/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * 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.
 */

#ifndef ASYNC_SIMPLE_MOVEWRAPPER_H
#define ASYNC_SIMPLE_MOVEWRAPPER_H

#include <exception>
#include "async_simple/Common.h"

namespace async_simple {

// std::function requre copyConstructable, hence we provide MoveWrapper perform
// copy as move.
template <typename T>
class MoveWrapper {
public:
    MoveWrapper() = default;
    MoveWrapper(T&& value) : _value(std::move(value)) {}

    MoveWrapper(const MoveWrapper& other) : _value(std::move(other._value)) {}
    MoveWrapper(MoveWrapper&& other) : _value(std::move(other._value)) {}

    MoveWrapper& operator=(const MoveWrapper&) = delete;
    MoveWrapper& operator=(MoveWrapper&&) = delete;

    T& get() { return _value; }
    const T& get() const { return _value; }

    ~MoveWrapper() {}

private:
    mutable T _value;
};

}  // namespace async_simple

#endif  // ASYNC_SIMPLE_MOVEWRAPPER_H
