Struct rustc::ty::ExistentialProjection

pub struct ExistentialProjection<'tcx> {
    pub item_def_id: DefId,
    pub substs: &'tcx Substs<'tcx>,
    pub ty: Ty<'tcx>,
}

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A ProjectionPredicate for an ExistentialTraitRef.

Fields

item_def_id: DefId

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substs: &'tcx Substs<'tcx>

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ty: Ty<'tcx>

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Methods

impl<'a, 'tcx, 'gcx> ExistentialProjection<'tcx>

pub fn trait_ref(&self, tcx: TyCtxt) -> ExistentialTraitRef<'tcx>

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Extracts the underlying existential trait reference from this projection. For example, if this is a projection of exists T. <T as Iterator>::Item == X, then this function would return a exists T. T: Iterator existential trait reference.

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

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Trait Implementations

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

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

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impl<'tcx> Relate<'tcx> for ExistentialProjection<'tcx>

fn relate<'a, 'gcx, R>(
    relation: &mut R,
    a: &ExistentialProjection<'tcx>,
    b: &ExistentialProjection<'tcx>
) -> RelateResult<'tcx, ExistentialProjection<'tcx>> where
    R: TypeRelation<'a, 'gcx, 'tcx>,
    'gcx: 'a + 'tcx,
    'tcx: 'a, 

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

type Lifted = ExistentialProjection<'tcx>

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

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impl<'tcx> TypeFoldable<'tcx> for ExistentialProjection<'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> Clone for ExistentialProjection<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for ExistentialProjection<'tcx>

impl<'tcx> PartialEq for ExistentialProjection<'tcx>

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

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

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

This method tests for !=.

impl<'tcx> Eq for ExistentialProjection<'tcx>

impl<'tcx> Hash for ExistentialProjection<'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> Debug for ExistentialProjection<'tcx>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'tcx> Encodable for ExistentialProjection<'tcx>

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

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impl<'tcx> Decodable for ExistentialProjection<'tcx>

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

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