pub struct RandomState<T: FastHash> { /* private fields */ }
Expand description
RandomState
provides the default state for HashMap
or HashSet
types.
A particular instance RandomState
will create the same instances of
Hasher
, but the hashers created by two different RandomState
instances are unlikely to produce the same result for the same values.
use std::collections::HashMap;
use fasthash::RandomState;
use fasthash::city::Hash64;
let s = RandomState::<Hash64>::new();
let mut map = HashMap::with_hasher(s);
assert_eq!(map.insert(37, "a"), None);
assert_eq!(map.is_empty(), false);
map.insert(37, "b");
assert_eq!(map.insert(37, "c"), Some("b"));
assert_eq!(map[&37], "c");
Implementations§
Trait Implementations§
Source§impl<T: FastHash> BuildHasher for RandomState<T>
impl<T: FastHash> BuildHasher for RandomState<T>
Source§fn build_hasher(&self) -> Self::Hasher
fn build_hasher(&self) -> Self::Hasher
Creates a new hasher. Read more
Source§impl<T: Clone + FastHash> Clone for RandomState<T>
impl<T: Clone + FastHash> Clone for RandomState<T>
Source§fn clone(&self) -> RandomState<T>
fn clone(&self) -> RandomState<T>
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreAuto Trait Implementations§
impl<T> Freeze for RandomState<T>
impl<T> RefUnwindSafe for RandomState<T>where
T: RefUnwindSafe,
impl<T> Send for RandomState<T>where
T: Send,
impl<T> Sync for RandomState<T>where
T: Sync,
impl<T> Unpin for RandomState<T>where
T: Unpin,
impl<T> UnwindSafe for RandomState<T>where
T: UnwindSafe,
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more