Patrik (>): >> I find nothing in the spec that addresses this case specifically. > > From the spec: > > The new :s (:sigspace) modifier causes whitespace sequences to be > considered "significant"; they are replaced by a whitespace matching > rule, <.ws> > > I can't find any exception to this rule. Therefore, as I read it, > every whitespace should be replaced by <.ws>.
The rule about empty (sub-)regexes being illegal is applied before the rule about everywhitespace being replaced by <.ws>. It doesn't matter whether :sigspace is on or not: nothing is always illegal. // Carl
