From c67a34b9e509b76ff145526f28a20f9495c2ab61 Mon Sep 17 00:00:00 2001
From: Garming Sam <garming_sam@outlook.com>
Date: Thu, 6 Aug 2015 18:43:02 +1200
Subject: [PATCH] Binary ops should add parenthesis to each side

Otherwise, we get (1 + 2) * 3 looking like 1 + 2 * 3
---
 src/libsyntax/print/pprust.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 3b8ee91374ca..147314739f8d 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -1670,10 +1670,10 @@ impl<'a> State<'a> {
                          op: ast::BinOp,
                          lhs: &ast::Expr,
                          rhs: &ast::Expr) -> io::Result<()> {
-        try!(self.print_expr(lhs));
+        try!(self.print_expr_maybe_paren(lhs));
         try!(space(&mut self.s));
         try!(self.word_space(ast_util::binop_to_string(op.node)));
-        self.print_expr(rhs)
+        self.print_expr_maybe_paren(rhs)
     }
 
     fn print_expr_unary(&mut self,