//===----------------------------------------------------------------------===//
//
// 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
// <optional>

// T shall be an object type other than cv in_place_t or cv nullopt_t
//   and shall satisfy the Cpp17Destructible requirements.
// Note: array types do not satisfy the Cpp17Destructible requirements.

#include <optional>
#include <type_traits>
#include <cassert>

#include "test_macros.h"

struct NonDestructible { ~NonDestructible() = delete; };

int main(int, char**)
{
    {
    std::optional<char &> o1;          // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with a reference type is ill-formed}}
#ifdef TEST_COMPILER_CLANG
        // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with a non-object type is undefined behavior}}
#endif // TEST_COMPILER_CLANG
    std::optional<NonDestructible> o2; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with a non-destructible type is ill-formed}}
    std::optional<char[20]> o3;        // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with an array type is ill-formed}}
    }

    {
    std::optional<               std::in_place_t> o1; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with in_place_t is ill-formed}}
    std::optional<const          std::in_place_t> o2; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with in_place_t is ill-formed}}
    std::optional<      volatile std::in_place_t> o3; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with in_place_t is ill-formed}}
    std::optional<const volatile std::in_place_t> o4; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with in_place_t is ill-formed}}
    }

    {
    std::optional<               std::nullopt_t> o1; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with nullopt_t is ill-formed}}
    std::optional<const          std::nullopt_t> o2; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with nullopt_t is ill-formed}}
    std::optional<      volatile std::nullopt_t> o3; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with nullopt_t is ill-formed}}
    std::optional<const volatile std::nullopt_t> o4; // expected-error-re@optional:* {{{{(static_assert|static assertion)}} failed{{.*}}instantiation of optional with nullopt_t is ill-formed}}
    }

    return 0;
}
