CODEWITHSUNDEEP
c++operator-overloading
sharptooth
sharptooth

Reputation: 170469

If an operator is overloaded for a C++ class how could I use a default operator instead?

_com_ptr_ has an overloaded operator&() with a side effect. If I have a variable:

_com_ptr_t<Interface> variable;

How could I retrieve its address (_com_ptr_t<Interface>* pointer) without calling the overloaded operator and triggering the side effect?

Upvotes: 5

Views: 753

Answers (3)

Daniel Earwicker
Daniel Earwicker

Reputation: 116654

I define this utility function:

template<typename T>
T *GetRealAddr(T &t)
    { return reinterpret_cast<T*>(&reinterpret_cast<unsigned char &>(t)); }

Upvotes: 3

MSalters
MSalters

Reputation: 179779

I've seen this case pop up in an ISO meeting as it broke some offsetof() macro implementations (LWG 273). The solution: &reinterpret_cast<unsigned char&>(variable)

Upvotes: 7

Goz
Goz

Reputation: 62323

&variable.GetInterfacePtr();

Upvotes: 0

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