Question

I have a function where I want a cleanup action done 90% of the time, but in 10% I want some other action to be done.

Is there some way to use some standard scoped control likeshared_ptr<> so that initially it can have one delete action and then later in the function the delete action can be changed?

shared_ptr<T> ptr( new T, std::mem_fun_ref(&T::deleteMe) );
ptr.pn.d = std::mem_fun_ref(&T::queueMe);

Answer 1

I don’t think you can change the deleter once the shared_ptr was created.

But why would you do that ? Usually, when you create an object, you know immediatly how it must be destroyed. This is not likely to change.

If you really must do some specific treatments, you still can provide a custom deleter which does special things depending on the required logic.