1*f4a2713aSLionel Sambuc #pragma GCC system_header 2*f4a2713aSLionel Sambuc #pragma once 3*f4a2713aSLionel Sambuc f()4*f4a2713aSLionel Sambuc inline void f() { register int k; } 5*f4a2713aSLionel Sambuc #define to_int(x) ({ register int n = (x); n; }) 6