any way to get the uri path part that matches $r->location?

In Apache2::Controller the dispatch mechanism gets the URI into a variable, then removes $r->location from the start of it to get the remaining parts of the path, to determine which controller method to invoke.

This works for <Location> conf but not <LocationMatch>, because $r->location reports the string from the config block instead of the part of the path that matched it.  If that is a weird pattern, then it is not found in the literal URI.

Is there a way to get at what part of the URI matched the <Location> or <LocationMatch> directive?

Thanks.

Mark