On 2020-06-02, at 11:21:23, Seymour J Metz wrote:
>
> SIGNAL in PL/I is well behaved; in REXX, not so much.
>
> I like REXX, but it would have been much cleaner had iterate and leave used a
> label on the do rather than using the control variable.
>
Yes.
> It would also have been cleaner had there been a proper GOTO so that people
> wouldn't shoot themselves in the foot misusing SIGNAL as an ersatz goto.
>
> What are long-ITERATE and long-LEAVE?
>
Imagine:
DO LOOP = 1
CALL PROC
epilogue
END LOOP
...
PROC: PROCEDURE EXPOSE LOOP
stuff
IF boolean THEN ITERATE LOOP /* bypass epilogue. */
more stuff
RETURN /* to perform epilogue. */
-- gil
