diff -r 8018173a7979 -r b6105462ccd3 src/ZF/ex/Prop.ML
--- a/src/ZF/ex/Prop.ML	Sat Apr 05 16:18:58 2003 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,35 +0,0 @@
-(*  Title: 	ZF/ex/prop.ML
-    ID:         $Id$
-    Author: 	Lawrence C Paulson
-    Copyright   1993  University of Cambridge
-
-Datatype definition of propositional logic formulae and inductive definition
-of the propositional tautologies.
-*)
-
-(*Example of a datatype with mixfix syntax for some constructors*)
-structure Prop = Datatype_Fun
- (val thy = Univ.thy;
-  val thy_name = "Prop";
-  val rec_specs = 
-      [("prop", "univ(0)",
-	  [(["Fls"],	"i",NoSyn),
-	   (["Var"],	"i=>i", Mixfix ("#_", [100], 100)),
-	   (["=>"],	"[i,i]=>i", Infixr 90)])];
-  val rec_styp = "i";
-  val sintrs = 
-	  ["Fls : prop",
-	   "n: nat ==> #n : prop",
-	   "[| p: prop;  q: prop |] ==> p=>q : prop"];
-  val monos = [];
-  val type_intrs = datatype_intrs;
-  val type_elims = []);
-
-val [FlsI,VarI,ImpI] = Prop.intrs;
-
-
-(** Type-checking rules **)
-
-val ImpE = Prop.mk_cases Prop.con_defs "p=>q : prop";
-
-writeln"Reached end of file.";