In reply to [email protected] (Trent W. Buck): > Graeme Cross <[email protected]> writes: ... > I do not believe that is possible. AFAICT, this ABNF snippet from RFC > 5322 (p12) is irregular:
My formal-language theory is a bit rusty, but, indeed, you can't recognize context-free languages (having nesting), using regular expressions (even extended with backreferences, as they usually are in practice). -- Smiles, Les. _______________________________________________ luv-main mailing list [email protected] http://lists.luv.asn.au/listinfo/luv-main
