Trait MapInsert 

pub trait MapInsert<K>: Collection {
    type Output;

    // Required method
    fn insert(&mut self, key: K, value: Self::Item) -> Self::Output;
}

Mutable map where new new key-value pairs can be inserted.

Required Associated Types

type Output

The output of the insertion function.

Required Methods

fn insert(&mut self, key: K, value: Self::Item) -> Self::Output

Insert a new key-value pair in the collection.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<K: Hash + Eq, V> MapInsert<K> for HashMap<K, V>

type Output = Option<V>

fn insert(&mut self, key: K, value: V) -> Option<V>

impl<K: Ord, V> MapInsert<K> for BTreeMap<K, V>

type Output = Option<V>

fn insert(&mut self, key: K, value: V) -> Option<V>

Implementors