FSVO goto that lives in a different universe from PL/I. The REXX signal
statement trashes the stack rather than simply popping it appropriately.
Consider
do I=1 to n
do j=1 to m
...
if foo then signal bar
...
end
...
bar:
...
end
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of
David Spiegel <dspiegel...@hotmail.com>
Sent: Friday, January 11, 2019 3:38 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Unreadable code (Was: Concurrent Server Task Dispatch issue
multitasking issue)
Hi R'Shmuel,
"... signal is not a goto ..." ?!
It is also true that Signal has other operands, but, in its most basic
form it is EXACTLY a goto.
Regards,
David
On 2019-01-11 15:32, Seymour J Metz wrote:
> A lot of the syntax comes from PL/I, although not the use of a continuation
> character and not the use of labels (no, signal is not a goto.)
>
>
> --
> Shmuel (Seymour J.) Metz
> https://eur01.safelinks.protection.outlook.com/?url=http:%2F%2Fmason.gmu.edu%2F~smetz3&data=02%7C01%7C%7Cf91df8aa05b2424ac21808d67804058f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636828356004192153&sdata=R4qBf6zROqkxfRibpdhnLSMnoo%2B7e4w1mJo7zxJ7F80%3D&reserved=0
>
> ________________________________________
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of
> Paul Gilmartin <0000000433f07816-dmarc-requ...@listserv.ua.edu>
> Sent: Thursday, January 10, 2019 9:27 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: Unreadable code (Was: Concurrent Server Task Dispatch issue
> multitasking issue)
>
> On Thu, 10 Jan 2019 19:30:41 -0500, zMan wrote:
>
>> Semicolons?😀
>>
> (My laptop doesn't speak emoji.)
>
> Semicolons, yes, but:
> do <=> {
> end <=> }
> switch <=> SELECT
> ...
> I think Rexx got much of its lexical flavor from PL/I. But that's easy for
> me to say becase I don't know PL/I.
>
>> On Thu, Jan 10, 2019 at 6:48 PM Steve Smith wrote:
>>
>>> REXX is lot like C? I can't think of anything they have in common beyond
>>> the minimum basics of any procedural language.
> Bless Rexx for making ';' and newline very nearly interchangeable, in contrast
> to POSIX Shell script, where they aren't.
>
> -- gil
>
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