No, that is not correct, please look at the WIKI article. The input stream merely MATCHES in upper case, it does NOT change the input stream itself, hence both the keywords and anything else are case preserved when you ask for their text; that is the whole point of doing it that way. Then you specify the tokens in the lexer using upper case only and it has the side effect of simplifying the lexer rules as well as not creating a method call to match every letter of every keyword (which is a bad idea even with JIT inlining).
Jim > -----Original Message----- > From: [email protected] [mailto:antlr-interest- > [email protected]] On Behalf Of Douglas Godfrey > Sent: Monday, June 06, 2011 12:41 PM > To: Marco Hunsicker > Cc: [email protected] > Subject: Re: [antlr-interest] New Guy Question... > > When you implement case insensitive keywords, you may still want case > sensitive identifiers. > If the input stream does case folding, you can't use case sensitive > identifiers. > > On Sun, Jun 5, 2011 at 5:58 PM, Marco Hunsicker <[email protected]> > wrote: > > > > You have to handle case insensitivity the hard way: > > > > > > fragment A > > > : 'A' | 'a'; > > > > > >[...] > > > > I don't think it's a necessity to do it this way. Actually, I think > it > > would be better using a specialized input stream that does any > > necessary transformation. Your mileage may vary ;) > > > > Cheers, > > > > Marco > > > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > > Unsubscribe: > > http://www.antlr.org/mailman/options/antlr-interest/your-email- > address > > > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your- > email-address List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
