2 #define F(t,n) {t *y = &x.n;}
3 #define C(n) switch(n){case n:;}
12 {void(*p)(struct if_nameindex*) = if_freenameindex;}
13 {char*(*p)(unsigned,char*) = if_indextoname;}
14 {struct if_nameindex*(*p)(void) = if_nameindex;}
15 {unsigned(*p)(const char*) = if_nametoindex;}