cmp: switch `min` and `max` to `TotalOrd`

The `Float` trait provides correct `min` and `max` methods on floating
point types, providing a consistent result regardless of the order the
parameters are passed.

These generic functions do not take the necessary performance hit to
correctly support a partial order, so the true requirement should be
given as a type bound.

Closes #12712

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/cmp.rs b/src/libstd/cmp.rs
index 6975c9da3f0..023b2028703 100644
--- a/src/libstd/cmp.rs
+++ b/src/libstd/cmp.rs
@@ -184,12 +184,12 @@ pub trait Equiv<T> {
 }
 
 #[inline]
-pub fn min<T:Ord>(v1: T, v2: T) -> T {
+pub fn min<T: TotalOrd>(v1: T, v2: T) -> T {
     if v1 < v2 { v1 } else { v2 }
 }
 
 #[inline]
-pub fn max<T:Ord>(v1: T, v2: T) -> T {
+pub fn max<T: TotalOrd>(v1: T, v2: T) -> T {
     if v1 > v2 { v1 } else { v2 }
 }