Re: Service Program Argument Optimization

[Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>]

> I thought that if a parameter was passed by reference, because the
> address was in the main module's pointer space, that you couldn't get
> a pointer to it from a called module.  Where did I get that idea?
> This will make things much more efficient.  Thanks!

You can get a pointer to a reference parameter, but you're right, that 
pointer will point to data that's in the called module.  (I don't know if 
that matters to you.)

The reason you can't get a pointer to a CONST field is that the pointer 
would allow you to change the data. The compiler makes sure you can't 
change data that's defined as CONST, so it blocks your ability to get a 
pointer to it.

In C it's possible to define a CONST pointer, which allows you to get a 
pointer to data, but doesn't allow you to change the data...  RPG doesn't 
have anything like that (yet)