Struct scc::hash_cache::VacantEntry

pub struct VacantEntry<'h, K, V, H = RandomState>
where
    H: BuildHasher,
{ /* private fields */ }

VacantEntry is a view into a vacant cache entry in a HashCache.

Implementations

impl<'h, K, V, H> VacantEntry<'h, K, V, H>

where K: Eq + Hash, H: BuildHasher,

pub fn key(&self) -> &K

Gets a reference to the key.

Examples

use scc::HashCache;

let hashcache: HashCache<u64, u32> = HashCache::default();
assert_eq!(hashcache.entry(11).key(), &11);

pub fn into_key(self) -> K

Takes ownership of the key.

Examples

use scc::HashCache;
use scc::hash_cache::Entry;

let hashcache: HashCache<u64, u32> = HashCache::default();

if let Entry::Vacant(v) = hashcache.entry(17) {
    assert_eq!(v.into_key(), 17);
};

pub fn put_entry( self, val: V, ) -> (EvictedEntry<K, V>, OccupiedEntry<'h, K, V, H>)

Sets the value of the entry with its key, and returns an OccupiedEntry.

Returns a key-value pair if an entry was evicted for the new key-value pair.

Examples

use scc::HashCache;
use scc::hash_cache::Entry;

let hashcache: HashCache<u64, u32> = HashCache::default();

if let Entry::Vacant(o) = hashcache.entry(19) {
    o.put_entry(29);
}

assert_eq!(*hashcache.get(&19).unwrap().get(), 29);

Trait Implementations

impl<'h, K, V, H> Debug for VacantEntry<'h, K, V, H>

where K: Debug + Eq + Hash, V: Debug, H: BuildHasher,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.