1 files changed, 34 insertions, 0 deletions
diff --git a/sources/scalac/ast/printer/TreePrinter.java b/sources/scalac/ast/printer/TreePrinter.java
new file mode 100644
index 0000000000..059b335c72
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+++ b/sources/scalac/ast/printer/TreePrinter.java
@@ -0,0 +1,34 @@
+/*     ____ ____  ____ ____  ______                                     *\
+**    / __// __ \/ __// __ \/ ____/    SOcos COmpiles Scala             **
+**  __\_ \/ /_/ / /__/ /_/ /\_ \       (c) 2002, LAMP/EPFL              **
+** /_____/\____/\___/\____/____/                                        **
+\*                                                                      */
+
+// $Id$
+
+package scalac.ast.printer;
+
+import java.io.OutputStream;
+
+import scalac.Unit;
+import scalac.ast.Tree;
+
+/**
+ * Interface for all abstract tree printers.
+ *
+ * @author Michel Schinz
+ * @version 1.0
+ */
+public interface TreePrinter {
+    public void begin();
+    public void end();
+    public void flush();
+
+    public void beginSection(int level, String title);
+
+    public void print(Unit unit);
+
+    public TreePrinter print(Tree tree);
+    public TreePrinter print(String str);
+    public TreePrinter println();
+}