Struct btlib::collections::hash_map_with_default::HashMapWithDefault

pub struct HashMapWithDefault<K, V> { /* private fields */ }

A newtype wrapping a HashMap which allows a default value to be defined. When a key is not found in the HashMap the default value is returned, instead of None.

Implementations

impl<K, V> HashMapWithDefault<K, V>

pub fn new(default: V) -> Self

Create a new hash map with the given default value.

pub fn get_ref(&self) -> &HashMap<K, V>

Get a reference to the inner HashMap.

pub fn get_mut(&mut self) -> &mut HashMap<K, V>

Get a mutable reference to the inner HashMap.

pub fn default(&self) -> &V

Returns a reference to the default value.

pub fn mut_default(&mut self) -> &mut V

Returns a mutable reference to the default value.

impl<K: Hash + Eq, V> HashMapWithDefault<K, V>

pub fn get<Q: ?Sized + Hash + Eq>(&self, index: &Q) -> &Vwhere K: Borrow<Q>,

Lookup up the item with the given key in the hash table. If no value is found then the default is returned.

Trait Implementations

impl<Q: ?Sized + Hash + Eq, K: Borrow<Q> + Hash + Eq, V> Index<&Q> for HashMapWithDefault<K, V>

type Output = V

The returned type after indexing.

fn index(&self, index: &Q) -> &Self::Output

Performs the indexing (container[index]) operation.