--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ZF/ex/Enum.ML Thu Sep 16 12:20:38 1993 +0200
@@ -0,0 +1,33 @@
+(* Title: ZF/ex/enum
+ ID: $Id$
+ Author: Lawrence C Paulson, Cambridge University Computer Laboratory
+ Copyright 1993 University of Cambridge
+
+Example of a BIG enumeration type
+
+Can go up to at least 100 constructors, but it takes over 10 minutes...
+*)
+
+
+(*An enumeration type with 60 contructors! -- takes about 214 seconds!*)
+fun mk_ids a 0 = []
+ | mk_ids a n = a :: mk_ids (bump_string a) (n-1);
+
+val consts = mk_ids "con1" 60;
+
+structure Enum = Datatype_Fun
+ (val thy = Univ.thy;
+ val rec_specs =
+ [("enum", "univ(0)",
+ [(consts, "i")])];
+ val rec_styp = "i";
+ val ext = None
+ val sintrs = map (fn const => const ^ " : enum") consts;
+ val monos = [];
+ val type_intrs = data_typechecks
+ val type_elims = []);
+
+goal Enum.thy "~ con59=con60";
+by (SIMP_TAC (ZF_ss addrews Enum.free_iffs) 1); (*2.3 secs*)
+result();
+