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, 5 deletions

diff --git a/src/libsyntax/util/interner.rs b/src/libsyntax/util/interner.rs
index 9b73cf533a7..969b9f81785 100644
--- a/src/libsyntax/util/interner.rs
+++ b/src/libsyntax/util/interner.rs
@@ -95,11 +95,7 @@ pub struct RcStr {
     priv string: Rc<~str>,
 }
 
-impl TotalEq for RcStr {
-    fn equals(&self, other: &RcStr) -> bool {
-        self.as_slice().equals(&other.as_slice())
-    }
-}
+impl TotalEq for RcStr {}
 
 impl TotalOrd for RcStr {
     fn cmp(&self, other: &RcStr) -> Ordering {