From bf9254a75e06f61ecd837e2f90ed0afc22ffdede Mon Sep 17 00:00:00 2001
From: Andrea Canciani <ranma42@gmail.com>
Date: Wed, 16 Sep 2015 15:25:51 +0200
Subject: [PATCH] Reuse cmp in totally ordered types

Instead of manually defining it, `partial_cmp` can simply wrap the
result of `cmp` for totally ordered types.
---
 src/libcore/cmp.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index dc550fc2173a..3344d7ea5d7f 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -471,9 +471,7 @@ mod impls {
             impl PartialOrd for $t {
                 #[inline]
                 fn partial_cmp(&self, other: &$t) -> Option<Ordering> {
-                    if *self == *other { Some(Equal) }
-                    else if *self < *other { Some(Less) }
-                    else { Some(Greater) }
+                    Some(self.cmp(other))
                 }
                 #[inline]
                 fn lt(&self, other: &$t) -> bool { (*self) < (*other) }