1 use std::collections::{HashMap, HashSet};
2 use std::hash::{BuildHasherDefault, Hasher};
4 pub type UnhashMap<K, V> = HashMap<K, V, BuildHasherDefault<Unhasher>>;
5 pub type UnhashSet<V> = HashSet<V, BuildHasherDefault<Unhasher>>;
7 /// This no-op hasher expects only a single `write_u64` call. It's intended for
8 /// map keys that already have hash-like quality, like `Fingerprint`.
14 impl Hasher for Unhasher {
16 fn finish(&self) -> u64 {
20 fn write(&mut self, _bytes: &[u8]) {
21 unimplemented!("use write_u64");
25 fn write_u64(&mut self, value: u64) {
26 debug_assert_eq!(0, self.value, "Unhasher doesn't mix values!");