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src/HOL/HOL.thy
changeset 39566 87a5704673f0
parent 39471 55e0ff582fa4
child 39715 9094200d7988
child 39719 b876d7525e72 
--- a/src/HOL/HOL.thy	Mon Sep 20 15:25:32 2010 +0200
+++ b/src/HOL/HOL.thy	Mon Sep 20 18:43:18 2010 +0200
@@ -742,7 +742,7 @@
   then show False by (rule notE)
 qed
 
-lemma atomize_eq [atomize]: "(x == y) == Trueprop (x = y)"
+lemma atomize_eq [atomize, code]: "(x == y) == Trueprop (x = y)"
 proof
   assume "x == y"
   show "x = y" by (unfold `x == y`) (rule refl)
isabelle