From 426cebc0e1aa4045aa25d30b944496d78d9f5059 Mon Sep 17 00:00:00 2001
From: jchbh <changhai.jiang@gmail.com>
Date: Fri, 29 May 2015 01:49:42 -0700
Subject: [PATCH] fix bug when ||, && then yield, should has () wrap the code.

---
 lib/output.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/output.js b/lib/output.js
index cb743bd6..e539bc1b 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -1068,7 +1068,10 @@ function OutputStream(options) {
             // the space is optional depending on "beautify"
             output.space();
         }
+        var isYield = (self.right.operator == "yield" || self.right.operator === "yield*");
+        isYield && output.print("(");
         self.right.print(output);
+        isYield && output.print(")");
     });
     DEFPRINT(AST_Conditional, function(self, output){
         self.condition.print(output);