std: rewrite Hash to make it more generic

This patch merges IterBytes and Hash traits, which clears up the
confusion of using `#[deriving(IterBytes)]` to support hashing.
Instead, it now is much easier to use the new `#[deriving(Hash)]`
for making a type hashable with a stream hash.

Furthermore, it supports custom non-stream-based hashers, such as
if a value's hash was cached in a database.

This does not yet replace the old IterBytes-hash with this new
version.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/hashmap.rs b/src/libstd/hashmap.rs
index 5d4db106728..f3783c27b54 100644
--- a/src/libstd/hashmap.rs
+++ b/src/libstd/hashmap.rs
@@ -57,7 +57,7 @@ use clone::Clone;
 use cmp::{Eq, Equiv, max};
 use default::Default;
 use fmt;
-use hash::Hash;
+use hash_old::Hash;
 use iter;
 use iter::{Iterator, FromIterator, Extendable};
 use iter::{FilterMap, Chain, Repeat, Zip};