scala specs functional matchers

I was reading http://code.google.com/p/specs/wiki/MatchersGuide and wondered if new matchers could be defined more tersely than:



So here it is, with a couple of implicits:



The example shows how to promote a function to a matcher. Currently I didn't find how to define
a function literal with call-by-name semantics, but for simple matchers where a call-by-value semantic is acceptable this trick works fine.