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 Eckhart
