auto merge of #13102 : huonw/rust/totaleq-deriving, r=thestinger

std: remove the `equals` method from `TotalEq`.

`TotalEq` is now just an assertion about the `Eq` impl of a
type (i.e. `==` is a total equality if a type implements `TotalEq`) so
the extra method is just confusing.

Also, a new method magically appeared as a hack to allow deriving to
assert that the contents of a struct/enum are also TotalEq, because the
deriving infrastructure makes it very hard to do anything but create a
trait method. (You didn't hear about this horrible work-around from me
:(.)

1 files changed, 1 insertions, 4 deletions

diff --git a/src/libstd/unit.rs b/src/libstd/unit.rs
index b23dafbca69..38307f415ac 100644
--- a/src/libstd/unit.rs
+++ b/src/libstd/unit.rs
@@ -37,10 +37,7 @@ impl TotalOrd for () {
 }
 
 #[cfg(not(test))]
-impl TotalEq for () {
-    #[inline]
-    fn equals(&self, _other: &()) -> bool { true }
-}
+impl TotalEq for () {}
 
 #[cfg(not(test))]
 impl Default for () {