Have a template parameter that can be pointer or value

Suppose I have something like:

template <class T>
void do_something(T t){
  pass_it_somewhere(t);
  t->do_something();
}

Now it would be useful that T is allowed to be a pointer or a value. Function do_something(...) can basically handle pointers and values, except for the t->do_something(). For pointers, I would need a -> and for values, I would need a . to access members.

Is there a way to make T accept pointers and values?