Added an IMangledDecl interface to mangle-able declarations.

src/Bridge/Declaration.cs

@@ -20,6 +20,11 @@ namespace CppSharp
         string Name { get; set; }
     }
 
+    public interface IMangledDecl
+    {
+        string Mangled { get; set; }
+    }
+
     [Flags]
     public enum IgnoreFlags
     {

src/Bridge/Function.cs

@@ -55,7 +55,7 @@ namespace CppSharp
         }
     }
 
-    public class Function : Declaration, ITypedDecl
+    public class Function : Declaration, ITypedDecl, IMangledDecl
     {
         public Function()
         {
@@ -101,7 +101,6 @@ namespace CppSharp
             }
         }
 
-        // Mangled name
         public string Mangled { get; set; }
         
         public override T Visit<T>(IDeclVisitor<T> visitor)

src/Bridge/Variable.cs

@@ -1,7 +1,7 @@
 
 namespace CppSharp
 {
-    public class Variable : Declaration, ITypedDecl
+    public class Variable : Declaration, ITypedDecl, IMangledDecl
     {
         public override T Visit<T>(IDeclVisitor<T> visitor)
         {