Trait MapMut 

pub trait MapMut<K: ?Sized>: MapGet<K>
where
    Self::Key: Borrow<K>,
{
    // Required methods
    fn get_mut(&mut self, key: &K) -> Option<&mut Self::Value>;
    fn remove(&mut self, key: &K) -> Option<Self::Value>;
}

Mutator for a map.

Required Methods

fn get_mut(&mut self, key: &K) -> Option<&mut Self::Value>

Returns a mutable reference to the value corresponding to the key if exists.

fn remove(&mut self, key: &K) -> Option<Self::Value>

Removes and returns the element at key from the map if exists.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<B: ?Sized + Eq + Hash, K: Borrow<B> + Eq + Hash, V, S: BuildHasher> MapMut<B> for HashMap<K, V, S>

fn get_mut(&mut self, key: &B) -> Option<&mut Self::Value>

fn remove(&mut self, key: &B) -> Option<Self::Value>

impl<B: ?Sized + Ord, K: Borrow<B> + Ord, V> MapMut<B> for BTreeMap<K, V>

fn get_mut(&mut self, key: &B) -> Option<&mut Self::Value>

fn remove(&mut self, key: &B) -> Option<Self::Value>

impl<T> MapMut<usize> for Vec<T>

fn remove(&mut self, key: &usize) -> Option<Self::Value>

Removes and returns the element at given index, shifting all elements after it to the left.

fn get_mut(&mut self, key: &usize) -> Option<&mut Self::Value>

Implementors

impl<T, I: GenIndex, M> MapMut<I> for GenIndexMap<T, I, M>

where I::Index: TryInto<M::Key>, M: MapMut<<M as Map>::Key, Value = (I, T)>,

impl<T, I: GenIndex, const N: usize> MapMut<I> for PagedSlotMap<T, I, N>

where I::Index: TryFrom<usize> + TryInto<usize>,

impl<T, I: GenIndex> MapMut<I> for SparseSet<T, I>

where I::Index: TryInto<usize>,

impl<T> MapMut<usize> for VecMap<T>