MANY THX; The problem is solved thanks to the information you gave me. Kind regards,
Marouane 2009/5/4 Jim Idle <j...@temporal-wave.com>: > Marwan Ajraoui wrote: >> Hi There; >> >> I'm currently defining a grammar for a based tag language using ANTLR; >> The problem I'm facing is that a single digit doesn't match my defined >> rule INTEGER, here is the definition I put (as i saw in The Definitive >> guide of ANTLR): >> >> DIGITO: '0'..'9' ; >> INT : DIGITO + ; >> >> This rule should match any digit, but does match only numbers that are >> composed of tow or more digits, like 45, 0567, etc. Numbers as 0, 7 or >> 5 doesn't match. >> >> I will be gratefull, if you give me any issue about it; >> > You probably are best reading through the example grammars to get a full > understanding, but here both of your lexer rules can match digits so the > best ANTLR can do is realize that INT is selected when there are more > than one DIGITs because DIGIT0 can only match 1 digit. > > You cannot have two rules that match the same thing basically. When you > want to use a rule as sort of 'subroutine' that does not create any > tokens itself, then you need to mark it as a fragment. Then it will > generate code that can be called by other rules but will not try and > create tokens itself. > > fragment DIGITO: '0'..'9' ; > INT : DIGITO + ; > > > Jim > > > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: > http://www.antlr.org/mailman/options/antlr-interest/your-email-address > -- Marouane 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-interest@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 -~----------~----~----~----~------~----~------~--~---
