Struct AssocMap 

pub struct AssocMap<K: PartialEq, V> { /* private fields */ }

A simple association map with ordered insertion semantics.

Keys are maintained in insertion order; operations are O(n). Suitable for small collections used in elaboration.

Implementations

impl<K: PartialEq, V> AssocMap<K, V>

pub fn new() -> Self

Create an empty AssocMap.

pub fn with_capacity(cap: usize) -> Self

Create an AssocMap with initial capacity.

pub fn insert(&mut self, key: K, value: V)

where K: Clone, V: Clone,

Insert or update a key-value pair.

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

Look up a key.

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

Remove a key, returning its value.

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

Check whether a key is present.

pub fn len(&self) -> usize

Number of entries.

pub fn is_empty(&self) -> bool

Returns true if empty.

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

Iterate over key-value pairs.

pub fn keys(&self) -> Vec<&K>

Collect all keys.

pub fn values(&self) -> Vec<&V>

Collect all values.

pub fn map_values<W>(self, f: impl Fn(V) -> W) -> AssocMap<K, W>

Map all values in place.

pub fn retain_keys(&mut self, pred: impl Fn(&K) -> bool)

Remove all entries where the predicate on keys returns false.

Trait Implementations

impl<K: Clone + PartialEq, V: Clone> Clone for AssocMap<K, V>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: Debug + PartialEq, V: Debug> Debug for AssocMap<K, V>

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

Formats the value using the given formatter.

impl<K: Default + PartialEq, V: Default> Default for AssocMap<K, V>

fn default() -> AssocMap<K, V>

Returns the “default value” for a type.

impl<K: PartialEq + Clone, V: Clone> FromIterator<(K, V)> for AssocMap<K, V>

fn from_iter<I: IntoIterator<Item = (K, V)>>(iter: I) -> Self

Creates a value from an iterator.