type annotate babylon

src/util/identifier.js

@@ -1,3 +1,5 @@
+/* @flow */
+
 // This is a trick taken from Esprima. It turns out that, on
 // non-Chrome browsers, to check whether a string is in a set, a
 // predicate containing a big ugly `switch` statement is faster than

src/util/location.js

@@ -1,3 +1,5 @@
+/* @flow */
+
 import { lineBreakG } from "./whitespace";
 
 // These are used when `options.locations` is on, for the

src/util/whitespace.js

@@ -1,3 +1,5 @@
+/* @flow */
+
 // Matches a whole line break (where CRLF is considered a single
 // line break). Used to count lines.