From ef519c1de54e6d833d05bac7c4ce290ae54e82dc Mon Sep 17 00:00:00 2001
From: Georg Semmler <georg_semmler_05@web.de>
Date: Thu, 9 Aug 2018 11:02:08 +0200
Subject: [PATCH] Add a implementation of `From` for converting `&'a Option<T>`
 into `Option<&'a T>`

---
 src/libcore/option.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index 2b6c376f8a7..ad69d137685 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -1064,6 +1064,12 @@ impl<T> From<T> for Option<T> {
     }
 }
 
+impl<'a, T> From<&'a Option<T>> for Option<&'a T> {
+    fn from(o: &'a Option<T>) -> Option<&'a T> {
+        o.as_ref()
+    }
+}
+
 /////////////////////////////////////////////////////////////////////////////
 // The Option Iterators
 /////////////////////////////////////////////////////////////////////////////