Struct rustc::ty::subst::Kind

pub struct Kind<'tcx> { /* fields omitted */ }

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An entity in the Rust typesystem, which can be one of several kinds (only types and lifetimes for now). To reduce memory usage, a Kind is a interned pointer, with the lowest 2 bits being reserved for a tag to indicate the type (Ty or Region) it points to.

Methods

impl<'tcx> Kind<'tcx>

pub fn as_type(self) -> Option<Ty<'tcx>>

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pub fn as_region(self) -> Option<Region<'tcx>>

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Trait Implementations

impl<'gcx> HashStable<StableHashingContext<'gcx>> for Kind<'gcx>

fn hash_stable<W: StableHasherResult>(
    &self,
    hcx: &mut StableHashingContext<'gcx>,
    hasher: &mut StableHasher<W>
)

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impl<'tcx> Copy for Kind<'tcx>

impl<'tcx> Clone for Kind<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> PartialEq for Kind<'tcx>

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

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

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

This method tests for !=.

impl<'tcx> Eq for Kind<'tcx>

impl<'tcx> Hash for Kind<'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> From<Ty<'tcx>> for Kind<'tcx>

fn from(ty: Ty<'tcx>) -> Kind<'tcx>

Performs the conversion.

impl<'tcx> From<Region<'tcx>> for Kind<'tcx>

fn from(r: Region<'tcx>) -> Kind<'tcx>

Performs the conversion.

impl<'tcx> Debug for Kind<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Display for Kind<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> TypeFoldable<'tcx> for Kind<'tcx>

fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
    &self,
    folder: &mut F
) -> 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> Encodable for Kind<'tcx>

fn encode<E: Encoder>(&self, e: &mut E) -> Result<(), E::Error>

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impl<'tcx> Decodable for Kind<'tcx>

fn decode<D: Decoder>(d: &mut D) -> Result<Kind<'tcx>, D::Error>

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