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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: libcpp-has-no-incomplete-ranges
// constexpr V base() const& requires copy_constructible<V>;
// constexpr V base() &&;
#include <ranges>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "types.h"
constexpr bool hasLValueQualifiedBase(auto&& view) {
return requires { view.base(); };
}
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(std::move(tv).base().ptr_ == buffer);
ASSERT_SAME_TYPE(decltype(tv.base()), CopyableView);
ASSERT_SAME_TYPE(decltype(std::move(tv).base()), CopyableView);
static_assert(hasLValueQualifiedBase(tv));
}
{
std::ranges::take_view<MoveOnlyView> tv(MoveOnlyView{buffer}, 1);
assert(std::move(tv).base().ptr_ == buffer);
ASSERT_SAME_TYPE(decltype(std::move(tv).base()), MoveOnlyView);
static_assert(!hasLValueQualifiedBase(tv));
}
{
const std::ranges::take_view<CopyableView> tv(CopyableView{buffer}, 2);
assert(tv.base().ptr_ == buffer);
assert(std::move(tv).base().ptr_ == buffer);
ASSERT_SAME_TYPE(decltype(tv.base()), CopyableView);
ASSERT_SAME_TYPE(decltype(std::move(tv).base()), CopyableView);
static_assert(hasLValueQualifiedBase(tv));
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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