more estree updates - finish flow parsing

src/babel/helpers/parse.js

@@ -13,6 +13,7 @@ export default function (opts, code, callback) {
       allowReturnOutsideFunction:  opts.looseModules,
       ecmaVersion:                 6,
       strictMode:                  opts.strictMode,
+      sourceType:                  opts.sourceType,
       onComment:                   comments,
       locations:                   true,
       features:                    opts.features || {},
@@ -21,8 +22,8 @@ export default function (opts, code, callback) {
       ranges:                      true
     };
 
-    parseOpts.plugins.flow = true;
     parseOpts.plugins.jsx = true;
+    parseOpts.plugins.flow = true;
 
     var ast = acorn.parse(code, parseOpts);
 

src/babel/transformation/templates/.babelrc

@@ -1,5 +1,4 @@
 {
   "blacklist": ["useStrict", "es6.blockScoping", "regenerator"],
-  "loose": ["es6.modules"],
-  "breakConfig": true
+  "loose": ["es6.modules"]
 }

src/babel/transformation/transformers/es6/classes.js

@@ -180,7 +180,7 @@ class ClassTransformer {
     for (var i = 0; i < classBody.length; i++) {
       var node = classBody[i];
       if (t.isMethodDefinition(node)) {
-        var isConstructor = (!node.computed && t.isIdentifier(node.key, { name: "constructor" })) || t.isLiteral(node.key, { value: "constructor" });
+        var isConstructor = node.kind === "constructor";
         if (isConstructor) this.verifyConstructor(classBodyPaths[i]);
 
         var replaceSupers = new ReplaceSupers({
@@ -332,10 +332,6 @@ class ClassTransformer {
    */
 
   pushConstructor(method: { type: "MethodDefinition" }) {
-    if (method.kind) {
-      throw this.file.errorWithNode(method, messages.get("classesIllegalConstructorKind"));
-    }
-
     var construct = this.constructor;
     var fn        = method.value;
 

src/babel/traversal/index.js

@@ -37,23 +37,15 @@ traverse.node = function (node, opts, scope, state, parentPath) {
   }
 };
 
+const CLEAR_KEYS = [
+  "trailingComments", "leadingComments", "_declarations", "extendedRange",
+  "_paths", "tokens", "range", "start", "end", "loc", "raw"
+];
+
 function clearNode(node) {
-  node._declarations = null;
-  node.extendedRange = null;
-  node._paths        = null;
-  node.tokens        = null;
-  node.range         = null;
-  node.start         = null;
-  node.end           = null;
-  node.loc           = null;
-  node.raw           = null;
-
-  if (Array.isArray(node.trailingComments)) {
-    clearComments(node.trailingComments);
-  }
-
-  if (Array.isArray(node.leadingComments)) {
-    clearComments(node.leadingComments);
+  for (var i = 0; i < CLEAR_KEYS.length; i++) {
+    var key = CLEAR_KEYS[i];
+    if (node[key] != null) node[key] = null;
   }
 
   for (var key in node) {