src/HOLCF/Cfun3.thy

ex_impE was incorrectly listed as Safe

(*  Title:      HOLCF/cfun3.thy
    ID:         $Id$
    Author:     Franz Regensburger
    Copyright   1993 Technische Universitaet Muenchen

Class instance of  -> for class pcpo

*)

Cfun3 = Cfun2 +

arities "->"    :: (pcpo,pcpo)pcpo              (* Witness cfun2.ML *)

consts  
        Istrictify   :: "('a->'b)=>'a=>'b"
        strictify    :: "('a->'b)->'a->'b"

rules 

inst_cfun_pcpo  "(UU::'a->'b) = UU_cfun"

defs

Istrictify_def  "Istrictify f x == if x=UU then UU else f`x"    

strictify_def   "strictify == (LAM f x.Istrictify f x)"

end