Struct InlineSparseScalarLookupMap 

pub struct InlineSparseScalarLookupMap<K, V, const SZ: usize, const LTSZ: usize, CM = SmallCollection> { /* private fields */ }

A map whose keys are a sparse range of integers.

This type is an implementation detail of the `frozen_collections` crate. This API is therefore not stable and may change at any time. Please do not use this type directly, and instead use the public API provided by the `frozen_collections` crate.

A frozen collection differs from the traditional Rust collections, such as [`HashMap`](std::collections::HashMap) and [`HashSet`](std::collections::HashSet) types in three key ways. First, creating a frozen collection performs an analysis over the input data to determine the best implementation strategy. Depending on the situation, this analysis is performed at build time or runtime, and it can take a relatively long time when a collection is very large. Second, once created, the keys in frozen collections are immutable. And third, querying a frozen collection is typically considerably faster, which is the whole point.

Type Parameters

• K: The key type.
• V: The value type.
• CM: The magnitude of the map, one of SmallCollection, MediumCollection, or LargeCollection.
• SZ: The number of entries in the map.
• LTSZ: The number of entries in the lookup table.

Implementations

impl<K, V, const SZ: usize, const LTSZ: usize, CM> InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

pub const fn new_raw( sorted_and_dedupped_entries: [(K, V); SZ], lookup: [CM; LTSZ], min: usize, max: usize, ) -> Self

Creates a frozen map.

Panics

Panics if LTSZ is zero, if min > max, if max - min + 1 does not equal LTSZ, or if any non-zero lookup value exceeds SZ.

Expectations

Callers must ensure:

• Entries are sorted and deduplicated.

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

where Q: Comparable<K> + Scalar,

Returns a reference to the value corresponding to the key.

The key may be any borrowed form of the map’s key type.

pub fn get_mut<Q>(&mut self, key: &Q) -> Option<&mut V>

where Q: Comparable<K> + Scalar,

Returns a mutable reference to the value corresponding to the key.

The key may be any borrowed form of the map’s key type.

pub fn get_key_value<Q>(&self, key: &Q) -> Option<(&K, &V)>

where Q: Comparable<K> + Scalar,

Returns the key-value pair corresponding to the supplied key.

This is potentially useful:

• for key types where non-identical keys can be considered equal;

• for getting the &K stored key value from a borrowed &Q lookup key; or

• for getting a reference to a key with the same lifetime as the collection.

• The supplied key may be any borrowed form of the map’s key type, but Hash and Eq on the borrowed form must match those for the key type.

pub fn contains_key<Q>(&self, key: &Q) -> bool

where Q: Comparable<K> + Scalar,

Returns true if the map contains a value for the specified key.

The key may be any borrowed form of the map’s key type.

pub fn get_disjoint_mut<Q, const N: usize>( &mut self, keys: [&Q; N], ) -> [Option<&mut V>; N]

where Q: Eq + Comparable<K> + Scalar,

Gets multiple mutable values from the map.

Panics

Panics if the same key is specified multiple times.

pub unsafe fn get_disjoint_unchecked_mut<Q, const N: usize>( &mut self, keys: [&Q; N], ) -> [Option<&mut V>; N]

where Q: Comparable<K> + Scalar,

Gets multiple mutable values from the map.

Safety

Calling this method with overlapping keys is undefined behavior even if the resulting references are not used.

pub fn iter(&self) -> Iter<'_, K, V>

An iterator visiting all entries in arbitrary order.

pub fn iter_mut(&mut self) -> IterMut<'_, K, V>

An iterator producing mutable references to all entries in arbitrary order.

pub fn keys(&self) -> Keys<'_, K, V>

An iterator visiting all keys in arbitrary order.

pub fn into_keys(self) -> IntoKeys<K, V>

A consuming iterator visiting all keys in arbitrary order.

pub fn values(&self) -> Values<'_, K, V>

An iterator visiting all values in arbitrary order.

pub fn values_mut(&mut self) -> ValuesMut<'_, K, V>

An iterator visiting all values mutably in arbitrary order.

pub fn into_values(self) -> IntoValues<K, V>

A consuming iterator visiting all values in arbitrary order.

pub const fn len(&self) -> usize

Returns the number of elements in the collection.

pub const fn is_empty(&self) -> bool

Returns true if the collection contains no elements.

