added Ptr::operator==

modules/core/include/opencv2/core/core.hpp

@@ -1284,6 +1284,8 @@ public:
     operator _Tp* ();
     operator const _Tp*() const;
 
+    bool operator==(const Ptr<_Tp>& ptr) const;
+
     _Tp* obj; //< the object pointer.
     int* refcount; //< the associated reference counter
 };

modules/core/include/opencv2/core/operations.hpp

@@ -2690,6 +2690,11 @@ template<typename _Tp> template<typename _Tp2> inline const Ptr<_Tp2> Ptr<_Tp>::
     return p;
 }
 
+template<typename _Tp> inline bool Ptr<_Tp>::operator==(const Ptr<_Tp>& _ptr) const
+{
+    return refcount == _ptr.refcount;
+}
+
 //// specializied implementations of Ptr::delete_obj() for classic OpenCV types
 
 template<> CV_EXPORTS void Ptr<CvMat>::delete_obj();