Struct rustc::ty::ProjectionPredicate

pub struct ProjectionPredicate<'tcx> {
    pub projection_ty: ProjectionTy<'tcx>,
    pub ty: Ty<'tcx>,
}

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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: ProjectionTy<'tcx>

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ty: Ty<'tcx>

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Trait Implementations

impl<'tcx> HashStable<StableHashingContext<'tcx>> for ProjectionPredicate<'tcx>

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

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

type Lifted = ProjectionPredicate<'tcx>

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fn lift_to_tcx<'b, 'gcx>(
    &self,
    tcx: TyCtxt<'b, 'gcx, 'tcx>
) -> Option<ProjectionPredicate<'tcx>>

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

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

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

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

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

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fn has_regions_escaping_depth(&self, depth: u32) -> bool

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fn has_escaping_regions(&self) -> bool

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fn has_type_flags(&self, flags: TypeFlags) -> bool

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fn has_projections(&self) -> bool

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fn references_error(&self) -> bool

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fn has_param_types(&self) -> bool

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fn has_self_ty(&self) -> bool

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fn has_infer_types(&self) -> bool

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fn needs_infer(&self) -> bool

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fn needs_subst(&self) -> bool

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fn has_re_skol(&self) -> bool

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fn has_closure_types(&self) -> bool

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fn has_erasable_regions(&self) -> bool

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fn is_normalized_for_trans(&self) -> bool

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fn is_global(&self) -> bool

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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Errs on the side of returning false.

impl<'tcx> Copy for ProjectionPredicate<'tcx>

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> PartialEq for ProjectionPredicate<'tcx>

fn eq(&self, __arg_0: &ProjectionPredicate<'tcx>) -> bool

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

fn ne(&self, __arg_0: &ProjectionPredicate<'tcx>) -> bool

This method tests for !=.

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

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

fn hash<__H: Hasher>(&self, __arg_0: &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<'tcx> Encodable for ProjectionPredicate<'tcx>

fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>

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impl<'tcx> Decodable for ProjectionPredicate<'tcx>

fn decode<__D: Decoder>(
    __arg_0: &mut __D
) -> Result<ProjectionPredicate<'tcx>, __D::Error>

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impl<'tcx> Print for ProjectionPredicate<'tcx>

fn print<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_to_string(&self, cx: &mut PrintContext) -> String

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fn print_display<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_display_to_string(&self, cx: &mut PrintContext) -> String

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fn print_debug<F: Write>(&self, f: &mut F, cx: &mut PrintContext) -> Result

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fn print_debug_to_string(&self, cx: &mut PrintContext) -> String

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

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

Formats the value using the given formatter.

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

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

Formats the value using the given formatter.