[antlr-interest] A question about token bit sets

Hensley, Richard richard.hensley at mckesson.com
Fri Sep 13 08:31:56 PDT 2002


Thanks for the tip about token sets. 

I'm using 2.7.2a2, and I found the syntax predicate bug, so I don't
think the fix is there. 


-----Original Message----- 
From: Ric Klaren [ mailto:klaren at cs.utwente.nl
<mailto:klaren at cs.utwente.nl> ] 
Sent: Friday, September 13, 2002 1:28 AM 
To: antlr-interest at yahoogroups.com 
Subject: Re: [antlr-interest] A question about token bit sets 


On Thu, Sep 12, 2002 at 11:26:42PM -0000, richardhensley99 wrote: 
> I see the following code generated in my Parser classes: 
>     private static final long[] mk_tokenSet_0() { 
>         long[] data = { 32754L, 0L, 0L, 0L }; 
>         return data; 
>     } 
>     public static final BitSet _tokenSet_0 = 
>         new BitSet(mk_tokenSet_0()); 
> What is the best way to tell what tokens are memebers of _tokenSet_0? 

antlr -diagnostic <yourgrammarfile> 

Should give you those I think (in a text file) 

Or alternatively you can turn on C++ codegen, ok it makes no sense but
C++ codegenerator dumps out comments with the contents of the tokensets
these definitions. 



PS I think that predicate bug you stumbled on is fixed in the 2.7.2a
and also in the bugfix devel version on 
    ---- Ric Klaren ----- klaren at cs.utwente.nl ----- +31 53 4893722
  "You know how to use that thing?" [pointing to the sword] 
  "Sure.. The pointy end goes into the other guy." 
  --- The Mask of Zorro 


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