From f66cbbda70e9b007bbdd181a1167079126f50f58 Mon Sep 17 00:00:00 2001
From: Steven Fackler <sfackler@gmail.com>
Date: Sat, 9 Mar 2019 22:02:54 -0800
Subject: [PATCH] Implement last in terms of fold

---
 src/lib.rs | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 4d8ed38..708ad77 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -147,15 +147,11 @@ pub trait FallibleIterator {
 
     /// Returns the last element of the iterator.
     #[inline]
-    fn last(mut self) -> Result<Option<Self::Item>, Self::Error>
+    fn last(self) -> Result<Option<Self::Item>, Self::Error>
     where
         Self: Sized,
     {
-        let mut last = None;
-        while let Some(e) = self.next()? {
-            last = Some(e);
-        }
-        Ok(last)
+        self.fold(None, |_, v| Ok(Some(v)))
     }
 
     /// Returns the `n`th element of the iterator.