From: isis-tech_at_[hidden]
Date: 2001-05-26 21:26:52
> }
> } But this can be done in Spirit:
> }
> } ((a|b) - abb) >> abb
> }
> } Spirit's EBNF syntax has the &, -, and ^ which are
> } very powerful set operators missing in other EBNF
> } dialects.
>
> ...but that isn't the same language. aabbababb is (should be)
accepted by
> the first expression and (if I understand your notation) will not be
> accepted by the EBNF version.
>
> } Cheers,
> } Joel de Guzman
> --Greg
For some reason I am not receiving boost posts. Anyway.
OK, how about this spirit code:
ChLit<> a('a');
ChLit<> b('b');
Rule<> abb = a >> b >> b;
Rule<> abbend = a >> b >> b >> '\0';
Rule<> r = *((a|b) - abbend) >> abb;
"aabbababb" parses OK
Joel de Guzman