93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
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//===----------------------------------------------------------------------===//
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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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#ifndef LIBCXX_TEST_SUPPORT_TEST_RANGE_H
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#define LIBCXX_TEST_SUPPORT_TEST_RANGE_H
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#include <concepts>
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#include <iterator>
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#include <ranges>
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#include "test_iterators.h"
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#if TEST_STD_VER < 17
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# error "test/support/test_range.h" can only be included in builds supporting ranges
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#endif
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struct sentinel {
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bool operator==(std::input_or_output_iterator auto const&) const;
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};
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template <template <class...> class I, class T = int>
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requires std::input_or_output_iterator<I<T*> >
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struct test_range {
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I<T*> begin();
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I<T const*> begin() const;
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sentinel end();
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sentinel end() const;
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};
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template <template <class...> class I, class T = int>
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requires std::input_or_output_iterator<I<T*> >
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struct test_non_const_range {
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I<T*> begin();
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sentinel end();
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};
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template <template <class...> class I, class T = int>
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requires std::input_or_output_iterator<I<T*> >
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struct test_common_range {
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I<T*> begin();
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I<T const*> begin() const;
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I<T*> end();
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I<T const*> end() const;
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};
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template <template <class...> class I, class T = int>
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requires std::input_or_output_iterator<I<T*> >
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struct test_non_const_common_range {
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I<T*> begin();
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I<T*> end();
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};
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template <template <class...> class I, class T = int>
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requires std::input_or_output_iterator<I<T*> >
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struct test_view : std::ranges::view_base {
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I<T*> begin();
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I<T const*> begin() const;
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sentinel end();
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sentinel end() const;
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};
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template <class T = int>
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struct BorrowedRange {
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T* begin() const;
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T* end() const;
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BorrowedRange(BorrowedRange&&) = delete;
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};
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template <class T>
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inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange<T>> = true;
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static_assert(!std::ranges::view<BorrowedRange<>>);
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static_assert(std::ranges::borrowed_range<BorrowedRange<>>);
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using BorrowedView = std::ranges::empty_view<int>;
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static_assert(std::ranges::view<BorrowedView>);
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static_assert(std::ranges::borrowed_range<BorrowedView>);
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using NonBorrowedView = std::ranges::single_view<int>;
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static_assert(std::ranges::view<NonBorrowedView>);
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static_assert(!std::ranges::borrowed_range<NonBorrowedView>);
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template <class Range>
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concept simple_view =
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std::ranges::view<Range> && std::ranges::range<const Range> &&
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std::same_as<std::ranges::iterator_t<Range>, std::ranges::iterator_t<const Range>> &&
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std::same_as<std::ranges::sentinel_t<Range>, std::ranges::sentinel_t<const Range>>;
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#endif // LIBCXX_TEST_SUPPORT_TEST_RANGE_H
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