Struct chalk_ir::Lifetime

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

A Rust lifetime.

Implementations

impl<I: Interner> Lifetime<I>

pub fn new(interner: &I, data: impl CastTo<LifetimeData<I>>) -> Self

Create a lifetime from lifetime data (or something that can be cast to lifetime data).

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

Gets the interned value.

pub fn data(&self, interner: &I) -> &LifetimeData<I>

Gets the lifetime data.

pub fn bound_var(&self, interner: &I) -> Option<BoundVar>

If this is a Lifetime::BoundVar(d), returns Some(d) else None.

pub fn inference_var(&self, interner: &I) -> Option<InferenceVar>

If this is a Lifetime::InferenceVar(d), returns Some(d) else None.

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

True if this lifetime is a “bound” lifetime, and hence needs to be shifted across binders. Meant for debug assertions.

Trait Implementations

impl<I: Interner> CastTo<GenericArg<I>> for Lifetime<I>

fn cast_to(self, interner: &I) -> GenericArg<I>

Cast a value to type T.

impl<I: Clone + Interner> Clone for Lifetime<I> where
    I::InternedLifetime: Clone, 

fn clone(&self) -> Lifetime<I>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Interner> Debug for Lifetime<I>

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

Formats the value using the given formatter.

impl<I: Interner> Fold<I> for Lifetime<I>

“Folding” a lifetime invokes the fold_lifetime method on the folder; this usually (in turn) invokes super_fold_lifetime to fold the individual parts.

type Result = Lifetime<I>

The type of value that will be produced once folding is done. Typically this is Self, unless Self contains borrowed values, in which case owned values are produced (for example, one can fold over a &T value where T: Fold, in which case you get back a T, not a &T).

fn fold_with<'i>(
    self,
    folder: &mut dyn Folder<'i, I>,
    outer_binder: DebruijnIndex
) -> Fallible<Self::Result> where
    I: 'i, 

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.

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

type Interner = I

The interner associated with the type.

impl<I: Hash + Interner> Hash for Lifetime<I> where
    I::InternedLifetime: Hash, 

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<I: Ord + Interner> Ord for Lifetime<I> where
    I::InternedLifetime: Ord, 

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

This method returns an Ordering between self and other.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

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

Restrict a value to a certain interval.

impl<I: PartialEq + Interner> PartialEq<Lifetime<I>> for Lifetime<I> where
    I::InternedLifetime: PartialEq, 

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

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

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

This method tests for !=.

impl<I: PartialOrd + Interner> PartialOrd<Lifetime<I>> for Lifetime<I> where
    I::InternedLifetime: PartialOrd, 

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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> SuperFold<I> for Lifetime<I> where
    I: Interner, 

fn super_fold_with<'i>(
    self,
    folder: &mut dyn Folder<'i, I>,
    outer_binder: DebruijnIndex
) -> Fallible<Lifetime<I>> where
    I: 'i, 

Recursively folds the value.

impl<I: Interner> SuperVisit<I> for Lifetime<I>

fn super_visit_with<'i, B>(
    &self,
    visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
    outer_binder: DebruijnIndex
) -> ControlFlow<B> where
    I: 'i, 

Recursively visits the type contents.

impl<I: Interner> Visit<I> for Lifetime<I>

fn visit_with<'i, B>(
    &self,
    visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
    outer_binder: DebruijnIndex
) -> ControlFlow<B> where
    I: 'i, 

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 Lifetime<I>

fn zip_with<'i, Z: Zipper<'i, I>>(
    zipper: &mut Z,
    variance: Variance,
    a: &Self,
    b: &Self
) -> Fallible<()> where
    I: 'i, 

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

impl<I: Copy + Interner> Copy for Lifetime<I> where
    I::InternedLifetime: Copy, 

impl<I: Eq + Interner> Eq for Lifetime<I> where
    I::InternedLifetime: Eq, 

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

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