Struct OptionalDict 

pub struct OptionalDict<K, V> { /* private fields */ }

A dictionary where keys may or may not have values

Implementations

impl<K, V> OptionalDict<K, V>

pub fn new() -> Self

Create a new empty OptionalDict

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl<K, V: Clone> Clone for OptionalDict<K, V>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: DictKey, V: Debug> Debug for OptionalDict<K, V>

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

Formats the value using the given formatter.

impl<K, V> Default for OptionalDict<K, V>

fn default() -> Self

Returns the “default value” for a type.

impl<K: DictKey, V: Display> Display for OptionalDict<K, V>

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

Formats the value using the given formatter.

impl<K: DictKey + FromStr<Err: Debug>, V, F: Fn(K) -> Option<V>> From<F> for OptionalDict<K, V>

fn from(f: F) -> Self

Converts to this type from the input type.

impl<K, V: Hash> Hash for OptionalDict<K, V>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<K: DictKey, V> Index<K> for OptionalDict<K, V>

type Output = Option<V>

The returned type after indexing.

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

Performs the indexing (container[index]) operation.

impl<K: DictKey, V> IndexMut<K> for OptionalDict<K, V>

fn index_mut(&mut self, key: K) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.

impl<K, V: Ord> Ord for OptionalDict<K, V>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<K, V: PartialEq> PartialEq for OptionalDict<K, V>

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: PartialOrd> PartialOrd for OptionalDict<K, V>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<K, V: Eq> Eq for OptionalDict<K, V>