On Tue, 27 Feb 2024 16:46:28 +0200, Binyamin Dissen
<[email protected]> wrote:
>How is different than the case at the bottom?
>:>Because 24(R3) is not an expression. The second operand of the USING must be
>either a register number or a relocatable expression
Sadly, HLASM improvements barely keep the product alive otherwise we would see
REXX as an alternative to macro language. While USING SOMELABEL,MYLABEL may
generate 24(R3) internally, you cannot specify USING SOMELABEL,24(R3). You
could argue 24(R3) is a relocatable expression. I suspect that EQU will have
the same problem. You must accept HLASM with its blemishes and learn to work
around those blemishes. Some solutions to your problem as follows:
1. R3 is an EQU with type undefined. Maybe there is a type of "register" which
would allow 24(R3) to be considered a relocatable expression. R3 is ambiguous
because the assembler doesn't know if R3 represents a length, register or index
register.
2. Maybe EQU supports type S-CON that would allow it to be used as an arg in
the MVC. E.g. LBL EQU 24(R3),TYPE=SCON,LENGTH=2 used in MVC LBL,OTHER.
3. Force the user to code a length of 2 or omit the length. If var contains "("
then it must be "(2," or "(,".
4. If var contains "(" then replace it with "(2," and let it fail if the user
coded a length.
5. If you don't like using ORG then maybe EX is more to your liking. I'm not
saying I would use this method but different strokes for different folds.
