Enum rustc_middle::ty::ExistentialPredicate

pub enum ExistentialPredicate<'tcx> {
    Trait(ExistentialTraitRef<'tcx>),
    Projection(ExistentialProjection<'tcx>),
    AutoTrait(DefId),
}

Variants

Trait(ExistentialTraitRef<'tcx>)

E.g., Iterator.

Projection(ExistentialProjection<'tcx>)

E.g., Iterator::Item = T.

AutoTrait(DefId)

E.g., Send.

Implementations

impl<'tcx> ExistentialPredicate<'tcx>

pub fn stable_cmp(&self, tcx: TyCtxt<'tcx>, other: &Self) -> Ordering

Compares via an ordering that will not change if modules are reordered or other changes are made to the tree. In particular, this ordering is preserved across incremental compilations.

Trait Implementations

impl<'tcx> Clone for ExistentialPredicate<'tcx>

pub fn clone(&self) -> ExistentialPredicate<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for ExistentialPredicate<'tcx>

impl<'tcx> Debug for ExistentialPredicate<'tcx>

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

Formats the value using the given formatter.

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

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

impl<'tcx> Display for ExistentialPredicate<'tcx>

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

Formats the value using the given formatter.

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

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

impl<'tcx> Eq for ExistentialPredicate<'tcx>

impl<'tcx> Hash for ExistentialPredicate<'tcx>

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<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for ExistentialPredicate<'tcx>

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

impl<'a, 'tcx> Lift<'tcx> for ExistentialPredicate<'a>

type Lifted = ExistentialPredicate<'tcx>

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

impl<'tcx> Ord for ExistentialPredicate<'tcx>

pub fn cmp(&self, other: &ExistentialPredicate<'tcx>) -> 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<'tcx> PartialEq<ExistentialPredicate<'tcx>> for ExistentialPredicate<'tcx>

pub fn eq(&self, other: &ExistentialPredicate<'tcx>) -> bool

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

pub fn ne(&self, other: &ExistentialPredicate<'tcx>) -> bool

This method tests for !=.

impl<'tcx> PartialOrd<ExistentialPredicate<'tcx>> for ExistentialPredicate<'tcx>

pub fn partial_cmp(
    &self,
    other: &ExistentialPredicate<'tcx>
) -> Option<Ordering>

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

pub fn lt(&self, other: &ExistentialPredicate<'tcx>) -> bool

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

pub fn le(&self, other: &ExistentialPredicate<'tcx>) -> bool

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

pub fn gt(&self, other: &ExistentialPredicate<'tcx>) -> bool

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

pub fn ge(&self, other: &ExistentialPredicate<'tcx>) -> bool

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

impl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ExistentialPredicate<'tcx>

type Output = P

type Error = Error

pub fn print(&self, cx: P) -> Result<Self::Output, Self::Error>

impl<'tcx> StructuralEq for ExistentialPredicate<'tcx>

impl<'tcx> StructuralPartialEq for ExistentialPredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ExistentialPredicate<'tcx>

pub fn super_fold_with<__F: TypeFolder<'tcx>>(self, __folder: &mut __F) -> Self

pub fn super_visit_with<__F: TypeVisitor<'tcx>>(
    &self,
    __folder: &mut __F
) -> ControlFlow<__F::BreakTy>

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

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

pub 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.

pub 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).

pub fn has_escaping_bound_vars(&self) -> bool

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

pub fn has_projections(&self) -> bool

pub fn has_opaque_types(&self) -> bool

pub fn references_error(&self) -> bool

pub fn has_param_types_or_consts(&self) -> bool

pub fn has_infer_regions(&self) -> bool

pub fn has_infer_types(&self) -> bool

pub fn has_infer_types_or_consts(&self) -> bool

pub fn needs_infer(&self) -> bool

pub fn has_placeholders(&self) -> bool

pub fn needs_subst(&self) -> bool

pub 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.

pub fn has_erased_regions(&self) -> bool

pub fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

pub 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.

pub fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

pub 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.