On Tue, Sep 6, 2011 at 7:13 AM, Erel Segal <erel...@gmail.com> wrote:
> ANTLR parsers normally work in a single direction - they get an input > document and return some information related to it (e.g. the parse tree). > Is > it possible to create, using the same grammar, a generator that will work > in > the opposite direction - get the information and return the original > document? > > To illustrate what I mean, here is a simple grammar, with a single rule: > > question returns [String issue] > : 'What are your salary demands?' {$issue="Salary";} > | 'What would you like as your job description?' {$issue="Job > Description";} > | 'Do you demand a company car?' {$issue="Leased Car";} > ; > > If I create a parser from this grammar, run it on a stream that contains > "What > are your salary demands?", and call its question() method, it will return > "Salary". > > I would like to be able to do the opposite - send "Salary" as input, and > get > "What are your salary demands?" as output, but use the same grammar for > both > tasks. > > Is this possible with ANTLR? > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: > http://www.antlr.org/mailman/options/antlr-interest/your-email-address > I don't know how this could be done in ANTLR, but PROLOG should work. Eric 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.