Issue 260 - [Typed objects] Implement type inheritance

lib/typedObjects/utils.js

Index: lib/typedObjects/utils.js
===================================================================
--- a/lib/typedObjects/utils.js
+++ b/lib/typedObjects/utils.js
@@ -86,27 +86,30 @@ let getViewsForType = exports.getViewsFo
   }
   return result;
 };
 
 /**
  * Defines properties with given name and type on an object.
  *
  * @param obj object to define properties on
- * @param propList array of properties where each property is represented by
- *                 [name, type]
+ * @param properties object mapping property names to their respective types
  * @param viewTypes see getViewsForType()
  * @param views see getViewsForType()
  * @param [offset] byte array offset at which the properties should start
  * @return new start offset for additional properties
  */
-exports.defineProperties = function defineProperties(obj, propList, viewTypes, views, offset)
+exports.defineProperties = function defineProperties(obj, properties, viewTypes, views, offset)
 {
   offset = offset | 0;
 
+  let propList = [];
+  for (let name in properties)
+    propList.push([name, properties[name]]);
+
   // Put larger properties first to make sure alignment requirements are met.
   propList.sort(function(a, b)
   {
     return b[1].referenceLength - a[1].referenceLength;
   });
 
   // Generates getters and setters for each property.
   let descriptors = {};