Struct HashColumn

pub struct HashColumn<K, V, S = RandomState>(/* private fields */);

An unindexed column backed by a hash map.

Trait Implementations

impl<K: Clone, V: Clone, S: Clone> Clone for HashColumn<K, V, S>

fn clone(&self) -> HashColumn<K, V, S>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K, V, S> Column for HashColumn<K, V, S>

where K: Eq + Hash + Clone, V: Eq + Clone, S: BuildHasher,

fn iter(&self) -> impl Iterator<Item = (K, &V)>

Iterates over pairs stored by the column.

fn values(&self) -> impl Iterator<Item = &Self::Cod>

Iterates over values stored by the column.

fn is_empty(&self) -> bool

Is the mapping not defined anywhere?

fn preimage(&self, y: &Self::Cod) -> impl Iterator<Item = Self::Dom>

Computes the preimage of the mapping at a value in the codomain.

impl<K: Debug, V: Debug, S: Debug> Debug for HashColumn<K, V, S>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<K, V, S> Default for HashColumn<K, V, S>

where S: Default,

fn default() -> Self

Returns the “default value” for a type.

impl<K, V, S> From<HashMap<K, V, S>> for HashColumn<K, V, S>

fn from(value: HashMap<K, V, S>) -> Self

Converts to this type from the input type.

impl<K, V, S> Mapping for HashColumn<K, V, S>

where K: Eq + Hash + Clone, V: Eq + Clone, S: BuildHasher,

type Dom = K

Type of elements in domain of mapping.

type Cod = V

Type of elements in codomain of mapping.

fn apply(&self, x: &K) -> Option<V>

Applies the mapping at a point possibly in the domain.

fn is_set(&self, x: &K) -> bool

Is the mapping defined at a point?

impl<K, V, S> MutMapping for HashColumn<K, V, S>

where K: Eq + Hash + Clone, V: Eq + Clone, S: BuildHasher,

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

Gets the value of the mapping at a point possibly in the domain.

fn set(&mut self, x: K, y: V) -> Option<V>

Sets the mapping at a point.

fn unset(&mut self, x: &K) -> Option<V>

Un-sets the mapping at a point, making it undefined at that point.

fn update( &mut self, x: Self::Dom, maybe_y: Option<Self::Cod>, ) -> Option<Self::Cod>

Updates the mapping at a point, setting or unsetting it.

impl<K, V, S> PartialEq for HashColumn<K, V, S>

where K: Eq + Hash, V: PartialEq, S: BuildHasher,

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K, V, S> Eq for HashColumn<K, V, S>

where K: Eq + Hash, V: Eq, S: BuildHasher,