From dfcca546fcbdab16b2696550820b0cea5ea7a894 Mon Sep 17 00:00:00 2001
From: f001 <changchun.fan@qq.com>
Date: Wed, 1 Feb 2017 11:54:36 +0800
Subject: [PATCH] std: Add ToString trait specialization for Cow<'a, str> and
String
r? @bluss
---
src/libcollections/string.rs | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index b184a8603e6bd..9a985061ebbde 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -1866,6 +1866,22 @@ impl ToString for str {
}
}
+#[stable(feature = "cow_str_to_string_specialization", since = "1.17.0")]
+impl<'a> ToString for Cow<'a, str> {
+ #[inline]
+ fn to_string(&self) -> String {
+ self[..].to_owned()
+ }
+}
+
+#[stable(feature = "string_to_string_specialization", since = "1.17.0")]
+impl ToString for String {
+ #[inline]
+ fn to_string(&self) -> String {
+ self.to_owned()
+ }
+}
+
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRef<str> for String {
#[inline]