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//===----------------------------------------------------------------------===//
//
// 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: !c++experimental
// template<class R>
// explicit join_view(R&&) -> join_view<views::all_t<R>>;
#include <ranges>
#include <utility>
struct Child {
int *begin() const;
int *end() const;
};
struct View : std::ranges::view_base {
Child *begin() const;
Child *end() const;
};
struct Range {
Child *begin() const;
Child *end() const;
};
struct BorrowedRange {
Child *begin() const;
Child *end() const;
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true;
struct NestedChildren : std::ranges::view_base {
View* begin() const;
View* end() const;
};
void testCTAD() {
View v;
Range r;
BorrowedRange br;
static_assert(std::same_as<
decltype(std::ranges::join_view(v)),
std::ranges::join_view<View>
>);
static_assert(std::same_as<
decltype(std::ranges::join_view(std::move(v))),
std::ranges::join_view<View>
>);
static_assert(std::same_as<
decltype(std::ranges::join_view(r)),
std::ranges::join_view<std::ranges::ref_view<Range>>
>);
static_assert(std::same_as<
decltype(std::ranges::join_view(std::move(r))),
std::ranges::join_view<std::ranges::owning_view<Range>>
>);
static_assert(std::same_as<
decltype(std::ranges::join_view(br)),
std::ranges::join_view<std::ranges::ref_view<BorrowedRange>>
>);
static_assert(std::same_as<
decltype(std::ranges::join_view(std::move(br))),
std::ranges::join_view<std::ranges::owning_view<BorrowedRange>>
>);
NestedChildren n;
std::ranges::join_view jv(n);
// CTAD generated from the copy constructor instead of joining the join_view
static_assert(std::same_as< decltype(std::ranges::join_view(jv)), decltype(jv) >);
// CTAD generated from the move constructor instead of joining the join_view
static_assert(std::same_as< decltype(std::ranges::join_view(std::move(jv))), decltype(jv) >);
}
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