Struct rustc::infer::canonical::QueryResult

pub struct QueryResult<'tcx, R> {
    pub var_values: CanonicalVarValues<'tcx>,
    pub region_constraints: QueryRegionConstraints<'tcx>,
    pub certainty: Certainty,
    pub value: R,
}

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After we execute a query with a canonicalized key, we get back a Canonical<QueryResult<..>>. You can use instantiate_query_result to access the data in this result.

Fields

var_values: CanonicalVarValues<'tcx>

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region_constraints: QueryRegionConstraints<'tcx>

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certainty: Certainty

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value: R

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Methods

impl<'tcx, R> 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, R> HashStable<StableHashingContext<'a>> for QueryResult<'tcx, R> where     R: HashStable<StableHashingContext<'a>>,

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

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impl<'tcx, R: Clone> Clone for QueryResult<'tcx, R>

fn clone(&self) -> QueryResult<'tcx, R>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx, R: Debug> Debug for QueryResult<'tcx, R>

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

Formats the value using the given formatter.

impl<'tcx, R> TypeFoldable<'tcx> for QueryResult<'tcx, R> where     R: 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, R> Lift<'tcx> for QueryResult<'a, R> where     R: Lift<'tcx>,

type Lifted = QueryResult<'tcx, R::Lifted>

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

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impl<'gcx: 'tcx, 'tcx> Canonicalize<'gcx, 'tcx> for QueryResult<'tcx, DropckOutlivesResult<'tcx>>

type Canonicalized = Lrc<Canonical<'gcx, QueryResult<'gcx, DropckOutlivesResult<'gcx>>>>

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fn intern(     _gcx: TyCtxt<'_, 'gcx, 'gcx>,     value: Canonical<'gcx, Self::Lifted> ) -> Self::Canonicalized

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After a value has been fully canonicalized and lifted, this method will allocate it in a global arena.

impl<'gcx: 'tcx, 'tcx> Canonicalize<'gcx, 'tcx> for QueryResult<'tcx, NormalizationResult<'tcx>>

type Canonicalized = Lrc<Canonical<'gcx, QueryResult<'gcx, NormalizationResult<'gcx>>>>

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fn intern(     _gcx: TyCtxt<'_, 'gcx, 'gcx>,     value: Canonical<'gcx, Self::Lifted> ) -> Self::Canonicalized

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After a value has been fully canonicalized and lifted, this method will allocate it in a global arena.