simplify define property by using a helper in playground object getter memoization

lib/6to5/transformation/transformers/playground-object-getter-memoization.js

@@ -3,7 +3,7 @@ var util     = require("../../util");
 var t        = require("../../types");
 
 exports.Property =
-exports.MethodDefinition = function (node) {
+exports.MethodDefinition = function (node, parent, file) {
   if (node.kind !== "memo") return;
   node.kind = "get";
 
@@ -21,10 +21,11 @@ exports.MethodDefinition = function (node) {
       if (t.isFunction(node)) return;
 
       if (t.isReturnStatement(node) && node.argument) {
-        node.argument = t.memberExpression(util.template("object-getter-memoization", {
-          KEY: key,
-          VALUE: node.argument
-        }), key, true);
+        node.argument = t.memberExpression(t.callExpression(file.addDeclaration("define-property"), [
+          t.thisExpression(),
+          key,
+          node.argument
+        ]), key, true);
       }
     }
   });

test/fixtures/transformation/playground/object-getter-memoization/expected.js

@@ -5,60 +5,24 @@ var _prototypeProperties = function (child, staticProps, instanceProps) {
   if (instanceProps) Object.defineProperties(child.prototype, instanceProps);
 };
 
+var _defineProperty = function (obj, key, value) {
+  return Object.defineProperty(obj, key, {
+    value: value,
+    enumerable: true,
+    configurable: true,
+    writable: true
+  });
+};
+
 var Foo = function Foo() {};
 
-_prototypeProperties(Foo, null, (function (_ref) {
-  _ref[bar] = {
-    get: function () {
-      return Object.defineProperty(this, bar, {
-        enumerable: true,
-        configurable: true,
-        writable: true,
-        value: complex()
-      })[bar];
-    },
-    enumerable: true
-  };
-  return _ref;
-})({
-  bar: {
-    get: function () {
-      return Object.defineProperty(this, "bar", {
-        enumerable: true,
-        configurable: true,
-        writable: true,
-        value: complex()
-      }).bar;
-    },
-    enumerable: true
-  }
+_prototypeProperties(Foo, null, _defineProperty({}, bar, {
+  get: function () {
+    return _defineProperty(this, bar, complex())[bar];
+  },
+  enumerable: true
 }));
 
-var foo = (function (_foo) {
-  _foo[bar] = function () {
-    return Object.defineProperty(this, bar, {
-      enumerable: true,
-      configurable: true,
-      writable: true,
-      value: complex()
-    })[bar];
-  };
-
-  return _foo;
-})((function (_ref2) {
-  Object.defineProperties(_ref2, {
-    bar: {
-      get: function () {
-        return Object.defineProperty(this, "bar", {
-          enumerable: true,
-          configurable: true,
-          writable: true,
-          value: complex()
-        }).bar;
-      },
-      enumerable: true
-    }
-  });
-
-  return _ref2;
-})({}));
+var foo = _defineProperty({}, bar, function () {
+  return _defineProperty(this, bar, complex())[bar];
+});