diff --git a/src/AST/Function.cs b/src/AST/Function.cs
index f509a9ab..fc01d9b8 100644
--- a/src/AST/Function.cs
+++ b/src/AST/Function.cs
@@ -93,7 +93,8 @@ namespace CppSharp.AST
         None,
         ComplementOperator,
         AbstractImplCall,
-        DefaultValueOverload
+        DefaultValueOverload,
+        InterfaceInstance
     }
 
     public class Function : Declaration, ITypedDecl, IMangledDecl
diff --git a/src/AST/Property.cs b/src/AST/Property.cs
index a5524f3a..0b530cd2 100644
--- a/src/AST/Property.cs
+++ b/src/AST/Property.cs
@@ -115,6 +115,11 @@ namespace CppSharp.AST
             }
         }
 
+        public bool IsSynthetized
+        {
+            get { return GetMethod != null && GetMethod.IsSynthetized; }
+        }
+
         public override T Visit<T>(IDeclVisitor<T> visitor)
         {
             return visitor.VisitProperty(this);
diff --git a/src/Generator/Passes/CleanInvalidDeclNamesPass.cs b/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
index 113b871f..70ecfc9b 100644
--- a/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
+++ b/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
@@ -35,7 +35,7 @@ namespace CppSharp.Passes
             // types with empty names are assumed to be private
             if (decl is Class && string.IsNullOrWhiteSpace(decl.Name))
             {
-                decl.Name = "_";
+                decl.Name = decl.Namespace.Name == "_" ? "__" : "_";
                 decl.ExplicitlyIgnore();
                 return false;
             }
diff --git a/src/Generator/Passes/GetterSetterToPropertyAdvancedPass.cs b/src/Generator/Passes/GetterSetterToPropertyAdvancedPass.cs
index 899b86dd..bcfc44e9 100644
--- a/src/Generator/Passes/GetterSetterToPropertyAdvancedPass.cs
+++ b/src/Generator/Passes/GetterSetterToPropertyAdvancedPass.cs
@@ -271,17 +271,14 @@ namespace CppSharp.Passes
         public GetterSetterToPropertyAdvancedPass()
         {
             Options.VisitClassProperties = false;
+            Options.VisitFunctionParameters = false;
         }
 
         public override bool VisitClassDecl(Class @class)
         {
-            if (!AlreadyVisited(@class))
+            if (base.VisitClassDecl(@class))
             {
-                bool result = base.VisitClassDecl(@class);
-
                 new PropertyGenerator(@class, Log).GenerateProperties();
-
-                return result;
             }
             return false;
         }
diff --git a/src/Generator/Passes/MultipleInheritancePass.cs b/src/Generator/Passes/MultipleInheritancePass.cs
index edfd4469..23bd1ee7 100644
--- a/src/Generator/Passes/MultipleInheritancePass.cs
+++ b/src/Generator/Passes/MultipleInheritancePass.cs
@@ -84,7 +84,11 @@ namespace CppSharp.Passes
                 instance.Namespace = @interface;
                 instance.Name = Helpers.InstanceIdentifier;
                 instance.QualifiedType = new QualifiedType(new BuiltinType(PrimitiveType.IntPtr));
-                instance.GetMethod = new Method { Namespace = @interface };
+                instance.GetMethod = new Method
+                {
+                    SynthKind = FunctionSynthKind.InterfaceInstance,
+                    Namespace = @interface
+                };
                 @interface.Properties.Add(instance);
             }
 
diff --git a/tests/Basic/Basic.h b/tests/Basic/Basic.h
index a3c0bf42..7627f08e 100644
--- a/tests/Basic/Basic.h
+++ b/tests/Basic/Basic.h
@@ -561,3 +561,13 @@ public:
 };
 
 DLL_API void va_listFunction(va_list v);
+
+struct DLL_API TestEmptyName
+{
+    struct
+    {
+        struct
+        {
+        };
+    };
+};