From 382c0d9c1afc734131893b4faf48ed7c2048a1f9 Mon Sep 17 00:00:00 2001
From: Amjad Masad <amjad.masad@gmail.com>
Date: Tue, 27 Oct 2015 18:09:48 -0700
Subject: [PATCH] Parens are needed unless it's a logical expression

---
 packages/babel/src/generation/node/parentheses.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/babel/src/generation/node/parentheses.js b/packages/babel/src/generation/node/parentheses.js
index d4ac95cf55..3d3927a1c7 100644
--- a/packages/babel/src/generation/node/parentheses.js
+++ b/packages/babel/src/generation/node/parentheses.js
@@ -97,6 +97,11 @@ export function Binary(node, parent) {
     if (parentPos > nodePos) {
       return true;
     }
+
+    // Logical expressions with the same precedence don't need parens.
+    if (parentPos === nodePos && parent.right === node && !t.isLogicalExpression(parent)) {
+      return true;
+    }
   }
 }