Can a constant be global?

Robert Brenstein rjb at robelko.com
Mon Mar 27 07:04:25 EST 2006


>This is another of those things that I've lived without for years - 
>I normally use globals to contain text strings which may change if 
>the human language of the app changes (what is the Welsh for 
>"Cancel"? - don't know, but I know someone who can tell me!), so 
>that all the values can be initialised in one handler when the app 
>starts up: but after all this time I thought I'd try using constants 
>instead.
>
>However neither the RR documentation nor my experiments seem to 
>suggest that there is a way of making constants global (i.e 
>constant). Can this really be true? If so, they have a crushing 
>disadvantage with respect to globals. After all, RR's own constants 
>are global. I guess I've missed something.
>
>Thanks to anyone who can dispel another of my clouds of ignorance.
>
>Graham
>

RR's own constants are global because they are part of the language 
so do speak. As such, they are defined in the engine. That makes them 
a different beast than constant defined in your scripts.

Replicating constant behavior at global level has been discussed 
quite a lot in the past, and not only on this list, but... it is a 
lot more complicated than it seems at first glance. So, for now at 
least, there is no way to make a global behave like a constant 
through declaration. It is up to you to designate some globals as 
global constants, like using a different prefix than for global 
variables.

Robert



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