====== Paul Gilmartin ====== wrote 2006-08-20 02:16:
In a recent note, Thomas Berg said:
o Absence of facility to enumerate members of a compound variable.
Right, but is it really essential ? AFAICS, You can solve this
quite easily programmatically. (Albeit clumsy.)
How? One can come close by coding a function package in some other
language, but if I understand correctly even that can't precisely
entirely copy a compound from one stem to another.
Well, I said clumsy. When I have the need to remember the compund tails
I just saves them as strings, simple example:
Parse Pull xyz
stem.xyz = 1
tails = tails xyz
etc.
o Absence of instream data sets.
I dont understand this one.
Was I unclear? Examples from other languages:
o JCL:
//SYSIN DD DATA,DLM=XX
...
XX
o POSIX Shell:
cat <<XX
...
XX
POSIX excels JCL in this respect because POSIX supports
symbol substitution in the "here-document". I've used sourceline()
to achieve the effect in Rexx.
OK, I was also thinking of the JCL //SYSIN example, I just didn't understand
what
the need/usage was. But Your right about the limitation in rexx.
I usually uses stems for that effect. I have somewhat hesitate to use
sourceline()
as I have the feeling that it's to obscure or fragile (regarding changes in
code).
I think so. (Perhaps excluding "concurrent ATTCHPGM", but that's maybe
because TSO don't permit that ?)
This is IBM-MAIN, not TSO-REXX. The base z/OS Rexx operates in
at least two z/OS environments other than TSO.
Yes. I just thinked of the reason that it was originally designed that way.
"[D]o[es]n't permit"? What happens if a program CALLed from TSO
issues an ATTACH SVC or several?
I don't know. I have just read that TSO, in the way it invokes programs, don't
"allow" that possibility.
-- gil
--
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