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#include <iostream>
 
template <class T> class X { /* ... */ };
void f()
{
  struct S { /* ... */ };
 
  X<S> x3;  // error: local type used as template-argument
  X<S*> x4; // error: pointer to local type used as template-argument
}
 
int main() {
 
	f();
 
	return 0;
}

prog.cpp: In function ‘void f()’:
prog.cpp:8:6: error: template argument for ‘template<class T> class X’ uses local type ‘f()::S’
   X<S> x3;  // error: local type used as template-argument
      ^
prog.cpp:8:6: error:   trying to instantiate ‘template<class T> class X’
prog.cpp:8:10: error: invalid type in declaration before ‘;’ token
   X<S> x3;  // error: local type used as template-argument
          ^
prog.cpp:9:7: error: template argument for ‘template<class T> class X’ uses local type ‘f()::S*’
   X<S*> x4; // error: pointer to local type used as template-argument
       ^
prog.cpp:9:7: error:   trying to instantiate ‘template<class T> class X’
prog.cpp:9:11: error: invalid type in declaration before ‘;’ token
   X<S*> x4; // error: pointer to local type used as template-argument
           ^
prog.cpp:8:8: warning: unused variable ‘x3’ [-Wunused-variable]
   X<S> x3;  // error: local type used as template-argument
        ^
prog.cpp:9:9: warning: unused variable ‘x4’ [-Wunused-variable]
   X<S*> x4; // error: pointer to local type used as template-argument
         ^

Standard output is empty