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46 lines
933 B
C++
46 lines
933 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <AK/StdLibExtras.h>
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#include <AK/Types.h>
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namespace AK {
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template<typename T>
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class NeverDestroyed {
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AK_MAKE_NONCOPYABLE(NeverDestroyed);
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AK_MAKE_NONMOVABLE(NeverDestroyed);
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public:
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template<typename... Args>
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NeverDestroyed(Args&&... args)
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{
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new (storage) T(forward<Args>(args)...);
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}
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~NeverDestroyed() = default;
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T* operator->() { return &get(); }
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T const* operator->() const { return &get(); }
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T& operator*() { return get(); }
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T const& operator*() const { return get(); }
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T& get() { return reinterpret_cast<T&>(storage); }
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T const& get() const { return reinterpret_cast<T&>(storage); }
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private:
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alignas(T) u8 storage[sizeof(T)];
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};
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}
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#if USING_AK_GLOBALLY
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using AK::NeverDestroyed;
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#endif
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