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, 2 insertions, 2 deletions

diff --git a/src/libstd/iter.rs b/src/libstd/iter.rs
index ead26fb920c..8762f23c3ce 100644
--- a/src/libstd/iter.rs
+++ b/src/libstd/iter.rs
@@ -2180,13 +2180,13 @@ pub mod order {
     use option::{Some, None};
     use super::Iterator;
 
-    /// Compare `a` and `b` for equality using `TotalOrd`
+    /// Compare `a` and `b` for equality using `TotalEq`
     pub fn equals<A: TotalEq, T: Iterator<A>>(mut a: T, mut b: T) -> bool {
         loop {
             match (a.next(), b.next()) {
                 (None, None) => return true,
                 (None, _) | (_, None) => return false,
-                (Some(x), Some(y)) => if !x.equals(&y) { return false },
+                (Some(x), Some(y)) => if x != y { return false },
             }
         }
     }