Struct rustc_trait_selection::infer::canonical::CanonicalVarValues

pub struct CanonicalVarValues<'tcx> {
    pub var_values: &'tcx List<GenericArg<'tcx>>,
}

A set of values corresponding to the canonical variables from some Canonical. You can give these values to canonical_value.instantiate to instantiate them into the canonical value at the right places.

When you canonicalize a value V, you get back one of these vectors with the original values that were replaced by canonical variables. You will need to supply it later to instantiate the canonicalized query response.

Fields

var_values: &'tcx List<GenericArg<'tcx>>

Implementations

impl CanonicalVarValues<'_>

pub fn is_identity(&self) -> bool

pub fn is_identity_modulo_regions(&self) -> bool

impl<'tcx> CanonicalVarValues<'tcx>

pub fn make_identity( tcx: TyCtxt<'tcx>, infos: &'tcx List<CanonicalVarInfo<TyCtxt<'tcx>>> ) -> CanonicalVarValues<'tcx>

pub fn dummy() -> CanonicalVarValues<'tcx>

Creates dummy var values which should not be used in a canonical response.

pub fn len(&self) -> usize

Trait Implementations

impl<'tcx> Clone for CanonicalVarValues<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for CanonicalVarValues<'tcx>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'tcx, __D> Decodable<__D> for CanonicalVarValues<'tcx>

where __D: TyDecoder<I = TyCtxt<'tcx>>,

fn decode(__decoder: &mut __D) -> CanonicalVarValues<'tcx>

impl<'tcx, __E> Encodable<__E> for CanonicalVarValues<'tcx>

where __E: TyEncoder<I = TyCtxt<'tcx>>,

fn encode(&self, __encoder: &mut __E)

impl<'tcx> Hash for CanonicalVarValues<'tcx>

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for CanonicalVarValues<'tcx>

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

impl<'tcx> Index<BoundVar> for CanonicalVarValues<'tcx>

type Output = GenericArg<'tcx>

The returned type after indexing.

fn index(&self, value: BoundVar) -> &GenericArg<'tcx>

Performs the indexing (container[index]) operation.

impl<'a, 'tcx> IntoIterator for &'a CanonicalVarValues<'tcx>

type Item = GenericArg<'tcx>

The type of the elements being iterated over.

type IntoIter = Copied<Iter<'a, GenericArg<'tcx>>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Copied<Iter<'a, GenericArg<'tcx>>>

Creates an iterator from a value.

impl<'tcx> PartialEq for CanonicalVarValues<'tcx>

fn eq(&self, other: &CanonicalVarValues<'tcx>) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CanonicalVarValues<'tcx>

fn try_fold_with<__F>( self, __folder: &mut __F ) -> Result<CanonicalVarValues<'tcx>, <__F as FallibleTypeFolder<TyCtxt<'tcx>>>::Error>

where __F: FallibleTypeFolder<TyCtxt<'tcx>>,

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Self

where F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for CanonicalVarValues<'tcx>

fn visit_with<__V>( &self, __visitor: &mut __V ) -> <__V as TypeVisitor<TyCtxt<'tcx>>>::Result

where __V: TypeVisitor<TyCtxt<'tcx>>,

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl<'tcx> Copy for CanonicalVarValues<'tcx>

impl<'tcx> Eq for CanonicalVarValues<'tcx>

impl<'tcx> StructuralPartialEq for CanonicalVarValues<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes