Index: src/main/org/codehaus/groovy/classgen/ExtendedVerifier.java
===================================================================
--- src/main/org/codehaus/groovy/classgen/ExtendedVerifier.java	(revision 16713)
+++ src/main/org/codehaus/groovy/classgen/ExtendedVerifier.java	Fri Jun 19 12:15:37 EST 2009
@@ -24,6 +24,7 @@
 import org.codehaus.groovy.control.SourceUnit;
 import org.codehaus.groovy.control.messages.SyntaxErrorMessage;
 import org.codehaus.groovy.syntax.SyntaxException;
+import org.objectweb.asm.Opcodes;
 
 /**
  * A specialized Groovy AST visitor meant to perform additional verifications upon the
@@ -117,9 +118,26 @@
                         + " is not allowed on element " + AnnotationNode.targetToName(target),
                         visited);
             }
+            visitDeprecation(node, visited);
         }
     }
 
+    private void visitDeprecation(AnnotatedNode node, AnnotationNode visited) {
+        if (visited.getClassNode().getTypeClass() == Deprecated.class) {
+            // TODO addWarning? or set flag to indicate we found a deprecated class?
+            if (node instanceof MethodNode) {
+                MethodNode mn = (MethodNode) node;
+                mn.setModifiers(mn.getModifiers() | Opcodes.ACC_DEPRECATED);
+            } else if (node instanceof FieldNode) {
+                FieldNode fn = (FieldNode) node;
+                fn.setModifiers(fn.getModifiers() | Opcodes.ACC_DEPRECATED);
+            } else if (node instanceof ClassNode) {
+                ClassNode cn = (ClassNode) node;
+                cn.setModifiers(cn.getModifiers() | Opcodes.ACC_DEPRECATED);
+            }
+        }
+    }
+
     /**
      * Resolve metadata and details of the annotation.
      *
Index: src/main/org/codehaus/groovy/ast/ClassNode.java
===================================================================
--- src/main/org/codehaus/groovy/ast/ClassNode.java	(revision 16296)
+++ src/main/org/codehaus/groovy/ast/ClassNode.java	Fri Jun 19 12:15:37 EST 2009
@@ -123,7 +123,7 @@
     public static ClassNode SUPER = new ClassNode(Object.class);
 
     private String name;
-    private final int modifiers;
+    private int modifiers;
     private ClassNode[] interfaces;
     private MixinNode[] mixins;
     private List<ConstructorNode> constructors = new ArrayList<ConstructorNode>();
@@ -450,6 +450,10 @@
         return redirect().modifiers;
     }
 
+    public void setModifiers(int modifiers) {
+        this.modifiers = modifiers;
+    }
+
     public List<PropertyNode> getProperties() {
         return redirect().properties;
     }