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/*-
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include "mongo/base/concept/convertible_to.h"
namespace mongo {
namespace concept {
/**
* The `UniquePtr` Concept models a movable owning pointer of an object.
* `std::unique_ptr< T >` is a model of `mongo::concept::UniquePtr< T >`.
*/
template <typename T>
struct UniquePtr {
/** The `UniquePtr< T >` must retire its pointer to `T` on destruction. */
~UniquePtr() noexcept;
UniquePtr(UniquePtr&& p);
UniquePtr& operator=(UniquePtr&& p);
UniquePtr();
UniquePtr(T* p);
ConvertibleTo<T*> operator->() const;
T& operator*() const;
explicit operator bool() const;
ConvertibleTo<T*> get() const;
void reset() noexcept;
void reset(ConvertibleTo<T*>);
};
/*! A `UniquePtr` object must be equality comparable. */
template <typename T>
bool operator==(const UniquePtr<T>& lhs, const UniquePtr<T>& rhs);
/*! A `UniquePtr` object must be inequality comparable. */
template <typename T>
bool operator!=(const UniquePtr<T>& lhs, const UniquePtr<T>& rhs);
} // namespace concept
} // namespace mongo
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