Struct rustc_middle::ty::Predicate

pub struct Predicate<'tcx> {
    inner: &'tcx PredicateInner<'tcx>,
}

Fields

inner: &'tcx PredicateInner<'tcx>

Implementations

impl<'tcx> Predicate<'tcx>

pub fn kind(self) -> Binder<'tcx, PredicateKind<'tcx>>

Gets the inner Binder<'tcx, PredicateKind<'tcx>>.

impl<'tcx> Predicate<'tcx>

pub fn subst_supertrait(
    self,
    tcx: TyCtxt<'tcx>,
    trait_ref: &PolyTraitRef<'tcx>
) -> Predicate<'tcx>

Performs a substitution suitable for going from a poly-trait-ref to supertraits that must hold if that poly-trait-ref holds. This is slightly different from a normal substitution in terms of what happens with bound regions. See lengthy comment below for details.

impl<'tcx> Predicate<'tcx>

pub fn to_opt_poly_trait_ref(self) -> Option<ConstnessAnd<PolyTraitRef<'tcx>>>

pub fn to_opt_type_outlives(self) -> Option<PolyTypeOutlivesPredicate<'tcx>>

Trait Implementations

impl<'tcx> Clone for Predicate<'tcx>

fn clone(&self) -> Predicate<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for Predicate<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for Predicate<'tcx>

fn decode(decoder: &mut D) -> Result<Predicate<'tcx>, D::Error>

impl<'tcx> Display for Predicate<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, E: TyEncoder<'tcx>> Encodable<E> for Predicate<'tcx>

fn encode(&self, e: &mut E) -> Result<(), E::Error>

impl Hash for Predicate<'_>

fn hash<H: Hasher>(&self, s: &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<'a, 'tcx> HashStable<StableHashingContext<'a>> for Predicate<'tcx>

fn hash_stable(
    &self,
    hcx: &mut StableHashingContext<'a>,
    hasher: &mut StableHasher
)

impl<'tcx, '__lifted> Lift<'__lifted> for Predicate<'tcx>

type Lifted = Predicate<'__lifted>

fn lift_to_tcx(self, __tcx: TyCtxt<'__lifted>) -> Option<Predicate<'__lifted>>

impl<'tcx> PartialEq<Predicate<'tcx>> for Predicate<'tcx>

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

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

#[must_use]

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

This method tests for !=.

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

type Output = P

type Error = Error

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

impl<'tcx> TypeFoldable<'tcx> for Predicate<'tcx>

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

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

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

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_type_flags(&self, flags: TypeFlags) -> bool

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

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_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.

impl<'tcx> Copy for Predicate<'tcx>

impl<'tcx> Eq for Predicate<'tcx>