Yes, it takes quite a bit of practise, but you will find a great help in Terence Parr's books.
See the links below. http://pragprog.com/titles/tpantlr/the-definitive-antlr-reference http://pragprog.com/titles/tpdsl/language-implementation-patterns Best regards, Ranco ________________________________________ From: [email protected] [[email protected]] on behalf of P.N. [[email protected]] Sent: Tuesday, June 07, 2011 11:07 AM To: [email protected] Subject: Re: [antlr-interest] error(208) Thank You, works great now! I'm not used to writing parsers and/or lexers, so I'm still confusing about it. Kind regards Peter Ranco Marcus schrieb: > Hello Peter, > > You should probably change the name of rule PV to lowercase pv, because it is > a parser rule and not a lexer rule. > > Best regards, > > Ranco > > ________________________________________ > From: [email protected] [[email protected]] on > behalf of P.N. [[email protected]] > Sent: Tuesday, June 07, 2011 10:32 AM > To: [email protected] > Subject: [antlr-interest] error(208) > > Hello! > > Using the following rules for grammar (ESC_SEQ defined as fragment): > > root : object; > object : '{' props '}'; > props : prop (',' prop)*; > prop : ID ('=' PV | '+' | '-'); > PV : STRING | object | INT; > ID : ('a'..'z'|'A'..'Z') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*; > INT : '0' | ('1'..'9') ('0'..'9')*; > WS : (' '|'\t'|'\r'|'\n') {$channel=HIDDEN;}; > STRING : '"' (ESC_SEQ | ~('\\'|'"'))* '"'; > > When I try to generate the Java code, the following error message is shown: > "error(208): The following token definitions can never be matched > because prior tokens match the same input: INT,STRING" > > Why do I get this message, as every lexical rule has its own starting > character? > > Kind regards > > Peter > > > 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 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.
