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#![allow(non_snake_case)]
use std::collections::hash_state::DefaultState;
use std::collections::{HashMap, HashSet};
use std::default::Default;
use std::hash::{Hasher, Hash};
use syntax::ast;
pub type FnvHashMap<K, V> = HashMap<K, V, DefaultState<FnvHasher>>;
pub type FnvHashSet<V> = HashSet<V, DefaultState<FnvHasher>>;
pub type NodeMap<T> = FnvHashMap<ast::NodeId, T>;
pub type DefIdMap<T> = FnvHashMap<ast::DefId, T>;
pub type NodeSet = FnvHashSet<ast::NodeId>;
pub type DefIdSet = FnvHashSet<ast::DefId>;
pub fn FnvHashMap<K: Hash + Eq, V>() -> FnvHashMap<K, V> {
Default::default()
}
pub fn FnvHashSet<V: Hash + Eq>() -> FnvHashSet<V> {
Default::default()
}
pub fn NodeMap<T>() -> NodeMap<T> { FnvHashMap() }
pub fn DefIdMap<T>() -> DefIdMap<T> { FnvHashMap() }
pub fn NodeSet() -> NodeSet { FnvHashSet() }
pub fn DefIdSet() -> DefIdSet { FnvHashSet() }
pub struct FnvHasher(u64);
impl Default for FnvHasher {
fn default() -> FnvHasher { FnvHasher(0xcbf29ce484222325) }
}
impl Hasher for FnvHasher {
fn write(&mut self, bytes: &[u8]) {
let FnvHasher(mut hash) = *self;
for byte in bytes {
hash = hash ^ (*byte as u64);
hash = hash.wrapping_mul(0x100000001b3);
}
*self = FnvHasher(hash);
}
fn finish(&self) -> u64 { self.0 }
}