Struct rustc::infer::canonical::Canonical

pub struct Canonical<'gcx, V> {
    pub variables: CanonicalVarInfos<'gcx>,
    pub value: V,
}

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A "canonicalized" type V is one where all free inference variables have been rewriten to "canonical vars". These are numbered starting from 0 in order of first appearance.

Fields

variables: CanonicalVarInfos<'gcx>

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value: V

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Methods

impl<'tcx, R> Canonical<'tcx, QueryResult<'tcx, R>>

pub fn is_proven(&self) -> bool

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pub fn is_ambiguous(&self) -> bool

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Trait Implementations

impl<'a, 'tcx, V> HashStable<StableHashingContext<'a>> for Canonical<'tcx, V> where     V: HashStable<StableHashingContext<'a>>,

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

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impl<'gcx, V: Copy> Copy for Canonical<'gcx, V>

impl<'gcx, V: Clone> Clone for Canonical<'gcx, V>

fn clone(&self) -> Canonical<'gcx, V>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'gcx, V: Debug> Debug for Canonical<'gcx, V>

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

Formats the value using the given formatter.

impl<'gcx, V: PartialEq> PartialEq for Canonical<'gcx, V>

fn eq(&self, __arg_0: &Canonical<'gcx, V>) -> bool

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

fn ne(&self, __arg_0: &Canonical<'gcx, V>) -> bool

This method tests for !=.

impl<'gcx, V: Eq> Eq for Canonical<'gcx, V>

impl<'gcx, V: Hash> Hash for Canonical<'gcx, V>

fn hash<__HV: Hasher>(&self, __arg_0: &mut __HV)

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<'gcx, V: Decodable> Decodable for Canonical<'gcx, V>

fn decode<__DV: Decoder>(     __arg_0: &mut __DV ) -> Result<Canonical<'gcx, V>, __DV::Error>

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impl<'gcx, V: Encodable> Encodable for Canonical<'gcx, V>

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

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impl<'tcx, C> TypeFoldable<'tcx> for Canonical<'tcx, C> where     C: TypeFoldable<'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_free_regions(&self) -> bool

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"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erasable_regions(&self) -> bool

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True if there any any un-erased free regions.

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<'a, 'tcx, T> Lift<'tcx> for Canonical<'a, T> where     T: Lift<'tcx>,

type Lifted = Canonical<'tcx, T::Lifted>

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fn lift_to_tcx<'b, 'gcx>(     &self,     tcx: TyCtxt<'b, 'gcx, 'tcx> ) -> Option<Canonical<'tcx, T::Lifted>>

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