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class Cell; // Alias for HeapObject::IsCell() that avoids inlining. V8_EXPORT_PRIVATE bool IsCell_NonInline(HeapObject o); template <class D, class P> class TorqueGeneratedCell : public P { static_assert(std::is_same<Cell, D>::value, "Use this class as direct base for Cell."); static_assert(std::is_same<HeapObject, P>::value, "Pass in HeapObject as second template parameter for TorqueGeneratedCell."); public: using Super = P; using TorqueGeneratedClass = TorqueGeneratedCell<D,P>; inline Object value() const; inline Object value(PtrComprCageBase cage_base) const; inline void set_value(Object value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER); V8_INLINE static D cast(Object object) { return D(object.ptr()); } V8_INLINE static D unchecked_cast(Object object) { return bit_cast<D>(object); } DECL_PRINTER(Cell) #ifdef VERIFY_HEAP V8_EXPORT_PRIVATE void CellVerify(Isolate* isolate); #endif // VERIFY_HEAP static constexpr int kStartOfStrongFieldsOffset = P::kHeaderSize; static constexpr int kValueOffset = P::kHeaderSize; static constexpr int kValueOffsetEnd = kValueOffset + kTaggedSize - 1; static constexpr int kEndOfStrongFieldsOffset = kValueOffsetEnd + 1; static constexpr int kStartOfWeakFieldsOffset = kValueOffsetEnd + 1; static constexpr int kEndOfWeakFieldsOffset = kValueOffsetEnd + 1; static constexpr int kHeaderSize = kValueOffsetEnd + 1; static constexpr int kSize = kValueOffsetEnd + 1; V8_INLINE static constexpr int32_t SizeFor() { DCHECK(kHeaderSize == kSize && kHeaderSize == 16); int32_t size = kHeaderSize; return size; } V8_INLINE int32_t AllocatedSize() const { return SizeFor(); } friend class Factory; public: template <class DAlias = D> constexpr TorqueGeneratedCell() : P() { static_assert(std::is_base_of<TorqueGeneratedCell, DAlias>::value, "class TorqueGeneratedCell should be used as direct base for Cell."); } protected: inline explicit TorqueGeneratedCell(Address ptr); // Special-purpose constructor for subclasses that have fast paths where // their ptr() is a Smi. inline explicit TorqueGeneratedCell(Address ptr, HeapObject::AllowInlineSmiStorage allow_smi); };