From 6a09df9079279297c5f68c0a1214a17e8193cd6a Mon Sep 17 00:00:00 2001
From: Jack O'Connor <oconnor663@gmail.com>
Date: Sun, 17 Jul 2016 11:31:44 -0400
Subject: [PATCH] implement AddAssign for String

---
 src/libcollections/string.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index eedf4c2c11f..688f0576042 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -59,7 +59,7 @@
 use core::hash;
 use core::iter::FromIterator;
 use core::mem;
-use core::ops::{self, Add, Index, IndexMut};
+use core::ops::{self, Add, AddAssign, Index, IndexMut};
 use core::ptr;
 use core::str::pattern::Pattern;
 use rustc_unicode::char::{decode_utf16, REPLACEMENT_CHARACTER};
@@ -1559,6 +1559,14 @@ fn add(mut self, other: &str) -> String {
     }
 }
 
+#[stable(feature = "rust1", since = "1.11.0")]
+impl<'a> AddAssign<&'a str> for String {
+    #[inline]
+    fn add_assign(&mut self, other: &str) {
+        self.push_str(other);
+    }
+}
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl ops::Index<ops::Range<usize>> for String {
     type Output = str;
-- 
2.44.0