67 lines
1.9 KiB
C++
67 lines
1.9 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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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// template<class R>
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// take_view(R&&, range_difference_t<R>) -> take_view<views::all_t<R>>;
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#include <ranges>
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#include <cassert>
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#include <concepts>
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struct View : std::ranges::view_base {
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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() 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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void testCTAD() {
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View v;
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Range r;
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BorrowedRange br;
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static_assert(std::same_as<
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decltype(std::ranges::take_view(v, 0)),
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std::ranges::take_view<View>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::take_view(std::move(v), 0)),
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std::ranges::take_view<View>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::take_view(r, 0)),
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std::ranges::take_view<std::ranges::ref_view<Range>>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::take_view(std::move(r), 0)),
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std::ranges::take_view<std::ranges::owning_view<Range>>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::take_view(br, 0)),
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std::ranges::take_view<std::ranges::ref_view<BorrowedRange>>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::take_view(std::move(br), 0)),
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std::ranges::take_view<std::ranges::owning_view<BorrowedRange>>
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>);
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}
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