Struct chalk_ir::Variances

pub struct Variances<I: Interner> { /* fields omitted */ }

List of variable kinds with universe index. Wraps InternedCanonicalVarKinds.

Implementations

impl<I: Interner> Variances<I>

pub fn empty(interner: &I) -> Self

Creates an empty list of canonical variable kinds.

pub fn interned(&self) -> &I::InternedVariances

Get the interned canonical variable kinds.

pub fn from(interner: &I, variances: impl IntoIterator<Item = Variance>) -> Self

Creates a list of canonical variable kinds using an iterator.

pub fn from_fallible<E>(
    interner: &I,
    variances: impl IntoIterator<Item = Result<Variance, E>>
) -> Result<Self, E>

Tries to create a list of canonical variable kinds using an iterator.

pub fn from1(interner: &I, variance: Variance) -> Self

Creates a list of canonical variable kinds from a single canonical variable kind.

pub fn iter(&self, interner: &I) -> Iter<'_, Variance>

Get an iterator over the list of canonical variable kinds.

pub fn is_empty(&self, interner: &I) -> bool

Checks whether the list of canonical variable kinds is empty.

pub fn len(&self, interner: &I) -> usize

Returns the number of canonical variable kinds.

pub fn as_slice(&self, interner: &I) -> &[Variance]

Returns a slice containing the canonical variable kinds.

Trait Implementations

impl<I: Clone + Interner> Clone for Variances<I> where
    I::InternedVariances: Clone, 

pub fn clone(&self) -> Variances<I>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Copy + Interner> Copy for Variances<I> where
    I::InternedVariances: Copy, 

impl<I: Eq + Interner> Eq for Variances<I> where
    I::InternedVariances: Eq, 

impl<I: Interner> HasInterner for Variances<I>

type Interner = I

The interner associated with the type.

impl<I: Hash + Interner> Hash for Variances<I> where
    I::InternedVariances: Hash, 

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl<I: Ord + Interner> Ord for Variances<I> where
    I::InternedVariances: Ord, 

pub fn cmp(&self, other: &Variances<I>) -> Ordering

This method returns an Ordering between self and other.

#[must_use]pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<I: PartialEq + Interner> PartialEq<Variances<I>> for Variances<I> where
    I::InternedVariances: PartialEq, 

pub fn eq(&self, other: &Variances<I>) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &Variances<I>) -> bool

This method tests for !=.

impl<I: PartialOrd + Interner> PartialOrd<Variances<I>> for Variances<I> where
    I::InternedVariances: PartialOrd, 

pub fn partial_cmp(&self, other: &Variances<I>) -> Option<Ordering>

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

pub fn lt(&self, other: &Variances<I>) -> bool

This method tests less than (for self and other) and is used by the < operator.

pub fn le(&self, other: &Variances<I>) -> bool

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

pub fn gt(&self, other: &Variances<I>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

pub fn ge(&self, other: &Variances<I>) -> bool

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

impl<I: Interner> StructuralEq for Variances<I>

impl<I: Interner> StructuralPartialEq for Variances<I>