Re: regexp confusion

On Sun, 7 Dec 2003, Jack Tanner wrote:
> I can't tell if this is a bug or not. I'm using ACL 6.2
> with all recent patches applied.
>
> CL-USER(19): (match-regexp "^[0-9 ,]*$" "4, 7")
> T
> "4, 7"
> CL-USER(21): (match-regexp "^[0-9\\b,]*$" "4, 7")
> NIL
>
> The only difference is that in the regexp, I substitute a space for \\b,
> and all of a sudden the string matches. Isn't \\b supposed to be a
> catch-all for all kinds of whitespace?

   You are putting "\b" in a char class where it is being
taken as the chars #\\ and #\b.  Outside of a char class
"\b" will be interperted as matching whitespace.

harley.