From 6d0a64dcc97a1857f7e12be00189870860a68a3e Mon Sep 17 00:00:00 2001
From: Chris Morgan <me@chrismorgan.info>
Date: Sat, 5 Mar 2016 12:58:19 +1100
Subject: [PATCH] Ungate efficient hashing (stable in Rust 1.7.0).

---
 src/lib.rs |  1 -
 src/raw.rs | 42 +++++-------------------------------------
 2 files changed, 5 insertions(+), 38 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 64a0f6b..6eac7dc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,5 @@
 //! This crate provides the `AnyMap` type, a safe and convenient store for one value of each type.
 
-#![cfg_attr(feature = "unstable", feature(hashmap_hasher, raw))]
 #![cfg_attr(all(feature = "unstable", test), feature(test))]
 #![warn(missing_docs, unused_results)]
 
diff --git a/src/raw.rs b/src/raw.rs
index 3d1be50..445b137 100644
--- a/src/raw.rs
+++ b/src/raw.rs
@@ -5,38 +5,19 @@
 use std::any::TypeId;
 use std::borrow::Borrow;
 use std::collections::hash_map::{self, HashMap};
-#[cfg(feature = "unstable")]
-use std::collections::hash_state::HashState;
 use std::hash::Hash;
-#[cfg(feature = "unstable")]
-use std::hash::Hasher;
-#[cfg(feature = "unstable")]
+use std::hash::{Hasher, BuildHasherDefault};
 use std::mem;
 use std::ops::{Index, IndexMut};
-#[cfg(feature = "unstable")]
 use std::ptr;
 
 use any::{Any, UncheckedAnyExt};
 
-#[cfg(feature = "unstable")]
+#[derive(Default)]
 struct TypeIdHasher {
     value: u64,
 }
 
-#[derive(Clone)]
-#[cfg(feature = "unstable")]
-struct TypeIdState;
-
-#[cfg(feature = "unstable")]
-impl HashState for TypeIdState {
-    type Hasher = TypeIdHasher;
-
-    fn hasher(&self) -> TypeIdHasher {
-        TypeIdHasher { value: 0 }
-    }
-}
-
-#[cfg(feature = "unstable")]
 impl Hasher for TypeIdHasher {
     #[inline(always)]
     fn write(&mut self, bytes: &[u8]) {
@@ -51,7 +32,6 @@ impl Hasher for TypeIdHasher {
     fn finish(&self) -> u64 { self.value }
 }
 
-
 /// The raw, underlying form of a `Map`.
 ///
 /// At its essence, this is a wrapper around `HashMap<TypeId, Box<Any>>`, with the portions that
@@ -61,11 +41,7 @@ impl Hasher for TypeIdHasher {
 /// doesn’t tend to be so very useful. Still, if you need it, it’s here.
 #[derive(Debug)]
 pub struct RawMap<A: ?Sized + UncheckedAnyExt = Any> {
-    #[cfg(feature = "unstable")]
-    inner: HashMap<TypeId, Box<A>, TypeIdState>,
-
-    #[cfg(not(feature = "unstable"))]
-    inner: HashMap<TypeId, Box<A>>,
+    inner: HashMap<TypeId, Box<A>, BuildHasherDefault<TypeIdHasher>>,
 }
 
 // #[derive(Clone)] would want A to implement Clone, but in reality it’s only Box<A> that can.
@@ -83,18 +59,10 @@ impl<A: ?Sized + UncheckedAnyExt> Default for RawMap<A> {
     }
 }
 
-#[cfg(feature = "unstable")]
-impl_common_methods! {
-    field: RawMap.inner;
-    new() => HashMap::with_hash_state(TypeIdState);
-    with_capacity(capacity) => HashMap::with_capacity_and_hash_state(capacity, TypeIdState);
-}
-
-#[cfg(not(feature = "unstable"))]
 impl_common_methods! {
     field: RawMap.inner;
-    new() => HashMap::new();
-    with_capacity(capacity) => HashMap::with_capacity(capacity);
+    new() => HashMap::with_hasher(Default::default());
+    with_capacity(capacity) => HashMap::with_capacity_and_hasher(capacity, Default::default());
 }
 
 /// RawMap iterator.
-- 
2.42.0