[antlr-interest] $FIRST $FOLLOW

Terence Parr parrt at cs.usfca.edu
Tue Feb 7 10:32:09 PST 2006


On Feb 7, 2006, at 6:10 AM, Ulrich Frank wrote:
> So how can I realize this?? I know I have to access  $FIRST and  
> $FOLLOW respectively which is accessible in the grammar file. But I  
> firstly need this information in the main java class where i create  
> a parser object and my gui and secondly I do not need the BitSet (= 
> $FIRST,$FOLLOW) but the names of the Tokens (Symbols), ATTR_ID f.e.  
> When I'm right, i can get the last thing by matching it with the  
> entries in the ...TokenTypes.txt file but isn't there a better/ 
> faster way?

I think there might be a toString() method for bitset that takes a  
token names table, which is in every generated parser.

Ter


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