Type Alias TraitPredicate

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pub type TraitPredicate<'tcx> = TraitPredicate<TyCtxt<'tcx>>;

Aliased Type§

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

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§trait_ref: TraitRef<TyCtxt<'tcx>>§polarity: PredicatePolarity

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

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impl<I> TraitPredicate<I>
where I: Interner,

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pub fn with_self_ty( self, interner: I, self_ty: <I as Interner>::Ty, ) -> TraitPredicate<I>

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pub fn def_id(self) -> <I as Interner>::DefId

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pub fn self_ty(self) -> <I as Interner>::Ty

Trait Implementations§

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

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impl<'tcx> PrintTraitPredicateExt<'tcx> for TraitPredicate<'tcx>

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impl<I> Clone for TraitPredicate<I>
where I: Interner,

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<I> Debug for TraitPredicate<I>
where I: Interner,

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

Formats the value using the given formatter. Read more
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impl<I, __D> Decodable<__D> for TraitPredicate<I>
where I: Interner, __D: TyDecoder<I = I>, TraitRef<I>: Decodable<__D>,

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impl<I> Display for TraitPredicate<I>
where I: Interner,

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

Formats the value using the given formatter. Read more
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impl<I, __E> Encodable<__E> for TraitPredicate<I>
where I: Interner, __E: TyEncoder<I = I>, TraitRef<I>: Encodable<__E>,

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

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impl<I> Hash for TraitPredicate<I>
where I: Interner,

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fn hash<__H>(&self, __state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<I, __CTX> HashStable<__CTX> for TraitPredicate<I>
where I: Interner, TraitRef<I>: HashStable<__CTX>,

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fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )

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impl<I, J> Lift<J> for TraitPredicate<I>
where I: Interner, J: Interner, TraitRef<I>: Lift<J, Lifted = TraitRef<J>>, PredicatePolarity: Lift<J, Lifted = PredicatePolarity>,

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impl<I> PartialEq for TraitPredicate<I>
where I: Interner,

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fn eq(&self, __other: &TraitPredicate<I>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<I> Relate<I> for TraitPredicate<I>
where I: Interner,

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fn relate<R>( relation: &mut R, a: TraitPredicate<I>, b: TraitPredicate<I>, ) -> Result<TraitPredicate<I>, TypeError<I>>
where R: TypeRelation<I>,

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impl<I> TypeFoldable<I> for TraitPredicate<I>
where I: Interner, TraitRef<I>: TypeFoldable<I>,

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fn try_fold_with<__F>( self, __folder: &mut __F, ) -> Result<TraitPredicate<I>, <__F as FallibleTypeFolder<I>>::Error>
where __F: FallibleTypeFolder<I>,

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f). Read more
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fn fold_with<F>(self, folder: &mut F) -> Self
where 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.
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impl<I> TypeVisitable<I> for TraitPredicate<I>
where I: Interner, TraitRef<I>: TypeVisitable<I>,

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fn visit_with<__V>( &self, __visitor: &mut __V, ) -> <__V as TypeVisitor<I>>::Result
where __V: TypeVisitor<I>,

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v). Read more
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impl<I> UpcastFrom<I, TraitRef<I>> for TraitPredicate<I>
where I: Interner,

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fn upcast_from(from: TraitRef<I>, _tcx: I) -> TraitPredicate<I>

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impl<I> Copy for TraitPredicate<I>
where I: Interner,

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impl<I> Eq for TraitPredicate<I>
where I: Interner,

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