"IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> wrote on
08/16/2023 08:24:37 AM:
> I'd think that many would find it strange to have the equates
> precede the field definition.
> If you must use "*" for the equate, that is appropriate.
>
> Or, you might choose an approach such as the following:
> F1 DS B
> F1B0 EQU F1,X'80'
I can see that point. Some might also be uncomfortable having an
unnamed data field as well. Thus, naming the field and using it as a
reference point in the following equated bit masks is a good idea.
"IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> wrote on
08/16/2023 08:40:56 AM:
> With regard to someone calling the macros with a symbol that was not
> defined with them in mind, an additional hack is possible; use the
> type operand of the EQU to designate 8-bit, 16-bit HH, 16-bit HL,
> 16-bit LH or 16-bit LL, and test it in the macros.
I can see the value of being able to do some validation in the
macro. However, in an effort to "help" the programmer not shoot
themselves in the foot, there have been cases where it limits the
flexibility of the programmer to express their individuality in how they
want to code things. For example, if I limit the macro to validate for
binary masks and the programmer wants to use hexadecimal masks, they might
not be too happy. So, if I allow either binary masks OR hexadecimal masks
and the programmer wants to use character or numeric masks then, again,
they might feel restricted. Where do you draw the line?
Sincerely,
Dave Clark
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