diff -r 000000000000 -r a5a9c433f639 src/CCL/ex/Flag.ML
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/CCL/ex/Flag.ML	Thu Sep 16 12:20:38 1993 +0200
@@ -0,0 +1,46 @@
+(*  Title: 	CCL/ex/flag
+    ID:         $Id$
+    Author: 	Martin Coen, Cambridge University Computer Laboratory
+    Copyright   1993  University of Cambridge
+
+For flag.thy.
+*)
+
+open Flag;
+
+(******)
+
+val flag_defs = [Colour_def,red_def,white_def,blue_def,ccase_def];
+
+(******)
+
+val ColourXH = mk_XH_tac Flag.thy (simp_type_defs @flag_defs) [] 
+          "a : Colour <-> (a=red | a=white | a=blue)";
+
+val Colour_case = XH_to_E ColourXH;
+
+val redT = mk_canT_tac Flag.thy [ColourXH] "red : Colour";
+val whiteT = mk_canT_tac Flag.thy [ColourXH] "white : Colour";
+val blueT = mk_canT_tac Flag.thy [ColourXH] "blue : Colour";
+
+
+val ccaseT = mk_ncanT_tac Flag.thy flag_defs case_rls case_rls
+     "[| c:Colour; \
+\        c=red ==> r : C(red); c=white ==> w : C(white); c=blue ==> b : C(blue) |] ==> \
+\     ccase(c,r,w,b) : C(c)";
+
+(***)
+
+val prems = goalw Flag.thy [flag_def]
+    "flag : List(Colour)->List(Colour)*List(Colour)*List(Colour)";
+by (typechk_tac [redT,whiteT,blueT,ccaseT] 1);
+by clean_ccs_tac;
+be (ListPRI RS (ListPR_wf RS wfI)) 1;
+ba 1;
+result();
+
+
+val prems = goalw Flag.thy [flag_def]
+    "flag : PROD l:List(Colour).{x:List(Colour)*List(Colour)*List(Colour).FLAG(x,l)}";
+by (gen_ccs_tac [redT,whiteT,blueT,ccaseT] 1);
+by (REPEAT_SOME (ares_tac [ListPRI RS (ListPR_wf RS wfI)]));