replace manual Hash impls with #[deriving(Hash)]

src/libstd/ascii.rs

@@ -18,13 +18,12 @@ use str::OwnedStr;
 use container::Container;
 use cast;
 use fmt;
-use hash::{Hash, sip};
 use iter::Iterator;
 use vec::{ImmutableVector, MutableVector, Vector};
 use option::{Option, Some, None};
 
 /// Datatype to hold one ascii character. It wraps a `u8`, with the highest bit always zero.
-#[deriving(Clone, Eq, Ord, TotalOrd, TotalEq)]
+#[deriving(Clone, Eq, Ord, TotalOrd, TotalEq, Hash)]
 pub struct Ascii { priv chr: u8 }
 
 impl Ascii {
@@ -306,13 +305,6 @@ impl IntoStr for ~[Ascii] {
     }
 }
 
-impl Hash for Ascii {
-    #[inline]
-    fn hash(&self, s: &mut sip::SipState) {
-        self.to_byte().hash(s)
-    }
-}
-
 /// Trait to convert to an owned byte array by consuming self
 pub trait IntoBytes {
     /// Converts to an owned byte array by consuming self

src/libsyntax/abi.rs

@@ -8,14 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::hash::{Hash, sip};
 use std::fmt;
 use std::fmt::Show;
 
 #[deriving(Eq)]
 pub enum Os { OsWin32, OsMacos, OsLinux, OsAndroid, OsFreebsd, }
 
-#[deriving(Eq)]
+#[deriving(Eq, Hash)]
 pub enum Abi {
     // NB: This ordering MUST match the AbiDatas array below.
     // (This is ensured by the test indices_are_correct().)
@@ -267,12 +266,6 @@ impl AbiSet {
     }
 }
 
-impl Hash for Abi {
-    fn hash(&self, s: &mut sip::SipState) {
-        self.index().hash(s)
-    }
-}
-
 impl fmt::Show for Abi {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         self.data().name.fmt(f)