class base { public: virtual void fn(){} }; class der : public base {}; I know that compiler provides a member call VPTR inclass which is initialised with th开发者_StackOverflow社区e exact VTABLE a
Say we have Class A { public: int 开发者_运维知识库_i; virtual int getI(); }; class B : public A { public:
This is not about \"When VTABLE is created?\". Rather, when the VPTR should be initialized? Is it at the beginning/end of the constructor or before/after the constructor?
First of all, I want to make myself clear that I do understand that there is no notion of vtables and vptrs in the C++ standard. However I think that virtually all implementations implement the virtua
While debugging one of the p开发者_如何学Gorogram\'s core dump I came across the scenario where its contained object which is polymorphic loses its VPTr and I can see its pointing to NULL.
I am little confused about vptr and representation of objects in the memory, and hope you can help me understand the matter better.
I was wondering if there is a possible optimization where the compiler does not need to assign a vptr to an instantiated object even though the object\'s type is a class with virtual methods.
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