Struct NESet 

pub struct NESet<T: Eq + Hash>(/* private fields */);

Non-empty set type.

Implementations

impl<T: Eq + Hash> NESet<T>

pub fn new(head: T, tail: Vec<T>) -> Self

Creates a new NESet, ensuring at least one element is present.

pub fn singleton(value: T) -> Self

Creates a new singleton NESet. Semantically equivalent to:

NESet::new(value, Vec::new());

pub fn from(set: HashSet<T>) -> Result<Self, NonEmptyError>

Creates a new NESet from a HashSet. Returns an error if the set is empty.

pub fn into_set(self) -> HashSet<T>

Extracts the underlying HashSet. This operation is zero-cost.

pub fn len(&self) -> usize

Returns the size of the set.

pub fn is_empty(&self) -> bool

A NESet is always non-empty.

pub fn insert(&mut self, value: T) -> bool

Adds an element to the set. If the element is already present, it is not modified.

pub fn remove(&mut self, value: &T) -> bool

Removes an element from the set. Returns true if the element was present.

pub fn contains(&self, value: &T) -> bool

Checks if the set contains a value.

Trait Implementations

impl<T: Clone + Eq + Hash> Clone for NESet<T>

fn clone(&self) -> NESet<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Eq + Hash> Debug for NESet<T>

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

Formats the value using the given formatter.

impl<T: Eq + Hash> From<NESet<T>> for HashSet<T>

fn from(value: NESet<T>) -> Self

Converts to this type from the input type.

impl<T: Eq + Hash> From<T> for NESet<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<'a, T: Eq + Hash> IntoIterator for &'a NESet<T>

type Item = &'a T

The type of the elements being iterated over.

type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<T: Eq + Hash> IntoIterator for NESet<T>

type Item = T

The type of the elements being iterated over.

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<T: PartialEq + Eq + Hash> PartialEq for NESet<T>

fn eq(&self, other: &NESet<T>) -> 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<T: Eq + Hash> TryFrom<HashSet<T>> for NESet<T>

type Error = NonEmptyError

The type returned in the event of a conversion error.

fn try_from(set: HashSet<T>) -> Result<Self, Self::Error>

Performs the conversion.

impl<T: Eq + Eq + Hash> Eq for NESet<T>

impl<T: Eq + Hash> StructuralPartialEq for NESet<T>