fix static member expression calls, make classes more spec-compliant

lib/6to5/templates/class.js

@@ -1,7 +1,7 @@
 (function () {
-  function CLASS_NAME() {
+  var CLASS_NAME = function CLASS_NAME() {
 
-  }
+  };
 
   return CLASS_NAME;
 })()

lib/6to5/transformers/classes.js

@@ -22,7 +22,19 @@ var getMemberExpressionObject = function (node) {
 
 var buildClass = function (node, generateUid) {
   var superName = node.superClass;
-  var className = node.id || b.identifier("Anonymous");
+  var className = node.id;
+
+  if (superName) {
+    if (superName.type === "Literal" && superName.value === null) {
+      superName = null;
+    }
+  }
+
+  var noName = false;
+  if (!className) {
+    className = b.identifier(generateUid("_class"));
+    noName = true;
+  }
 
   var superClassArgument = node.superClass;
   var superClassCallee   = node.superClass;
@@ -43,6 +55,10 @@ var buildClass = function (node, generateUid) {
   var block     = container.callee.body;
   var body      = block.body;
 
+  if (noName) {
+    body[0].declarations[0].init.id = null;
+  }
+
   var returnStatement = body.pop();
 
   if (superName) {
@@ -74,7 +90,7 @@ var buildClassBody = function (body, className, superName, node) {
   var staticMutatorMap   = {};
   var hasConstructor     = false;
 
-  var construct = body[0];
+  var construct = body[0].declarations[0].init;
   var classBody = node.body.body;
 
   _.each(classBody, function (node) {
@@ -145,7 +161,7 @@ var superIdentifier = function (superName, methodNode, methodName, node, parent)
       node = b.memberExpression(node, b.identifier(methodName), false);
       return b.memberExpression(node, b.identifier("call"), false);
     }
-  } else if (parent.type === "MemberExpression") {
+  } else if (parent.type === "MemberExpression" && !methodNode.static) {
     // super.test -> ClassName.prototype.test
     return b.memberExpression(superName, b.identifier("prototype"), false);
   } else {