Re: Scope of variables and subprocedures.

Comments in line:

From: <bmorris@ca.ibm.com>
> >> - scoped names within data structures so you can have subfield A in
> >>   two different data structures
> >
> >How do you envision this working? If you're thinking of something like
> >COBOL, then references to subfield A would have to be qualified with the
> >data structure name. If that's what you're thinking of, RPG already has
it
> >to some degree with the PREFIX() keyword.
>
> To some degree, yes, but only for externally-described data structures.
> I indeed envision it something like COBOL or C, where references would be
> qualified with the data structure name.

You're right. Of course, then we'd *really* want the CF spec so we'd have
room for it without having to split stuff onto multiple lines.


> >> - variable-type in prototyped parameters
>
> >What does this mean? Passing fieldA as alpha one time, then as numeric
the
> >next?
>
> Sort of.  More a matter of passing alpha fieldA as a parameter to some
> procedure one time, and then passing numeric fieldN as a parameter
> to the same procedure the next time.

I've just been reading Jon Paris' section in Redpiece SG24-5402-00, which
makes it sound like using CONST on a parameter prototype will do this:

"The CONST keyword tells the compiler to allow a constant
value or a variable with a different format (in terms of numeric type,
length or
decimal positions) to be passed on the call.  <snip> Now not only can
MyParm1
be used, but MyParm2 (a packed field) and the literal 25, can also be used.
The compiler will generate the additional logic to convert the field to the
correct format (if required) and pass it to the C function."

Peter Dow
Dow Software Services, Inc.
909 425-0194 voice
909 425-0196 fax

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