Struct ProjectionPredicate

pub struct ProjectionPredicate<I: Interner> {
    pub projection_term: AliasTerm<I>,
    pub term: I::Term,
}

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_term: AliasTerm<I>

term: I::Term

Implementations

impl<I: Interner> ProjectionPredicate<I>

pub fn self_ty(self) -> I::Ty

pub fn with_self_ty(self, interner: I, self_ty: I::Ty) -> ProjectionPredicate<I>

pub fn trait_def_id(self, interner: I) -> I::DefId

pub fn def_id(self) -> I::DefId

Trait Implementations

impl<I> Clone for ProjectionPredicate<I>

where I: Interner,

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Interner> Debug for ProjectionPredicate<I>

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

Formats the value using the given formatter.

impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for ProjectionPredicate<I>

where AliasTerm<I>: Decodable<__D>, I::Term: Decodable<__D>,

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

impl<I: Interner> Display for ProjectionPredicate<I>

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

Formats the value using the given formatter.

impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for ProjectionPredicate<I>

where AliasTerm<I>: Encodable<__E>, I::Term: Encodable<__E>,

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

impl<I> Hash for ProjectionPredicate<I>

where I: Interner,

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<I: Interner, __CTX> HashStable<__CTX> for ProjectionPredicate<I>

where AliasTerm<I>: HashStable<__CTX>, I::Term: HashStable<__CTX>,

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

impl<I, J> Lift<J> for ProjectionPredicate<I>

where I: Interner, J: Interner, AliasTerm<I>: Lift<J, Lifted = AliasTerm<J>>, I::Term: Lift<J, Lifted = J::Term>,

type Lifted = ProjectionPredicate<J>

fn lift_to_interner(self, interner: J) -> Option<Self::Lifted>

impl<I> PartialEq for ProjectionPredicate<I>

where I: Interner,

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<I> TypeFoldable<I> for ProjectionPredicate<I>

where I: Interner, AliasTerm<I>: TypeFoldable<I>, I::Term: TypeFoldable<I>,

fn try_fold_with<__F: FallibleTypeFolder<I>>( 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: TypeFolder<I>>(self, folder: &mut F) -> Self

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<I> TypeVisitable<I> for ProjectionPredicate<I>

where I: Interner, AliasTerm<I>: TypeVisitable<I>, I::Term: TypeVisitable<I>,

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

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

impl<I> Copy for ProjectionPredicate<I>

where I: Interner,

impl<I> Eq for ProjectionPredicate<I>

where I: Interner,

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.