From 4aaaeb9ccf52e9471e1899349f6e8c72a6859de7 Mon Sep 17 00:00:00 2001
From: Amjad Masad <amjad.masad@gmail.com>
Date: Thu, 17 Dec 2015 23:31:52 -0800
Subject: [PATCH] decouple arrow functions from function exprs

---
 packages/babel-generator/src/node/parentheses.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/babel-generator/src/node/parentheses.js b/packages/babel-generator/src/node/parentheses.js
index 57d57d3fb8..14bc66028c 100644
--- a/packages/babel-generator/src/node/parentheses.js
+++ b/packages/babel-generator/src/node/parentheses.js
@@ -182,7 +182,12 @@ export function FunctionExpression(node: Object, parent: Object): boolean {
     return true;
   }
 
-  return ArrowFunctionExpression(node, parent);
+  // export default (function () {});
+  if (t.isExportDeclaration(parent)) {
+    return true;
+  }
+
+  return UnaryLike(node, parent);
 }
 
 export function ArrowFunctionExpression(node: Object, parent: Object): boolean {