//===----------------------------------------------------------------------===//
//
// 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
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//

// MIT License
//
// Modifications Copyright (C) 2025 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// SOFTWARE.

// UNSUPPORTED: c++03, c++11

// <cuda/std/optional>

// A program that necessitates the instantiation of template optional for
// (possibly cv-qualified) nullopt_t is ill-formed.

#include <cuda/std/optional>

int main(int, char**)
{
  using cuda::std::nullopt;
  using cuda::std::nullopt_t;
  using cuda::std::optional;

  optional<nullopt_t> opt; // expected-note
  optional<const nullopt_t> opt1; // expected-note
  optional<nullopt_t&> opt2; // expected-note
  optional<nullopt_t&&> opt3; // expected-note
  // expected-error@optional:* 4 instantiation of optional with nullopt_t is ill-formed

  return 0;
}
