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#include <stdio.h>
 
class Base
{
   public:
      Base() {}
      virtual ~Base(){}
 
      virtual bool match( const void *data ) const { return false; }
};
 
template <class Type>
class Derived: public Base
{
   public:
      Derived():Base() {}
      ~Derived() override{}
 
      virtual bool match( const Type *data ) const override { return true; }
};
 
int main(int argc, char **argv)
{
   Derived<int> *d = new Derived<int>();
   Base *b         = d;
 
   int i;
   printf("B match = %s\n",b->match(&i)?"True":"False");
   printf("D match = %s\n",d->match(&i)?"True":"False");
}
 

prog.cpp: In instantiation of 'class Derived<int>':
prog.cpp:24:39:   required from here
prog.cpp:19:20: error: 'bool Derived<Type>::match(const Type*) const [with Type = int]' marked 'override', but does not override
       virtual bool match( const Type *data ) const override { return true; }
                    ^

Standard output is empty