Struct chalk_ir::PlaceholderIndex

pub struct PlaceholderIndex {
    pub ui: UniverseIndex,
    pub idx: usize,
}

Index of an universally quantified parameter in the environment. Two indexes are required, the one of the universe itself and the relative index inside the universe.

Fields

ui: UniverseIndex

Index of the universe.

idx: usize

Index in the universe.

Implementations

impl PlaceholderIndex

pub fn to_lifetime<I: Interner>(self, interner: I) -> Lifetime<I>

Wrap the placeholder instance in a lifetime.

pub fn to_ty<I: Interner>(self, interner: I) -> Ty<I>

Create an interned type.

pub fn to_const<I: Interner>(self, interner: I, ty: Ty<I>) -> Const<I>

Wrap the placeholder index in a constant.

Trait Implementations

impl Clone for PlaceholderIndex

fn clone(&self) -> PlaceholderIndex

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PlaceholderIndex

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

Formats the value using the given formatter.

impl Hash for PlaceholderIndex

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,

Feeds a slice of this type into the given Hasher.

impl Ord for PlaceholderIndex

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<PlaceholderIndex> for PlaceholderIndex

fn eq(&self, other: &PlaceholderIndex) -> bool

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<PlaceholderIndex> for PlaceholderIndex

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

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

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

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

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

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

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

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

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

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

impl<I: Interner> TypeFoldable<I> for PlaceholderIndex

fn try_fold_with<E>(
    self,
    _folder: &mut dyn FallibleTypeFolder<I, Error = E>,
    _outer_binder: DebruijnIndex
) -> Result<Self, E>

Apply the given folder folder to self; binders is the number of binders that are in scope when beginning the folder. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.

fn fold_with(
    self,
    folder: &mut dyn TypeFolder<I>,
    outer_binder: DebruijnIndex
) -> Self

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<I: Interner> TypeVisitable<I> for PlaceholderIndex

fn visit_with<B>(
    &self,
    _visitor: &mut dyn TypeVisitor<I, BreakTy = B>,
    _outer_binder: DebruijnIndex
) -> ControlFlow<B>

Apply the given visitor visitor to self; binders is the number of binders that are in scope when beginning the visitor. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.

impl<I: Interner> Zip<I> for PlaceholderIndex

fn zip_with<Z: Zipper<I>>(
    _zipper: &mut Z,
    _variance: Variance,
    a: &Self,
    b: &Self
) -> Fallible<()>

Uses the zipper to walk through two values, ensuring that they match.

impl Copy for PlaceholderIndex

impl Eq for PlaceholderIndex

impl StructuralEq for PlaceholderIndex

impl StructuralPartialEq for PlaceholderIndex