Enum rustc_middle::ty::BoundRegion

pub enum BoundRegion {
    BrAnon(u32),
    BrNamed(DefId, Symbol),
    BrEnv,
}

Variants

BrAnon(u32)

An anonymous region parameter for a given fn (&T)

BrNamed(DefId, Symbol)

Named region parameters for functions (a in &'a T)

The DefId is needed to distinguish free regions in the event of shadowing.

BrEnv

Anonymous region for the implicit env pointer parameter to a closure

Implementations

impl BoundRegion

pub fn is_named(&self) -> bool

pub fn assert_bound_var(&self) -> BoundVar

When canonicalizing, we replace unbound inference variables and free regions with anonymous late bound regions. This method asserts that we have an anonymous late bound region, which hence may refer to a canonical variable.

Trait Implementations

impl Clone for BoundRegion

fn clone(&self) -> BoundRegion

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for BoundRegion

impl Debug for BoundRegion

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for BoundRegion

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for BoundRegion

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl Eq for BoundRegion

impl Hash for BoundRegion

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<'__ctx> HashStable<StableHashingContext<'__ctx>> for BoundRegion

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'tcx> Lift<'tcx> for BoundRegion

type Lifted = Self

fn lift_to_tcx(self, _: TyCtxt<'tcx>) -> Option<Self>

impl Ord for BoundRegion

fn cmp(&self, other: &BoundRegion) -> 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

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

Restrict a value to a certain interval.

impl PartialEq<BoundRegion> for BoundRegion

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

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

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

This method tests for !=.

impl PartialOrd<BoundRegion> for BoundRegion

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

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

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

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

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

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

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

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

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

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

impl StructuralEq for BoundRegion

impl StructuralPartialEq for BoundRegion

impl<'tcx> TypeFoldable<'tcx> for BoundRegion

fn super_fold_with<F: TypeFolder<'tcx>>(&self, _: &mut F) -> BoundRegion

fn super_visit_with<F: TypeVisitor<'tcx>>(&self, _: &mut F) -> ControlFlow<()>

fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<()>

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

fn has_free_regions(&self) -> bool

"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only 'global' generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.

fn visit_tys_shallow(
    &self,
    visit: impl FnMut(Ty<'tcx>) -> ControlFlow<()>
) -> ControlFlow<()>

A visitor that does not recurse into types, works like fn walk_shallow in Ty.