Trait Keyed 

pub trait Keyed {
    type Key;
    type Value;

    // Required methods
    fn different_keys<'l>(
        &'l self,
        other: &'l Self,
    ) -> SmallVec<[&'l Self::Key; 2]>;
    fn get(&self, key: &Self::Key) -> Option<&Self::Value>;

    // Provided method
    fn contains_key(&self, key: &Self::Key) -> bool { ... }
}

Required Associated Types

type Key

type Value

Required Methods

fn different_keys<'l>(&'l self, other: &'l Self) -> SmallVec<[&'l Self::Key; 2]>

fn get(&self, key: &Self::Key) -> Option<&Self::Value>

Provided Methods

fn contains_key(&self, key: &Self::Key) -> 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: Eq + Hash, H: BuildHasher> Keyed for HashSet<K, H>

type Key = K

type Value = ()

fn different_keys<'l>(&'l self, other: &'l Self) -> SmallVec<[&'l Self::Key; 2]>

fn get(&self, key: &Self::Key) -> Option<&Self::Value>

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

impl<K: Eq + Hash, H: BuildHasher> Keyed for IndexSet<K, H>

type Key = K

type Value = ()

fn different_keys<'l>(&'l self, other: &'l Self) -> SmallVec<[&'l Self::Key; 2]>

fn get(&self, key: &Self::Key) -> Option<&Self::Value>

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

impl<K: Eq + Hash, V: PartialEq, H: BuildHasher> Keyed for HashMap<K, V, H>

type Key = K

type Value = V

fn different_keys<'l>(&'l self, other: &'l Self) -> SmallVec<[&'l Self::Key; 2]>

fn get(&self, key: &Self::Key) -> Option<&Self::Value>

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

impl<K: Eq + Hash, V: PartialEq, H: BuildHasher> Keyed for IndexMap<K, V, H>

type Key = K

type Value = V

fn different_keys<'l>(&'l self, other: &'l Self) -> SmallVec<[&'l Self::Key; 2]>

fn get(&self, key: &Self::Key) -> Option<&Self::Value>

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

Implementors