Issue 260 - [Typed objects] Implement type inheritance

lib/typedObjects/references.js

Index: lib/typedObjects/references.js
===================================================================
--- a/lib/typedObjects/references.js
+++ b/lib/typedObjects/references.js
@@ -16,45 +16,46 @@
  */
 
 "use strict";
 
 let {nextPow2, defineProperties} = require("typedObjects/utils");
 let {uint16, int16, uint32} = require("typedObjects/primitiveTypes");
 let {fixedPropertyDescriptor} = require("typedObjects/utils");
 
-function calculateSize(propList)
+function calculateSize(properties)
 {
   let result = 0;
-  for (let i = 0, l = propList.length | 0; i < l; i++)
-    result += propList[i][1].referenceLength;
-  return nextPow2(result);
+  for (let name in properties)
+    result += properties[name].referenceLength | 0;
+  return nextPow2(result) | 0;
 }
 
-function getViewTypes(propList)
+function getViewTypes(properties)
 {
   let result = [];
-  for (let i = 0, l = propList.length | 0; i < l; i++)
+  for (let name in properties)
   {
-    let requiredViews = propList[i][1].viewTypes;
-    for (let j = 0, ll = requiredViews.length | 0; j < ll; j++)
-      if (result.indexOf(requiredViews[j]) < 0)
-        result.push(requiredViews[j]);
+    let requiredViews = properties[name].viewTypes;
+    for (let i = 0, l = requiredViews.length | 0; i < l; i++)
+      if (result.indexOf(requiredViews[i]) < 0)
+        result.push(requiredViews[i]);
   }
   return result;
 }
 
-let TypedReference_properties = [
-  ["targetBufferIndex", int16],
-  ["targetByteOffset", uint32]
-];
+let TypedReference_properties = {
+  targetBufferIndex: int16,
+  targetByteOffset: uint32
+};
 
-let Reference_properties = [
-  ["typeId", int16]
-].concat(TypedReference_properties);
+let Reference_properties = {
+  __proto__: TypedReference_properties,
+  typeId: int16
+};
 
 /**
  * Helper class to read/write properties referencing other objects. bufferIndex
  * and byteOffset properties of the reference need to be set in order to use it.
  *
  * @param types list of registered object types used to resolve typeId
  * @param views list of views corresponding to Reference.viewTypes
  */