46 #ifndef vtkWeakPointer_h
47 #define vtkWeakPointer_h
54 #include <type_traits>
64 template <
typename U = T>
65 static void CheckTypes() noexcept
68 "vtkWeakPointer<T>'s T type has not been defined. Missing "
71 "Cannot store an object with undefined type in "
72 "vtkWeakPointer. Missing include?");
74 "Argument type is not compatible with vtkWeakPointer<T>'s "
77 "vtkWeakPointer can only be used with subclasses of "
103 vtkWeakPointer::CheckTypes<U>();
120 vtkWeakPointer::CheckTypes<U>();
131 vtkWeakPointer::CheckTypes();
134 template <
typename U>
138 vtkWeakPointer::CheckTypes<U>();
155 vtkWeakPointer::CheckTypes<U>();
175 vtkWeakPointer::CheckTypes<U>();
188 vtkWeakPointer::CheckTypes();
193 template <
typename U>
196 vtkWeakPointer::CheckTypes<U>();
208 T*
Get() const noexcept {
return static_cast<T*
>(this->
Object); }
209 operator T*()
const noexcept {
return static_cast<T*
>(this->
Object); }
227 #if defined(__HP_aCC) || defined(__IBMCPP__)
228 #define VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(op) \
229 bool operator op(NullPointerOnly*) const { return ::operator op(*this, 0); }
232 class NullPointerOnly
237 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(==)
238 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(!=)
239 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(<)
240 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(<=)
241 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(>)
242 VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND(>=)
243 #undef VTK_WEAK_POINTER_DEFINE_OPERATOR_WORKAROUND
258 #define VTK_WEAK_POINTER_DEFINE_OPERATOR(op) \
259 template <class T, class U> \
260 inline bool operator op(const vtkWeakPointer<T>& l, const vtkWeakPointer<U>& r) \
262 return (l.GetPointer() op r.GetPointer()); \
264 template <class T, class U> \
265 inline bool operator op(T* l, const vtkWeakPointer<U>& r) \
267 return (l op r.GetPointer()); \
269 template <class T, class U> \
270 inline bool operator op(const vtkWeakPointer<T>& l, U* r) \
272 return (l.GetPointer() op r); \
274 template <class T, class U> \
275 inline bool operator op(const vtkNew<T>& l, const vtkWeakPointer<U>& r) \
277 return (l.GetPointer() op r.GetPointer()); \
279 template <class T, class U> \
280 inline bool operator op(const vtkWeakPointer<T>& l, const vtkNew<U>& r) \
282 return (l.GetPointer() op r.GetPointer); \
295 #undef VTK_WEAK_POINTER_DEFINE_OPERATOR
302 template <
typename T>
314 inline ostream& operator<<(ostream& os, const vtkWeakPointer<T>& p)
316 return os << static_cast<const vtkWeakPointerBase&>(p);
T * Get() const noexcept
Get the contained pointer.
vtkWeakPointerBase & operator=(vtkObjectBase *r)
Assign object to reference.
vtkWeakPointer(const vtkWeakPointer &r)
Initialize smart pointer with the given smart pointer.
vtkWeakPointer & operator=(const vtkWeakPointer< U > &r)
Assign object to reference.
T * GetPointer() const noexcept
Get the contained pointer.
vtkWeakPointer(vtkWeakPointer &&r) noexcept
Move r's object into the new weak pointer, setting r to nullptr.
vtkWeakPointer(T *r)
Initialize smart pointer to given object.
Specialization of tuple ranges and iterators for vtkAOSDataArrayTemplate.
vtkWeakPointer & operator=(vtkWeakPointer< U > &&r) noexcept
Move r's object into this weak pointer, setting r to nullptr.
vtkWeakPointer & operator=(const vtkNew< U > &r)
Assign object to reference.
vtkWeakPointer(const vtkWeakPointer< U > &r)
Initialize smart pointer with the given smart pointer.
vtkWeakPointer() noexcept
Initialize smart pointer to nullptr.
vtkWeakPointer(T *r, const NoReference &n)
Get the contained pointer.
a weak reference to a vtkObject.
Non-templated superclass for vtkWeakPointer.
vtkWeakPointer & operator=(T *r)
Assign object to reference.
vtkWeakPointer(const vtkNew< U > &r)
Initialize smart pointer with the given smart pointer.
vtkWeakPointer & operator=(vtkWeakPointer &&r) noexcept
Move r's object into this weak pointer, setting r to nullptr.
Allocate and hold a VTK object.
#define VTK_WEAK_POINTER_DEFINE_OPERATOR(op)
vtkWeakPointer & operator=(const vtkWeakPointer &r)
Assign object to reference.
vtkWeakPointer< T > TakeWeakPointer(T *obj)
Construct a vtkWeakPointer containing obj.
T * operator->() const noexcept
Provides normal pointer target member access using operator ->.
vtkWeakPointer(vtkWeakPointer< U > &&r) noexcept
Initialize smart pointer with the given smart pointer.
T & operator*() const noexcept
Dereference the pointer and return a reference to the contained object.