From 5199a7060bc0004d42a72ae6079493935777cf31 Mon Sep 17 00:00:00 2001
From: Tobias Bucher <tobiasbucher5991@gmail.com>
Date: Tue, 10 Mar 2015 14:18:24 +0100
Subject: [PATCH] Remove unneeded `saturating_add`

---
 src/libcore/str/mod.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index b354116993c23..bb03994fc7a82 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -432,7 +432,10 @@ impl<'a> Iterator for Chars<'a> {
     #[inline]
     fn size_hint(&self) -> (usize, Option<usize>) {
         let (len, _) = self.iter.size_hint();
-        (len.saturating_add(3) / 4, Some(len))
+        // `(len + 3)` can't overflow, because we know that the `slice::Iter`
+        // belongs to a slice in memory which has a maximum length of
+        // `isize::MAX` (that's well below `usize::MAX`).
+        ((len + 3) / 4, Some(len))
     }
 }