Well, the first thing I see is that &sysname and &sysplex are not REXX
variables, so what is happening is not the REXX substitution given in the
manual. My suspicions is that there is no REXX substitution in
MVSVAR('SYMDEF','foo'), but that the author is describing the normal REXX
processing of any argument in any function, i.e.,
foo = bar
baz = MVSVAR('SYMDEF',foo)
gives the same result as
baz = MVSVAR('SYMDEF','bar')
I don't have a system to try it on, but give it a whirl and see what happens.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List <[email protected]> on behalf of
Paul Gilmartin <[email protected]>
Sent: Thursday, March 26, 2020 9:39 AM
To: [email protected]
Subject: Re: REXX MVSVAR SYMDEF behavoiur
On Wed, 25 Mar 2020 04:43:52 -0500, Bruce Hewson wrote:
>
>In a REXX exec I was building I stumbled onto:-
>
>Say 'MVSVAR'("SYMDEF",'testing &sysname in &sysplex')
>
>which provides an unexpected result
>
>&'TESTING SYSA IN PLEX01'.
>
>The symbols &SYSNAME and &SYSPLEX were replaced.
>And, sadly, the whole lot was uppercased.
>
>Couldn't find this behaviour documented.
>
I wonder how this is influenced by the statement in the Ref.:
The MVSVAR('SYMDEF',string) function goes through REXX substitution for
string first,
the result of which must be a 1-8 character symbolic-name specifying the
symbol that
has been defined in the SYMDEF statement. Any other values including REXX
delimiters
might cause unpredictable results.
... since the value of an unassigned symbol is its name, uppercased.
What happens if you provide values for the symbol-tokens?:
testing = 'xxxx'
in = 'yyyy'
Say 'MVSVAR'("SYMDEF",'testing &sysname in &sysplex')
... pretty weird regardless.
-- gil
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