Trait total_maps::Commonality

pub trait Commonality<V> {
    // Required methods
    fn common() -> V;
    fn is_common(value: &V) -> bool;
}

Defines a notion of “common” vs. “uncommon” values for the type V, used to determine which entries are stored in a TotalHashMap or TotalBTreeMap.

There could be multiple definitions of commonality for the same type:

• The basic implementation, DefaultCommonality, is based on the Default trait.
• EmptyCommonality is specialized for collection types.
• ZeroCommonality is based on the num_traits::Zero trait.

Required Methods

fn common() -> V

The common value of type V.

fn is_common(value: &V) -> bool

Returns true if value is the common value of type V. Self::is_common(Self::common()) must be true.

Object Safety

This trait is not object safe.

Implementors

impl<K, V> Commonality<BTreeMap<K, V>> for EmptyCommonality

impl<K, V> Commonality<HashMap<K, V>> for EmptyCommonality

impl<K, V, C: Commonality<V>> Commonality<TotalBTreeMap<K, V, C>> for EmptyCommonality

impl<K, V, C: Commonality<V>> Commonality<TotalHashMap<K, V, C>> for EmptyCommonality

impl<T> Commonality<BTreeSet<T>> for EmptyCommonality

impl<T> Commonality<VecDeque<T>> for EmptyCommonality

impl<T> Commonality<Vec<T>> for EmptyCommonality

impl<T> Commonality<HashSet<T>> for EmptyCommonality

impl<T: PartialEq + Default> Commonality<T> for DefaultCommonality

impl<T: Zero> Commonality<T> for ZeroCommonality