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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
// constexpr take_view(V base, range_difference_t<V> count); // explicit since C++23
#include <cassert>
#include <ranges>
#include "test_convertible.h"
#include "test_iterators.h"
#include "test_macros.h"
#include "test_range.h"
#include "types.h"
// SFINAE tests.
#if TEST_STD_VER >= 23
static_assert(!test_convertible<std::ranges::take_view<View>, View, std::ranges::range_difference_t<View>>(),
"This constructor must be explicit");
#else
static_assert(test_convertible<std::ranges::take_view<View>, View, std::ranges::range_difference_t<View>>(),
"This constructor must be explicit");
#endif // TEST_STD_VER >= 23
constexpr bool test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
std::ranges::take_view<CopyableView> tv(CopyableView{buffer}, 0);
assert(tv.base().ptr_ == buffer);
assert(tv.begin() == tv.end()); // Checking we have correct size.
}
{
std::ranges::take_view<MoveOnlyView> tv(MoveOnlyView{buffer}, 1);
assert(std::move(tv).base().ptr_ == buffer);
assert(std::ranges::next(tv.begin(), 1) == tv.end()); // Checking we have correct size.
}
{
const std::ranges::take_view<CopyableView> tv(CopyableView{buffer}, 2);
assert(tv.base().ptr_ == buffer);
assert(std::ranges::next(tv.begin(), 2) == tv.end()); // Checking we have correct size.
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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