Struct netstack3_base::socketmap::OccupiedEntry

pub struct OccupiedEntry<'a, A: Hash + Eq, V: Tagged<A>>(/* private fields */);

An entry for a key in a map that has a value.

This type maintains the invariant that, if an OccupiedEntry(map, a) exists, SocketMap::get(map, a) is Some(v), i.e. the HashMap that SocketMap wraps contains a [MapValue] whose value field is Some(v).

Implementations

impl<'a, K: Eq + Hash + IterShadows, V: Tagged<K>> OccupiedEntry<'a, K, V>

pub fn key(&self) -> &K

Gets a reference to the key for the entry.

pub fn get(&self) -> &V

Retrieves the value referenced by this entry.

pub fn map_mut<R>(&mut self, apply: impl FnOnce(&mut V) -> R) -> R

Runs the provided callback on the value referenced by this entry.

Returns the result of the callback.

pub fn into_map(self) -> &'a mut SocketMap<K, V>

Extracts the underlying SocketMap reference backing this entry.

pub fn remove(self) -> V

Removes the value from the map and returns it.

pub fn get_map(&self) -> &SocketMap<K, V>

Gets a reference to the backing map.

pub fn remove_from_map(self) -> (V, &'a mut SocketMap<K, V>)

Removes the value from the map and returns the value and map.

Trait Implementations

impl<'a, A: Debug + Eq + Hash, V: Tagged<A>> Debug for OccupiedEntry<'a, A, V>

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

Formats the value using the given formatter.