Struct rustc_middle::ty::ProjectionPredicate

pub struct ProjectionPredicate<'tcx> {
    pub projection_ty: AliasTy<'tcx>,
    pub term: Term<'tcx>,
}

This kind of predicate has no direct correspondent in the syntax, but it roughly corresponds to the syntactic forms:

1. T: TraitRef<..., Item = Type>
2. <T as TraitRef<...>>::Item == Type (NYI)

In particular, form #1 is “desugared” to the combination of a normal trait predicate (T: TraitRef<...>) and one of these predicates. Form #2 is a broader form in that it also permits equality between arbitrary types. Processing an instance of Form #2 eventually yields one of these ProjectionPredicate instances to normalize the LHS.

Fields

projection_ty: AliasTy<'tcx>

term: Term<'tcx>

Implementations

impl<'tcx> ProjectionPredicate<'tcx>

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

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

pub fn trait_def_id(self, tcx: TyCtxt<'tcx>) -> DefId

pub fn def_id(self) -> DefId

Trait Implementations

impl<'tcx> Clone for ProjectionPredicate<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for ProjectionPredicate<'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 ProjectionPredicate<'tcx>

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

impl<'tcx> Display for ProjectionPredicate<'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 ProjectionPredicate<'tcx>

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

impl<'tcx> Hash for ProjectionPredicate<'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 ProjectionPredicate<'tcx>

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

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

type Lifted = ProjectionPredicate<'__lifted>

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

impl<'tcx> PartialEq<ProjectionPredicate<'tcx>> for ProjectionPredicate<'tcx>

fn eq(&self, other: &ProjectionPredicate<'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 ProjectionPredicate<'tcx>

type Output = P

type Error = Error

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

impl<'tcx> Relate<'tcx> for ProjectionPredicate<'tcx>

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

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

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

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

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

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

impl<'tcx> Eq for ProjectionPredicate<'tcx>

impl<'tcx> StructuralEq for ProjectionPredicate<'tcx>

impl<'tcx> StructuralPartialEq for ProjectionPredicate<'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