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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
// Test that views that use __movable_box do not overwrite overlapping subobjects.
// https://github.com/llvm/llvm-project/issues/70506
#include <cassert>
#include <ranges>
#include "test_macros.h"
struct Pred {
alignas(128) bool a{};
Pred() noexcept = default;
Pred(const Pred&) noexcept = default;
Pred(Pred&&) noexcept = default;
Pred& operator=(const Pred&) = delete;
Pred& operator=(Pred&&) = delete;
constexpr bool operator()(const auto&...) const { return true; }
};
struct View : std::ranges::view_base {
constexpr int* begin() const { return nullptr; }
constexpr int* end() const { return nullptr; }
};
template <class View>
struct S {
[[no_unique_address]] View view{};
char c = 42;
};
template <class View>
constexpr void testOne() {
S<View> s1;
assert(s1.c == 42);
s1.view = View{};
assert(s1.c == 42);
}
constexpr bool test() {
testOne<std::ranges::transform_view<View, Pred>>();
testOne<std::ranges::filter_view<View, Pred>>();
testOne<std::ranges::drop_while_view<View, Pred>>();
testOne<std::ranges::take_while_view<View, Pred>>();
testOne<std::ranges::single_view<Pred>>();
#if TEST_STD_VER >= 23
testOne<std::ranges::chunk_by_view<View, Pred>>();
testOne<std::ranges::repeat_view<Pred>>();
#endif
return true;
}
int main(int, char**) {
static_assert(test());
test();
return 0;
}
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