HELP EXITFROM Ros Barrett, January 1986
exitfrom(<procedure | call stack length>)
EXITFROM takes one argument, either a procedure higher up in the calling
stack than the caller, or an integer representing a call stack length as
returned by *CALLSTACKLENGTH. Control leaves the caller immediately
EXITFROM is called. Instructions in the caller and the called procedure,
and instructions in procedures in the calling stack in between the two,
are never finished. If the first argument is an integer, exiting
terminates when the call stack length is equal to or less than the
integer. Values of variables which are local to procedures in between
the caller of EXITFROM and the procedure control returns to, are reset
appropriately.
For other non-standard control structures, see HELP *CHAIN, *CHAINFROM,
*CHAINTO, *EXITTO, *CATCH, *JUMPOUT,
See HELP
*CALLER - Procedure identifying a single caller at a specified level
*INTERRUPT - On POP-11 interrupt procedures
*CONTROL - for a summary of control structures in POP-11