Please re-read the lexer rules, or better still run them. The DOTDOT lexer token type just returns the '..' and not the numbers to either side.
Jim > -----Original Message----- > From: antlr-interest-boun...@antlr.org [mailto:antlr-interest- > boun...@antlr.org] On Behalf Of Fabien Hermenier > Sent: Thursday, November 03, 2011 11:29 PM > To: antlr-interest@antlr.org > Subject: [antlr-interest] about range float and stuff > > Hi > > In an earlier version of my language, I had to parse range of integers > in various base. Now I want to include float. I have read > http://www.antlr.org/wiki/display/ANTLR3/Lexer+grammar+for+floating+poi > nt,+dot,+range,+time+specs > but I've still got some questions. > > All the work seems to be done at the lexer level so the type of the > following tokens will be as example: > 5 : DECIMAL_LITTERAL > 07 : OCTAL_LITTERAL > 7.5: FLOATING_POINT_LITTERAL > 5..7 : DOTDOT > > In the last example, the result is not very convenient because I will > still have to extract the bounds and compute their type by myself which > seems quite redundant with the job performed by the lexer. > May be I am missing something ? > > I would rather be able to express the range at the parser level which > seems much more convenient to me: > range: FLOATING_POINT_LITTERAL DOTDOT FLOATING_POINT_LITTERAL. > In this way, I will also be able to manage the possible spaces between > the bounds and the DOTDOT. > > So, am I right to try to parse range at the parser level ? Or is there > a solution to extract easily the bounds with their type if I am doing > the job at the lexer level ? > > Thanks in advance, > Fabien. > > > > > 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.
