Re: RFC 72 (v4) Variable-length lookbehind.

On 30 Sep 2000 19:50:27 -0000, Perl6 RFC Librarian wrote:

>In Perl6, lookbehind in regular expressions should be extended to permit
>not only fixed-length, but also variable-length lookbehind.

I see no mention of negative lookbehind.

As I wrote before, in:

	/(?<!ab*c)x/

The lookbehind should fail if *any* lookbehind string can be found
matching, and not succeed if there's a string to be found that doesn't
match! In the latter case, negative lookbehind would be useless.

-- 
	Bart.