Question

For example

class A {
 public:
   void fun(Array a);
   void fun(Vector a);
   /* Most codes in these two functions are same. */
   /* Can certainly be merged into a template function if they were not member functions. */
}

Please note that I hope to have both these two versions of fun() in class A. Thanks.

Answer 1

Even if the class is not templated itself you can write a member function that is templated in the same manner that you would write a templated function that was not a method of a class.

template <class myType >
myType func (myType a) {
 /* do something */;
}