> Are you thinking of constructs such as:
    'ADDRESS' taken_constant [expression]  [ 'WITH' connection]]

Yes. Specifically,  WITH input_redir [output_redir] [error_redir] .

>  Pointless for CMS or TSO since the concept of standard input/standard output 
> is alien to each.

Perhaps pointless for CMS, but the TSO stack has all of the necessary 
facilities. TSO commands do not normally BSAM/QSAM or TGET/TPUT for line mode 
terminal I/O, but use service routines.

 > Perhaps from Amiga?  OS/2?  AIX?  SAA?

Certainly not from OS/2 or SAA, since they don't have that facility. OS/2 uses 
RXQUEUE and pipes for capturing command output, e.g.

      'DIR FOO.* | RXQUEUE'

Will put the file list in the stem associated with the active queue.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Paul Gilmartin <0000000433f07816-dmarc-requ...@listserv.ua.edu>
Sent: Thursday, January 17, 2019 11:13 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Unreadable code (Was: Concurrent Server Task Dispatch issue 
multitasking issue)

On Tue, 15 Jan 2019 22:57:28 +0000, Seymour J Metz wrote:

>IBM never upgraded TSO/E for the REXX standard. I see nothing in z/OS TSO/E 
>REXX Reference Version2 Release3, SA32-0972-30 about built-in variables TRUE 
>and FALSE.
>
>More important, IMHO, is that IBM did not add the ANSI extensions to ADDRESS.
>>
>>http://secure-web.cisco.com/1ps8-jjITHM7k061aRsyP3fh7U59UdoVF9jCt1fPQ8_dweSsiSJqCd8sbAmQMpHeP3JSkqDOolCGSWsfeCEO_Y-MZtYSJCA8dwNbQ15TUjUYsi1rc1iV7yP9xIPXccg2LA_VLjlsHYkPODSd0-c6Fefjs9pbMZZLU-T0nl9Dz8JKqFLOKZtn_6VAzD47F1DpreW1rg-731MHOa3jVSYxGeJlPPc_soNCExHxZbsiYaSogAF0uLxjycVhm_pKwe9Thkf7Aa79emOg4o73k3NX3Ira_sSYTXGLXLIUQVV9x1osIrhh6TgQ2ERsW7idqwCptNLiWWQtJc1zzj19yytmcPPtKJJ_ThzeGnMnQWV5q2igUeNN-8Z6UfPs4GNY-wMzhWN3B515CJeSyXCzn5Qo63CoruahQy_LtecEgKEAg0NgDqy_gHCYk6HepOHLcNpVz/http%3A%2F%2Fwww.rexxla.org%2Frexxlang%2Fstandards%2F
>> has ordering information and links. At $125, I'd just go for the draft, but 
>>it's probably worth it if you're trying to implement ANSI-compliant Rexx 
>>(sic).
>>
>(direct link: 
>http://secure-web.cisco.com/18067JUtGA2FTOLLVQ2xoU5reLnjtcqfCMB4Zd392u73EzngVkpfI-8Yxc0gtDZ_GYtMieVO3mvl2qjqHzRmoFpHNClDcp-bVi5cNaZKT3RwfDoanek5Oj-rR8wVkkkTZ2zmoWlDcGqcgw3ivEwRHWnEvR5He5vJvUBdOUCkLvup6aH2yWkJcJfyBym-3kEMDW6LKLhXJvY0qsGkVkJoxb-G9sjieiFKU_An13kqMX25KGU9PTnfuB9xo1XvwLXNhgBr4MlmccL5C7J4hlAd8ROJpTOqRzYLtTGemhDD0PVAEYjuEETS3Q3S7zTq4BFVO7WQWtQ-0PDRhFa9FBTkPC-A3gJov3SMVfyKt9TwazzqKAI3lNoqgpLRIuvNcZKZoMisvDt4evC1QOgPoh2HCqiRKsoMECrLFGOm7sM3Ec-Jd0ReT-mUcbk3LNJ-PQi5c/http%3A%2F%2Fwww.rexxla.org%2Frexxlang%2Fstandards%2Fj18pub.pdf
>)
Are you thinking of constructs such as:
    'ADDRESS' taken_constant [expression]  [ 'WITH' connection]]

Intriguing.  Seems to be specifying redirection.  Pointless for CMS or TSO
since the concept of standard input/standard output is alien to each.  Relevant,
of course, to OMVS, but OMVS was unable to exert much influence on the
design of z/OS Rexx.

I wonder how this made its way into the Standard since standards tend to
be descriptive and rarely innovate extensions except to resolve ambiguities
or inconsistencies.

Perhaps from Amiga?  OS/2?  AIX?  SAA?

-- gil

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