Struct rustc_middle::ty::TraitPredicate

pub struct TraitPredicate<'tcx> {
    pub trait_ref: TraitRef<'tcx>,
    pub polarity: ImplPolarity,
}

Fields

trait_ref: TraitRef<'tcx>

polarity: ImplPolarity

If polarity is Positive: we are proving that the trait is implemented.

If polarity is Negative: we are proving that a negative impl of this trait exists. (Note that coherence also checks whether negative impls of supertraits exist via a series of predicates.)

If polarity is Reserved: that’s a bug.

Implementations

impl<'tcx> TraitPredicate<'tcx>

pub fn print_modifiers_and_trait_path( self ) -> TraitPredPrintModifiersAndPath<'tcx>

impl<'tcx> TraitPredicate<'tcx>

pub fn with_self_ty(self, tcx: TyCtxt<'tcx>, self_ty: Ty<'tcx>) -> Self

pub fn def_id(self) -> DefId

pub fn self_ty(self) -> Ty<'tcx>

Trait Implementations

impl<'tcx> Clone for TraitPredicate<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for TraitPredicate<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for TraitPredicate<'tcx>

fn decode(__decoder: &mut __D) -> Self

impl<'tcx> Display for TraitPredicate<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for TraitPredicate<'tcx>

fn encode(&self, __encoder: &mut __E)

impl<'tcx> Hash for TraitPredicate<'tcx>

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for TraitPredicate<'tcx>

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

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

type Lifted = TraitPredicate<'__lifted>

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

impl<'tcx> PartialEq<TraitPredicate<'tcx>> for TraitPredicate<'tcx>

fn eq(&self, other: &TraitPredicate<'tcx>) -> 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<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for TraitPredicate<'tcx>

type Output = P

type Error = Error

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

impl<'tcx> Relate<'tcx> for TraitPredicate<'tcx>

fn relate<R: TypeRelation<'tcx>>( relation: &mut R, a: TraitPredicate<'tcx>, b: TraitPredicate<'tcx> ) -> RelateResult<'tcx, TraitPredicate<'tcx>>

impl<'tcx> ToPredicate<'tcx, Clause<'tcx>> for TraitPredicate<'tcx>

fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Clause<'tcx>

impl<'tcx> ToPredicate<'tcx, Predicate<'tcx>> for TraitPredicate<'tcx>

fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Predicate<'tcx>

impl<'tcx> ToPredicate<'tcx, TraitPredicate<'tcx>> for TraitRef<'tcx>

fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> TraitPredicate<'tcx>

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TraitPredicate<'tcx>

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for TraitPredicate<'tcx>

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl<'tcx> Copy for TraitPredicate<'tcx>

impl<'tcx> Eq for TraitPredicate<'tcx>

impl<'tcx> StructuralEq for TraitPredicate<'tcx>

impl<'tcx> StructuralPartialEq for TraitPredicate<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes