Thread: With shared_ptr, can custom destructor take multiple objects?

Is there a way to pass multiple objects to the custom destructor for a shared_ptr? OR, can i pass an instance's function?

Originally Posted by 6tr6tr

Is there a way to pass multiple objects to the custom destructor for a shared_ptr? OR, can i pass an instance's function?

Eh, what? That makes even less sense than usual.

A shared_ptr doesn't have a "custom destructor," its destructor simply deletes the object being pointed to. If that object has a polymorphic destructor, then the proper destructor will be invoked. I can't make heads or tails of what you're asking.

Originally Posted by brewbuck

Eh, what? That makes even less sense than usual.

A shared_ptr doesn't have a "custom destructor," its destructor simply deletes the object being pointed to. If that object has a polymorphic destructor, then the proper destructor will be invoked. I can't make heads or tails of what you're asking.

Sorry, I mean "custom deleter."

Originally Posted by 6tr6tr

Sorry, I mean "custom deleter."

You can always make a "custom deleter" by overloading the delete operator for the class in question.

According to the documentation for smart_ptr

Code:

template<class Y, class D> shared_ptr(Y * p, D d);

it takes a deletor object, and it looks like the destructor just calls: d(p);
So you can create your custom deletor's constructor to take as many parameters as you want, just as long as the operator() function only takes 1 parameter which is the pointer to be deleted.