Caché ObjectScript Reference - InterSystems Documentation

NEWSubroutines with Parameter PassingIf you call a subroutine with parameter passing, Caché issues an implicit NEW commandfor each of the variables named in the subroutine's formal parameter list. It then assigns thevalues passed in the DO command's actual parameter list (by value or by reference) to thesevariables.If the DO command uses parameter passing by value and if the formal list names any existinglocal variables, Caché places the existing variables and their values on the stack. When thesubroutine terminates (with either an explicit or an implicit QUIT), Caché issues an implicitKILL command for each of the formal list variables to restore them from the stack.When using NEW command within a subroutine, never specify any of the variables namedin the subroutine's formal parameter list. By defining these variables as NEW, you renderthem undefined and make their passed values inaccessible.See Also• DO command• QUIT command• SET command• $ETRAP special variableCaché ObjectScript Reference 99