17. More on template specialization

• It's also possible to treat entire groups of types separately.

• For example, you can treat all pointer-types differently compared to non-pointer types:

  
      // Most general version goes first:
      template < typename ValueT >
      class Stack< ValueT > {
          //...
      };
  
      // Specialization for pointer-types follows:
      template < typename ValueT >
      class Stack< ValueT* > {
          //...
      };