diff --git a/js2/src/js2metadata.cpp b/js2/src/js2metadata.cpp
index 1cc91f8e163a..54529cef9d41 100644
--- a/js2/src/js2metadata.cpp
+++ b/js2/src/js2metadata.cpp
@@ -119,6 +119,17 @@ namespace MetaData {
                         defineHoistedVar(env, *v->name, p);
                     }
                     else {
+                        CompoundAttribute *a = Attribute::toCompoundAttribute(attr);
+                        if (a->dynamic || a->prototype)
+                            reportError(Exception::definitionError, "Illegal attribute", p->pos);
+                        MemberModifier memberMod = a->memberMod;
+                        if ((env->getTopFrame()->kind == Frame::Class)
+                                && (memberMod == Attribute::NoModifier))
+                            memberMod == Attribute::Final;
+                        switch (memberMod) {
+                        case Attribute::NoModifier:
+                        case Attribute::Static:
+                        }
                     }
 
                     v = v->next;
@@ -402,6 +413,26 @@ namespace MetaData {
     { 
     }
 
+    CompoundAttribute *Attribute::toCompoundAttribute(Attribute *a)
+    { 
+        if (a) 
+            return a->toCompoundAttribute(); 
+        else
+            return new CompoundAttribute();
+    }
+
+    CompoundAttribute *Namespace::toCompoundAttribute()    
+    { 
+        CompoundAttribute *t = new CompoundAttribute(); 
+        t->addNamespace(this); 
+        return t; 
+    }
+
+    CompoundAttribute *TrueAttribute::toCompoundAttribute()    
+    { 
+        return new CompoundAttribute(); 
+    }
+
 
 
 /************************************************************************************
diff --git a/js2/src/js2metadata.h b/js2/src/js2metadata.h
index 982b87f06403..9ac25678d8b1 100644
--- a/js2/src/js2metadata.h
+++ b/js2/src/js2metadata.h
@@ -53,7 +53,8 @@ class JS2Metadata;
 class JS2Class;
 class StaticBinding;
 class Environment;
-class Context;  
+class Context;
+class CompoundAttribute;
 typedef jsval js2val;
 
 typedef void (Invokable)();
@@ -82,10 +83,10 @@ public:
     Attribute(AttributeKind kind) : kind(kind) { }
 
     static Attribute *combineAttributes(Attribute *a, Attribute *b);
+    static CompoundAttribute *toCompoundAttribute(Attribute *a);
+
+    virtual CompoundAttribute *toCompoundAttribute()    { ASSERT(false); return NULL; }
 
-#ifdef DEBUG
-    virtual void uselessVirtual()   { } // want the checked_cast stuff to work, so need a virtual function
-#endif
 };
 
 // A Namespace (is also an attribute)
@@ -93,6 +94,8 @@ class Namespace : public Attribute {
 public:
     Namespace(StringAtom &name) : Attribute(NamespaceKind), name(name) { }
 
+    virtual CompoundAttribute *toCompoundAttribute();
+
     StringAtom &name;       // The namespace's name used by toString
 };
 
@@ -482,6 +485,7 @@ public:
 class TrueAttribute : public Attribute {
 public:
     TrueAttribute() : Attribute(TrueKind) { }
+    virtual CompoundAttribute *toCompoundAttribute();
 };
 
 // The 'false' attribute
@@ -497,6 +501,8 @@ public:
     CompoundAttribute();
     void addNamespace(Namespace *n);
 
+    virtual CompoundAttribute *toCompoundAttribute()    { return this; }
+
     NamespaceList *namespaces;      // The set of namespaces contained in this attribute
     bool xplicit;                   // true if the explicit attribute has been given
     bool dynamic;                   // true if the dynamic attribute has been given