nice alias function definitions

lib/6to5/transformers/_alias-functions.js

@@ -17,7 +17,8 @@ var go = function (getBody, node, file) {
   // traverse the function and find all alias functions so we can alias
   // arguments and this if neccesary
   traverse(node, function (node) {
-    if (!node._aliasFunction) {
+    var _aliasFunction = node._aliasFunction;
+    if (!_aliasFunction) {
       if (traverse.isFunction(node)) {
         // stop traversal of this node as it'll be hit again by this transformer
         return false;
@@ -39,7 +40,7 @@ var go = function (getBody, node, file) {
       }
 
       if (util.isReferenced(node, parent)) return getId();
-    }, node._aliasFunctionStopNonArrowFunctions && ["FunctionExpression", "FunctionDeclaration"]);
+    }, _aliasFunction === "arrows" && ["FunctionExpression", "FunctionDeclaration"]);
 
     return false;
   });

lib/6to5/transformers/arrow-functions.js

@@ -3,8 +3,7 @@ var util = require("../util");
 exports.ArrowFunctionExpression = function (node) {
   util.ensureBlock(node);
 
-  node._aliasFunction = true;
-  node._aliasFunctionStopNonArrowFunctions = true;
+  node._aliasFunction = "arrows";
   node.expression = false;
   node.type = "FunctionExpression";
 

lib/6to5/transformers/computed-property-names.js

@@ -44,8 +44,7 @@ exports.ObjectExpression = function (node, parent, file) {
   var containerCallee = container.callee;
   var containerBody = containerCallee.body.body;
 
-  containerCallee._aliasFunction = true;
-  containerCallee._aliasFunctionStopNonArrowFunctions = true;
+  containerCallee._aliasFunction = "arrows";
 
   _.each(computed, function (prop) {
     containerBody.unshift(util.template("obj-key-set", {