Re: [Chicken-users] Regex help.

[Matthew Welland]

Thanks. It didn't help that I was not getting the compile error:

csi> (define r (regexp "^\\(.*)\\s*$"))
csi>

This is what I actually wanted:

(define esc-regex  (regexp "^\\\\([^\\s]+)\\s*$"))

Thanks

On Saturday 01 March 2008 04:32:46 am Peter Bex wrote:
> On Sat, Mar 01, 2008 at 04:21:16AM -0700, Matthew Welland wrote:
> > What am I not getting here?
> >
> > DB<1> "\\foo "=~m/^\\(.*) $/;print $1;
> > foo
> >
> > irb> "\\foo ".match(/^\\(.*)\s*$/);puts $1
> > foo
> >
> > csi> (string-match (regexp "^\\(.*)\\s*$") "\\foo ")
> > #f
>
> It tells me
> Error: (regexp) cannot compile regular expression - unmatched parentheses
>
> In chicken, you're doing the equivalent of Ruby's
> "\\foo ".match(/^\(.*)\s*$/)
>
> So, to get two backslashes in the string, use four of them;
> one to escape the first, one to escape the second, resulting in
> two backslashes which count for the regex as one escaped backslash.
>
> #;2> (string-match (regexp "^\\\\(.*)\\s*$") "\\foo ")
> ("\\foo " "foo ")
>
> HTH,
> Peter



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