[antlr-interest] Some ANTLR questions

[Martin Probst]

> 1) UP and DOWN are indicators of tree structure when the output is  
> an AST. There are a few other things like this, depending on your  
> target language too. So, yes you cannot use these. ANTLR3 error  
> checking is a bit lax right now as this will be filled in when  
> ANTLR3 is written in ANTLR3. It becomes "obvious" as you use it  
> right now ;-)

I think this should be changed to something less common. Maybe  
__UP_ANTLR_INT or something similar, something normal users won't run  
into?

Regards,
Martin