Hi Patrick, The range operator, `..`, only works in lexer rules, not in parser rules as you're doing. Capitalize the `letter` rule to make it a lexer rule:
grammar failuretest; start: letter+; Letter: 'A' .. 'B'; // or did you mean 'A'..'Z'? and then try again. Regards, Bart. On Sat, Nov 5, 2011 at 1:41 PM, Patrick Zimmermann <patr...@zakweb.de>wrote: > Hello, > > I'm new to this mailing list, so hello everyone. > > I currently try to create a grammar to parse a textual wiki syntax. > I'm using ANTLR 3.4 and the Java generator. > > I've reached a situation where ANTLR creates empty ifs in the generated > Java > code and I boiled it down to the following grammar: > > grammar failuretest; > start: letter+; > letter: 'A' .. 'B'; > > The resulting Java code contains the following statements: > ... > if ( () ) { > ... > if ( ) { > ... > > As far as I know this is no legal Java. And the grammar looks fine to me, > apart > from that the second rule should probably be a lexer rule. > > So could this actually be a bug in antlr? > > > Many thanks in advance, > Patrick Zimmermann > > 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 il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.