Enum RawEntryMut

pub enum RawEntryMut<'a, K, V, S> {
    Occupied(RawOccupiedEntryMut<'a, K, V, S>),
    Vacant(RawVacantEntryMut<'a, K, V, S>),
}

Raw entry for an existing key-value pair or a vacant location to insert one.

Variants

Occupied(RawOccupiedEntryMut<'a, K, V, S>)

Existing slot with equivalent key.

Vacant(RawVacantEntryMut<'a, K, V, S>)

Vacant slot (no equivalent key in the map).

Implementations

impl<'a, K, V, S> RawEntryMut<'a, K, V, S>

pub fn index(&self) -> usize

Return the index where the key-value pair exists or may be inserted.

pub fn or_insert( self, default_key: K, default_value: V, ) -> (&'a mut K, &'a mut V)

where K: Hash, S: BuildHasher,

Inserts the given default key and value in the entry if it is vacant and returns mutable references to them. Otherwise mutable references to an already existent pair are returned.

pub fn or_insert_with<F>(self, call: F) -> (&'a mut K, &'a mut V)

where F: FnOnce() -> (K, V), K: Hash, S: BuildHasher,

Inserts the result of the call function in the entry if it is vacant and returns mutable references to them. Otherwise mutable references to an already existent pair are returned.

pub fn and_modify<F>(self, f: F) -> Self

where F: FnOnce(&mut K, &mut V),

Modifies the entry if it is occupied.

Trait Implementations

impl<K: Debug, V: Debug, S> Debug for RawEntryMut<'_, K, V, S>

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

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• Occupied: 32 bytes
• Vacant: 32 bytes