On Thu, Sep 29, 2005 at 09:21:40AM -0700, Dave Whipp wrote: > Luke Palmer wrote: > > >Joked? Every other language that has pattern matching signatures that > >I know of (that is, ML family and Prolog) uses _. Why should we break > >that? IMO, it's immediately obvious what it means. > > > >Something tells me that in signature unification, "undef" means "this > >has to be undef", much like "1" means "this has to be 1". > > In Perl6 we currently have at least tw oways to say "don't care": In a > regex, we say /./ to match anything; in a type signature, we use "Any" > to mean that we don't care what the type is. I don't think we need > another way to say "don't care". In fact, we could unify things: > > rules: /<Any>/ matches anything (/./ is shorthand synonym)
Is that strictly correct? /./ doesn't match an empty string. Or did I miss some context earlier in the thread? Nicholas Clark
