From 5a47c7a15c0f7e4377e30660672c8ceca6655c75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1@outlook.kr>
Date: Wed, 18 Sep 2019 16:05:36 +0900
Subject: [PATCH] Fix `1 - (1 - 1)` (#418)

---
 ecmascript/transforms/src/fixer.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ecmascript/transforms/src/fixer.rs b/ecmascript/transforms/src/fixer.rs
index 3bf3ff4b1a9..a09bc2c6936 100644
--- a/ecmascript/transforms/src/fixer.rs
+++ b/ecmascript/transforms/src/fixer.rs
@@ -353,7 +353,7 @@ impl Fold<Expr> for Fixer {
                     | e @ Expr::Cond(..)
                     | e @ Expr::Arrow(..) => box e.wrap_with_paren(),
                     Expr::Bin(BinExpr { op: op_of_rhs, .. }) => {
-                        if op_of_rhs.precedence() < expr.op.precedence() {
+                        if op_of_rhs.precedence() <= expr.op.precedence() {
                             box expr.right.wrap_with_paren()
                         } else {
                             expr.right
@@ -826,4 +826,6 @@ var store = global[SHARED] || (global[SHARED] = {});
         "const myFilter = (arr, filter) => arr.filter(filter || ((x) => x));"
     );
 
+    identical!(issue_418, "const a = 1 - (1 - 1)");
+
 }