in reply to Re: With Unicode, \d is wrong if you mean [0-9]in thread Regex help
Hmm, if you want to add one to it, it probably wants to consist of [0-9]+ rather than \d+.
Patches welcome. :)
If anything, I think I'd rather see things like grok_number() become hooks so you can intercept them, whether to augment, replace, or just add:
warn "Hey, scare's over now, you can go back to 2 digits"
if $num =~ /^20\d\d\z/;
Of course we probably don't reach grok_number() unless the lexer has already spotted a digit, so we'd need hot-pluggable grammars as well.