| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #pragma once |
| |
| #include <memory> |
| #include <utility> |
| |
| namespace android { |
| |
| namespace aidl { |
| |
| // nullable/make_nullable provide source-level compatibility between std::opional and std::unique_ptr |
| // usage: |
| // nullable<Foo> a; |
| // nullable<Foo> b = make_nullable<Foo>(...); |
| // auto c = make_nullable<Foo>(...); |
| // c.reset(); |
| // c = make_nullable<Foo>(...); |
| // c = std::move(a); |
| |
| template <typename T> |
| using nullable = std::unique_ptr<T>; |
| |
| template <typename T, typename... Args> |
| inline nullable<T> make_nullable(Args&&... args) { |
| return std::make_unique<T>(std::forward<Args>(args)...); |
| } |
| |
| } // namespace aidl |
| |
| } // namespace android |
