::ranges::borrowed_range<const NotRange>);
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static_assert(!std::ranges::borrowed_range<const NotRange&>);
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static_assert(!std::ranges::borrowed_range<NotRange&&>);
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static_assert(!std::ranges::borrowed_range<Range>);
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static_assert( std::ranges::borrowed_range<Range&>);
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static_assert(!std::ranges::borrowed_range<const Range>);
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static_assert(!std::ranges::borrowed_range<const Range&>);
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static_assert(!std::ranges::borrowed_range<Range&&>);
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static_assert(!std::ranges::borrowed_range<ConstRange>);
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static_assert( std::ranges::borrowed_range<ConstRange&>);
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static_assert(!std::ranges::borrowed_range<const ConstRange>);
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static_assert( std::ranges::borrowed_range<const ConstRange&>);
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static_assert(!std::ranges::borrowed_range<ConstRange&&>);
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static_assert( std::ranges::borrowed_range<BorrowedRange>);
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static_assert( std::ranges::borrowed_range<BorrowedRange&>);
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static_assert( std::ranges::borrowed_range<const BorrowedRange>);
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static_assert( std::ranges::borrowed_range<const BorrowedRange&>);
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static_assert( std::ranges::borrowed_range<BorrowedRange&&>);
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