6a66467499
- Partially implements P2770R0 (http://wg21.link/p2770) - Fixes https://wg21.link/LWG3698, https://wg21.link/LWG3700, and https://wg21.link/LWG3791 - join_with_view hasn't been done yet since this type isn't implemented yet - Rename tuple test directory to match the standard (which changed in P2770R0) - Rename join_view test directory to match the standard
83 lines
2.3 KiB
C++
83 lines
2.3 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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// template<class R>
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// explicit join_view(R&&) -> join_view<views::all_t<R>>;
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#include <ranges>
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#include <utility>
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struct Child {
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int *begin() const;
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int *end() const;
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};
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struct View : std::ranges::view_base {
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Child *begin() const;
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Child *end() const;
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};
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struct Range {
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Child *begin() const;
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Child *end() const;
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};
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struct BorrowedRange {
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Child *begin() const;
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Child *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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struct NestedChildren : std::ranges::view_base {
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View* begin() const;
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View* end() const;
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};
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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::join_view(v)),
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std::ranges::join_view<View>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::join_view(std::move(v))),
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std::ranges::join_view<View>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::join_view(r)),
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std::ranges::join_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::join_view(std::move(r))),
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std::ranges::join_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::join_view(br)),
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std::ranges::join_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::join_view(std::move(br))),
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std::ranges::join_view<std::ranges::owning_view<BorrowedRange>>
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>);
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NestedChildren n;
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std::ranges::join_view jv(n);
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// CTAD generated from the copy constructor instead of joining the join_view
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static_assert(std::same_as< decltype(std::ranges::join_view(jv)), decltype(jv) >);
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// CTAD generated from the move constructor instead of joining the join_view
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static_assert(std::same_as< decltype(std::ranges::join_view(std::move(jv))), decltype(jv) >);
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}
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