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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
// template<class R>
// take_view(R&&, range_difference_t<R>) -> take_view<views::all_t<R>>;
#include <cassert>
#include <concepts>
#include <ranges>
#include <utility>
struct View : std::ranges::view_base {
int *begin() const;
int *end() const;
};
struct Range {
int *begin() const;
int *end() const;
};
struct BorrowedRange {
int *begin() const;
int *end() const;
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true;
void testCTAD() {
View v;
Range r;
BorrowedRange br;
static_assert(std::same_as<
decltype(std::ranges::take_view(v, 0)),
std::ranges::take_view<View>
>);
static_assert(std::same_as<
decltype(std::ranges::take_view(std::move(v), 0)),
std::ranges::take_view<View>
>);
static_assert(std::same_as<
decltype(std::ranges::take_view(r, 0)),
std::ranges::take_view<std::ranges::ref_view<Range>>
>);
static_assert(std::same_as<
decltype(std::ranges::take_view(std::move(r), 0)),
std::ranges::take_view<std::ranges::owning_view<Range>>
>);
static_assert(std::same_as<
decltype(std::ranges::take_view(br, 0)),
std::ranges::take_view<std::ranges::ref_view<BorrowedRange>>
>);
static_assert(std::same_as<
decltype(std::ranges::take_view(std::move(br), 0)),
std::ranges::take_view<std::ranges::owning_view<BorrowedRange>>
>);
}
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