On Thu, Jan 31, 2002 at 05:15:49PM +0000, Graham Barr wrote: > > Yes, I was assuming that. However what is to be gained by case > folding the input string ? > > Because parts of an rx can be case-insensitive while other parts > are case-sensitive, we will probably need two sorts of ops anyway > (or a way to tell the op to be case-insensitive). And you will > only be able to do the case folding when the whole rx is case-insensitive.
(Two sorts of ops makes most sense to me as the case-insensitive op will need to know about fiddly charset conversion stuff whereas the case-sensitive can just work with the list-of-integers abstraction.) > It also means creating a copy of the input string, which is something > the current rx engine in perl5 tries to avoid. And while I will agree > that it is often faster todo lc($str) =~ /.../ than $str =~ /.../i > that is normally only the case for small-ish strings. Agreed on all counts. Especially as the perl6 rx engine will have to be able to work directly on non-trivial things like streams and generators ans suchlike. Tim [who's not really paying attention].
