Trait KvMap

pub trait KvMap<K: Ord + Clone, V: Clone>:
    Extend<(K, V)>
    + FromIterator<(K, V)>
    + IntoIterator<Item = (K, V)> {
    // Required methods
    fn get(&self, key: &K) -> Option<&V>;
    fn contains_key(&self, key: &K) -> bool;
    fn len(&self) -> usize;
    fn insert(&mut self, key: K, value: V) -> Option<V>;
    fn remove(&mut self, key: &K) -> Option<V>;
    fn iter(&self) -> Box<dyn Iterator<Item = (&K, &V)> + '_>;

    // Provided method
    fn is_empty(&self) -> bool { ... }
}

A trait that defines the interface for a key-value map.

Required Methods

fn get(&self, key: &K) -> Option<&V>

fn contains_key(&self, key: &K) -> bool

fn len(&self) -> usize

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

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

fn iter(&self) -> Box<dyn Iterator<Item = (&K, &V)> + '_>

Provided Methods

fn is_empty(&self) -> bool

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<K: Ord + Clone, V: Clone> KvMap<K, V> for BTreeMap<K, V>

fn get(&self, key: &K) -> Option<&V>

fn contains_key(&self, key: &K) -> bool

fn len(&self) -> usize

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

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

fn iter(&self) -> Box<dyn Iterator<Item = (&K, &V)> + '_>

Implementors

impl<K: Ord + Clone, V: Clone> KvMap<K, V> for RecordingMap<K, V>