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28 #ifndef V8_SMART_ARRAY_POINTER_H_
29 #define V8_SMART_ARRAY_POINTER_H_
35 // A 'scoped array pointer' that calls DeleteArray on its pointer when the
36 // destructor is called.
38 class SmartArrayPointer {
40 // Default constructor. Constructs an empty scoped pointer.
41 inline SmartArrayPointer() : p_(NULL) {}
43 // Constructs a scoped pointer from a plain one.
44 explicit inline SmartArrayPointer(T* ptr) : p_(ptr) {}
46 // Copy constructor removes the pointer from the original to avoid double
48 inline SmartArrayPointer(const SmartArrayPointer<T>& rhs) : p_(rhs.p_) {
49 const_cast<SmartArrayPointer<T>&>(rhs).p_ = NULL;
52 // When the destructor of the scoped pointer is executed the plain pointer
53 // is deleted using DeleteArray. This implies that you must allocate with
55 inline ~SmartArrayPointer() { if (p_) DeleteArray(p_); }
57 inline T* operator->() const { return p_; }
59 // You can get the underlying pointer out with the * operator.
60 inline T* operator*() { return p_; }
62 // You can use [n] to index as if it was a plain pointer
63 inline T& operator[](size_t i) {
67 // We don't have implicit conversion to a T* since that hinders migration:
68 // You would not be able to change a method from returning a T* to
69 // returning an SmartArrayPointer<T> and then get errors wherever it is used.
72 // If you want to take out the plain pointer and don't want it automatically
73 // deleted then call Detach(). Afterwards, the smart pointer is empty
81 // Assignment requires an empty (NULL) SmartArrayPointer as the receiver. Like
82 // the copy constructor it removes the pointer in the original to avoid
84 inline SmartArrayPointer& operator=(const SmartArrayPointer<T>& rhs) {
86 T* tmp = rhs.p_; // swap to handle self-assignment
87 const_cast<SmartArrayPointer<T>&>(rhs).p_ = NULL;
92 inline bool is_empty() { return p_ == NULL; }
98 } } // namespace v8::internal
100 #endif // V8_SMART_ARRAY_POINTER_H_