Enum chalk_ir::LifetimeData

pub enum LifetimeData<I: Interner> {
    BoundVar(BoundVar),
    InferenceVar(InferenceVar),
    Placeholder(PlaceholderIndex),
    Static,
    Empty(UniverseIndex),
    Erased,
    Phantom(Void, PhantomData<I>),
}

Lifetime data, including what kind of lifetime it is and what it points to.

Variants

BoundVar(BoundVar)

See TyKind::BoundVar.

InferenceVar(InferenceVar)

Lifetime whose value is being inferred.

Placeholder(PlaceholderIndex)

Lifetime on some yet-unknown placeholder.

Static

Static lifetime

Empty(UniverseIndex)

An empty lifetime: a lifetime shorter than any other lifetime in a universe with a lesser or equal index. The universe only non-zero in lexical region resolve in rustc, so chalk shouldn’t ever see a non-zero index.

Erased

An erased lifetime, used by rustc to improve caching when we doesn’t care about lifetimes

Phantom(Void, PhantomData<I>)

Lifetime on phantom data.

Implementations

impl<I: Interner> LifetimeData<I>

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

Wrap the lifetime data in a lifetime.

Trait Implementations

impl<I: Interner> CastTo<LifetimeData<I>> for LifetimeData<I>

fn cast_to(
    self,
    _interner: <LifetimeData<I> as HasInterner>::Interner
) -> LifetimeData<I>

Cast a value to type T.

impl<I: Clone + Interner> Clone for LifetimeData<I>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

Formats the value using the given formatter.

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

type Interner = I

The interner associated with the type.

impl<I: Hash + Interner> Hash for LifetimeData<I>

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 LifetimeData<I>

fn cmp(&self, other: &LifetimeData<I>) -> 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<I: PartialEq + Interner> PartialEq<LifetimeData<I>> for LifetimeData<I>

fn eq(&self, other: &LifetimeData<I>) -> 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<I: PartialOrd + Interner> PartialOrd<LifetimeData<I>> for LifetimeData<I>

fn partial_cmp(&self, other: &LifetimeData<I>) -> 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: Copy + Interner> Copy for LifetimeData<I>

impl<I: Eq + Interner> Eq for LifetimeData<I>

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

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