1 files changed, 30 insertions, 0 deletions
diff --git a/sources/scalac/ast/AbstractTreeCopyFactory.java b/sources/scalac/ast/AbstractTreeCopyFactory.java
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+++ b/sources/scalac/ast/AbstractTreeCopyFactory.java
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+/*     ____ ____  ____ ____  ______                                     *\
+**    / __// __ \/ __// __ \/ ____/    SOcos COmpiles Scala             **
+**  __\_ \/ /_/ / /__/ /_/ /\_ \       (c) 2002, LAMP/EPFL              **
+** /_____/\____/\___/\____/____/                                        **
+**                                                                      **
+\*                                                                      */
+
+// $Id$
+
+package scalac.ast;
+
+import scalac.ast.*;
+
+/**
+ * Abstract superclass for all TreeCopyFactories, which provides only
+ * the code to copy the attribution from the "old" to the "new" tree.
+ *
+ * @author Michel Schinz
+ * @version 1.0
+ */
+
+public abstract class AbstractTreeCopyFactory implements TreeCopyFactory {
+    public void attribute(Tree newTree, Tree oldTree) {
+        if (newTree != oldTree) {
+            newTree.type = oldTree.type;
+            if (newTree.hasSymbol())
+                newTree.setSymbol(oldTree.symbol());
+        }
+    }
+}