src/HOL/cladata.ML

--- a/src/HOL/cladata.ML	Wed Nov 12 12:24:55 1997 +0100
+++ b/src/HOL/cladata.ML	Wed Nov 12 12:30:15 1997 +0100
@@ -26,6 +26,9 @@
 structure Hypsubst = HypsubstFun(Hypsubst_Data);
 open Hypsubst;
 
+val thin_refl = prove_goal HOL.thy 
+	"!!X. [|x=x; PROP W|] ==> PROP W" (K [atac 1]);
+
 (*** Applying ClassicalFun to create a classical prover ***)
 structure Classical_Data = 
   struct
@@ -33,7 +36,8 @@
   val mp        = mp
   val not_elim  = notE
   val classical = classical
-  val hyp_subst_tacs=[hyp_subst_tac]
+  val thin_refl = thin_refl
+  val hyp_subst_tacs= [REPEAT_DETERM o ematch_tac [thin_refl] THEN' hyp_subst_tac]
   end;
 
 structure Classical = ClassicalFun(Classical_Data);