Extract the logic of managed to native marshaling of classes into methods.

src/Generator/Generators/CLI/CLIMarshal.cs

@@ -412,6 +412,36 @@ namespace Cxxi.Generators.CLI
         public bool VisitClassDecl(Class @class)
         {
             if (@class.IsValueType)
+            {
+                MarshalValueClass(@class);
+            }
+            else
+            {
+                if (MarshalRefClass()) return true;
+            }
+
+            return true;
+        }
+
+        private bool MarshalRefClass()
+        {
+            if (!Context.Parameter.Type.IsPointer())
+                Return.Write("*");
+
+            var method = Context.Function as Method;
+            if (method != null
+                && method.Conversion == MethodConversionKind.FunctionToInstanceMethod
+                && Context.ParameterIndex == 0)
+            {
+                Return.Write("NativePtr");
+                return true;
+            }
+
+            Return.Write("{0}->NativePtr", Context.Parameter.Name);
+            return false;
+        }
+
+        private void MarshalValueClass(Class @class)
         {
             if (Context.Parameter.Type.IsReference())
             {
@@ -433,7 +463,7 @@ namespace Cxxi.Generators.CLI
                     var fieldRef = string.Format("{0}.{1}", Context.Parameter.Name,
                                                  field.Name);
 
-                        var marshalCtx = new MarshalContext() { ArgName = fieldRef };
+                    var marshalCtx = new MarshalContext() {ArgName = fieldRef};
                     var marshal = new CLIMarshalManagedToNativePrinter(TypeMapDatabase,
                                                                        marshalCtx);
                     field.Visit(marshal);
@@ -447,25 +477,6 @@ namespace Cxxi.Generators.CLI
                     ArgumentPrefix.Write("&");
             }
         }
-            else
-            {
-                if (!Context.Parameter.Type.IsPointer())
-                    Return.Write("*");
-
-                var method = Context.Function as Method;
-                if (method != null
-                    && method.Conversion == MethodConversionKind.FunctionToInstanceMethod
-                    && Context.ParameterIndex == 0)
-                {
-                    Return.Write("NativePtr");
-                    return true;
-                }
-
-                Return.Write("{0}->NativePtr", Context.Parameter.Name);
-            }
-
-            return true;
-        }
 
         public bool VisitFieldDecl(Field field)
         {