fork download

class Base { /* ... */ };
class Derived : public base { /* ... */ };
 
template <class T>
class Mixin : public T { /* ... */ };
 
int main()
{
	Base            b;
	Derived         d;
 
	Mixin<Base>     mb;
	Mixin<Derived>  md;
 
	b  = d          // ok
	mb = md;        // syntax error
	return 0;
}

prog.cpp:2:29: error: expected class-name before '{' token
 class Derived : public base { /* ... */ };
                             ^
prog.cpp: In function 'int main()':
prog.cpp:15:5: error: no match for 'operator=' (operand types are 'Base' and 'Derived')
  b  = d          // ok
     ^
prog.cpp:15:5: note: candidate is:
prog.cpp:1:7: note: Base& Base::operator=(const Base&)
 class Base { /* ... */ };
       ^
prog.cpp:1:7: note:   no known conversion for argument 1 from 'Derived' to 'const Base&'

Standard output is empty