From 4996e6bc7f222ab01cd8618d8b90dec6519c5a5d Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Tue, 15 Sep 2015 06:19:35 +0100
Subject: [PATCH] add parser util addExtra method

---
 packages/babylon/src/parser/util.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/babylon/src/parser/util.js b/packages/babylon/src/parser/util.js
index 2b1dd9e1b2..2719607626 100644
--- a/packages/babylon/src/parser/util.js
+++ b/packages/babylon/src/parser/util.js
@@ -8,6 +8,15 @@ const pp = Parser.prototype;
 
 // TODO
 
+pp.addExtra = function (node, key, val) {
+  if (!node) return;
+
+  var extra = node.extra = node.extra || {};
+  extra[key] = val;
+};
+
+// TODO
+
 pp.isRelational = function (op) {
   return this.match(tt.relational) && this.state.value === op;
 };