[antlr-interest] NoViableAltException.expecting ?

[Terence Parr]

On Nov 16, 2005, at 11:02 AM, Sebastien Boving wrote:
> why can't you generate
>
>  antlr.NoViableAltException(self.LT(1).self.getFilename(),  
> [LITERAL_show, LITERAL_no, LITERAL_set])
>
> to be raised instead?  ANTLR should be able to build this list as  
> it just constructed the flow control displayed above the error  
> handling, right?

Well, ANTLR can figure out the LL(1) FIRST set of course but it will  
not always makes sense:

a : A B
   | A C
  ;

upon A D you'd get "missing A" found A. ;)

I'm just saying it's not obvious what you want and it wasn't  
convenient to generate this when I was doing it so I left it out.   
Sorry about that...lots of little holes like that.  Trivial to add to  
new system.  Bug me in a few months when I get back to error stuff.

Ter