Trait Implementations

impl<K: Clone, V: Clone, const SZ: usize, const LTSZ: usize, CM: Clone> Clone for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

fn clone(&self) -> InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K, V, const SZ: usize, const LTSZ: usize, CM> Debug for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where K: Debug, V: Debug, CM: CollectionMagnitude,

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

Formats the value using the given formatter.

impl<K, V, Q, const SZ: usize, const LTSZ: usize, CM> Index<&Q> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where Q: Comparable<K> + Scalar, CM: CollectionMagnitude,

type Output = V

The returned type after indexing.

fn index(&self, index: &Q) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<'a, K, V, const SZ: usize, const LTSZ: usize, CM> IntoIterator for &'a InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

type Item = (&'a K, &'a V)

The type of the elements being iterated over.

type IntoIter = Iter<'a, K, V>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'a, K, V, const SZ: usize, const LTSZ: usize, CM> IntoIterator for &'a mut InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

type Item = (&'a K, &'a mut V)

The type of the elements being iterated over.

type IntoIter = IterMut<'a, K, V>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<K, V, const SZ: usize, const LTSZ: usize, CM> IntoIterator for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

type Item = (K, V)

The type of the elements being iterated over.

type IntoIter = IntoIter<K, V>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<K, V, const SZ: usize, const LTSZ: usize, CM> Len for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

fn len(&self) -> usize

Returns the number of elements in the collection.

fn is_empty(&self) -> bool

Returns true if the collection contains no elements.

impl<K, V, Q, const SZ: usize, const LTSZ: usize, CM> MapExtras<K, V, Q> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude, Q: Scalar + Comparable<K>,

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

Returns the key-value pair corresponding to the supplied key.

fn get_disjoint_mut<const N: usize>( &mut self, keys: [&Q; N], ) -> [Option<&mut V>; N]

where Q: Eq,

Gets multiple mutable values from the map.

unsafe fn get_disjoint_unchecked_mut<const N: usize>( &mut self, keys: [&Q; N], ) -> [Option<&mut V>; N]

Safety

impl<K, V, const SZ: usize, const LTSZ: usize, CM> MapIteration<K, V> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude,

type Iterator<'a> = Iter<'a, K, V> where K: 'a, V: 'a, CM: 'a

The type of the iterator returned by Self::iter.

type KeyIterator<'a> = Keys<'a, K, V> where K: 'a, V: 'a, CM: 'a

The type of the iterator returned by Self::keys.

type ValueIterator<'a> = Values<'a, K, V> where K: 'a, V: 'a, CM: 'a

The type of the iterator returned by Self::values.

type MutIterator<'a> = IterMut<'a, K, V> where K: 'a, V: 'a, CM: 'a

The type of the mutable iterator returned by Self::iter_mut.

type ValueMutIterator<'a> = ValuesMut<'a, K, V> where K: 'a, V: 'a, CM: 'a

The type of the mutable iterator returned by Self::values_mut.

type IntoKeyIterator = IntoKeys<K, V>

The type of the iterator returned by Self::into_keys.

type IntoValueIterator = IntoValues<K, V>

The type of the iterator returned by Self::into_values.

fn iter(&self) -> Self::Iterator<'_>

An iterator visiting all entries in arbitrary order.

fn iter_mut(&mut self) -> Self::MutIterator<'_>

An iterator producing mutable references to all entries in arbitrary order.

fn keys(&self) -> Self::KeyIterator<'_>

An iterator visiting all keys in arbitrary order.

fn into_keys(self) -> Self::IntoKeyIterator

A consuming iterator visiting all keys in arbitrary order.

fn values(&self) -> Self::ValueIterator<'_>

An iterator visiting all values in arbitrary order.

fn values_mut(&mut self) -> Self::ValueMutIterator<'_>

An iterator visiting all values mutably in arbitrary order.

fn into_values(self) -> Self::IntoValueIterator

A consuming iterator visiting all values in arbitrary order.

impl<K, V, Q, const SZ: usize, const LTSZ: usize, CM> MapQuery<Q, V> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude, Q: Scalar + Comparable<K>,

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

Returns a reference to the value corresponding to the key.

fn get_mut(&mut self, key: &Q) -> Option<&mut V>

Returns a mutable reference to the value corresponding to the key.

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

Returns true if the map contains a value for the specified key.

impl<K, V, MT, const SZ: usize, const LTSZ: usize, CM> PartialEq<MT> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where K: Scalar, V: PartialEq, MT: MapQuery<K, V>, CM: CollectionMagnitude,

fn eq(&self, other: &MT) -> 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, const SZ: usize, const LTSZ: usize, CM> Serialize for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where K: Serialize, V: Serialize, CM: CollectionMagnitude,

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<K, V, const SZ: usize, const LTSZ: usize, CM> Eq for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where K: Scalar, V: Eq, CM: CollectionMagnitude,

impl<K, V, Q, const SZ: usize, const LTSZ: usize, CM> Map<K, V, Q> for InlineSparseScalarLookupMap<K, V, SZ, LTSZ, CM>

where CM: CollectionMagnitude, Q: Scalar + Comparable<K>,