Possible, but probably extremely inefficient. Here's an idea: CL-USER 3 > (ppcre:scan-to-strings "dog|man" "a man and his dog") "man" #() CL-USER 4 > (ppcre:scan-to-strings "dog|man(?!.*dog)" "a man and his dog") "dog" #() Edi. On Wed, Jun 23, 2010 at 4:50 PM, David Johnson-Davies <david@interface.co.uk> wrote:

Is it possible to prioritise matches by the order of the alternatives?

This demonstrates what I want to do:

(cl-ppcre::scan-to-strings "super(man|dog|girl|woman|boy)" "this is the story of superboy and superman.")

This matches "superboy" because it matches the first "super" and then tries each of the ORs until it finds "boy".

What I want it to do is match according to the priority I've specified in the OR list. For example, if it finds a "superman" anywhere in the target-string it should match that before trying "superdog" etc.

I know I could do this with a bit of Lisp code, but if it's possible to keep it all in the regexp I'd prefer to do that.

Thanks, David Johnson-Davies _______________________________________________ cl-ppcre-devel site list cl-ppcre-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/cl-ppcre-devel