src/HOL/Statespace/DistinctTreeProver.thy
changeset 58310 91ea607a34d8
parent 58249 180f1b3508ed
child 58889 5b7a9633cfa8
--- a/src/HOL/Statespace/DistinctTreeProver.thy	Thu Sep 11 19:26:59 2014 +0200
+++ b/src/HOL/Statespace/DistinctTreeProver.thy	Thu Sep 11 19:32:36 2014 +0200
@@ -18,7 +18,7 @@
 
 subsection {* The Binary Tree *}
 
-datatype_new 'a tree = Node "'a tree" 'a bool "'a tree" | Tip
+datatype 'a tree = Node "'a tree" 'a bool "'a tree" | Tip
 
 
 text {* The boolean flag in the node marks the content of the node as