Trait TryIndexMut 

pub trait TryIndexMut<Idx: ?Sized>: TryIndex<Idx> {
    // Required method
    fn try_index_mut(&mut self, index: &Idx) -> Option<&mut Self::Output>;
}

A TryIndex whose elements can also be modified in place.

Required Methods

fn try_index_mut(&mut self, index: &Idx) -> Option<&mut Self::Output>

Mutably borrows the element stored under index, or None if there is none.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<K, V, S> TryIndexMut<K> for HashMap<K, V, S>

where K: Hash + Eq, S: BuildHasher,

fn try_index_mut(&mut self, index: &K) -> Option<&mut V>

impl<K, V> TryIndexMut<K> for BTreeMap<K, V>

where K: Ord,

fn try_index_mut(&mut self, index: &K) -> Option<&mut V>

Implementors