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Postings from May 2005
On May 24, Jonathan Scott Duff said: > On Tue, May 24, 2005 at 08:25:03PM -0400, Jeff 'japhy' Pinyan wrote: >> http://japhy.perlmonk.org/perl6/rules.txt > > That looks completish to me. (At least I didn't think, "hey! where's > such and such?") Oh, frabjous day! > One thing that I noticed and had to look up was > > <-prop X> > > though. Because ... I wish <!prop X> was allowed. I don't see why <!...> has to be confined to zero-width assertions. >> The part which needs a bit of clarification right now, in my opinion, is >> character classes. From what I can gather, these are character classes: >> >> <[a-z] +<digit>> >> <+<alpha> -[aeiouAEIOU]> > > I believe that Larry blessed Pm's idea to allow > > <[a..z]+digit> > <+alpha-[aeiouAEIOU]> Ok, that's news to me. (I have yet to peruse the archives.) That's nice, not requiring you to <>-ize property names inside a character class assertion. I'd think whitespace would be permitted in between parts of a character class, but perhaps I'm wrong. That would kinda go against the whole "whitespace for readability" idea of Perl 6 rules, though. > which implies to me that assertions starting with one of "<[", > "<-" or "<+" should be treated as character classes. This doesn't > seem to play well with <-prop X>. Maybe it does though. Considering the Unicode properties are like char class macro-things (like \w and \d), I don't see a problem, except for the fact that there's more than one "word" (chunk of non-whitespace) associated with them. Maybe Unicode properties retain their enclosing <>'s? > Also, I think that it's [a..z] now rather than [a-z] but I'm not > entirely sure. At least that's how PGE implements it. Ok. I'll wait for a message from On High about that. It's a minor detail. >> but I want to be sure. I'm also curious about whitespace. Is "<[" one >> token, or can I write "< [a-z] >" and have it be a character class? > > I think you need to write "<[" I expected as much. -- Jeff "japhy" Pinyan % How can we ever be the sold short or RPI Acacia Brother #734 % the cheated, we who for every service http://japhy.perlmonk.org/ % have long ago been overpaid? http://www.perlmonks.org/ % -- Meister EckhartThread Previous | Thread Next