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AK: Add RefPtrTraits to allow implementing custom null pointers
This adds the ability to implement custom null states that allow storing state in null pointers.
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5 changed files with 131 additions and 71 deletions
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@ -113,6 +113,9 @@ template<typename T>
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class Optional;
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template<typename T>
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class RefPtrTraits;
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template<typename T, typename PtrTraits = RefPtrTraits<T>>
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class RefPtr;
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template<typename T>
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