src/jdk.jextract/share/classes/com/sun/tools/jextract/EmptyNameHandler.java

@@ -35,24 +35,27 @@
 import com.sun.tools.jextract.tree.HeaderTree;
 import com.sun.tools.jextract.tree.SimpleTreeVisitor;
 import com.sun.tools.jextract.tree.StructTree;
 import com.sun.tools.jextract.tree.Tree;
 import com.sun.tools.jextract.tree.TreeMaker;
+import com.sun.tools.jextract.tree.TreePhase;
 import com.sun.tools.jextract.tree.TreePrinter;
 import jdk.internal.clang.Cursor;
 
 /**
  * This tree visitor handles the tree empty names encountered in the tree
  * so that subsequent passes need not check tree.name() for empty string.
  *
  * 1. Names are generated & set for anonymous structs & unions.
  * 2. Anonymous (bit) FieldTree instances are removed.
  */
-final class EmptyNameHandler extends SimpleTreeVisitor<Tree, Void> {
+final class EmptyNameHandler extends SimpleTreeVisitor<Tree, Void>
+        implements TreePhase {
     private final TreeMaker treeMaker = new TreeMaker();
 
-    HeaderTree transform(HeaderTree ht) {
+    @Override
+    public HeaderTree transform(HeaderTree ht) {
         return (HeaderTree)ht.accept(this, null);
     }
 
     // generate unique name for an empty name
     private String generateName(Tree tree) {