A new approach, using simp_of_act and simp_of_set to activate definitions when
necessary
(* Title: HOLCF/Discrete.thy
ID: $Id$
Author: Tobias Nipkow
Copyright 1997 TUM
Discrete CPOs
*)
Discrete = Discrete1 +
instance discr :: (term)cpo (discr_cpo)
constdefs
undiscr :: ('a::term)discr => 'a
"undiscr x == (case x of Discr y => y)"
end