Thanks! I've found statement in intrpvar.h:
PERLVAR(I, stack_sp, SV **) /* top of the stack */
and in perl.h:
# define PERLVAR(prefix,var,type) type prefix##var;
/* 'var' is an array of length 'n' */
# define PERLVARA(prefix,var,n,type) type prefix##var[n];
/* initialize 'var' to init' */
# define PERLVARI(prefix,var,type,init) type prefix##var;
/* like PERLVARI, but make 'var' a const */
# define PERLVARIC(prefix,var,type,init) type prefix##var;
struct interpreter {
# include "intrpvar.h"
};
So perl use PERLVAR to define perlinterpreter struct, it's strange to me, why is it not define perlinterpreter structure directly in perl.h?
Please enlighten me.
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