43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* PImpl.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <memory>
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template <class T>
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class PImpl {
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std::unique_ptr<T> impl;
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struct ConstructorTag {};
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template <class... Args>
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PImpl(ConstructorTag, Args&&... args) : impl(std::make_unique<T>(std::forward<Args>(args)...)) {}
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public:
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PImpl() = default;
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template <class... Args>
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static PImpl create(Args&&... args) {
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return PImpl(ConstructorTag{}, std::forward<Args>(args)...);
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}
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T& operator*() { return *impl; }
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T const& operator*() const { return *impl; }
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T* operator->() { return impl.get(); }
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T const* operator->() const { return impl.get(); }
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};
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