in reply to Re^2: parm#4 from caller == !"eval" ?
in thread Re: parm#4 from caller == !"eval" ?
> Subroutines may be called recursively. If a subroutine is called using the & form, the argument list is optional, and if omitted, no @_ array is set up for the subroutine: the @_ array at the time of the call is visible to subroutine instead. This is an efficiency mechanism that new users may wish to avoid.