Struct rustc_infer::infer::canonical::CanonicalVarValues

pub struct CanonicalVarValues<'tcx> {
    pub var_values: IndexVec<BoundVar, GenericArg<'tcx>>,
}

A set of values corresponding to the canonical variables from some Canonical. You can give these values to canonical_value.substitute to substitute 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: IndexVec<BoundVar, GenericArg<'tcx>>

Implementations

impl<'tcx> CanonicalVarValues<'tcx>

pub fn len(&self) -> usize

pub fn make_identity(&self, tcx: TyCtxt<'tcx>) -> CanonicalVarValues<'tcx>

Makes an identity substitution from this one: each bound var is matched to the same bound var, preserving the original kinds. For example, if we have: self.var_values == [Type(u32), Lifetime('a), Type(u64)] we'll return a substitution subst with: subst.var_values == [Type(^0), Lifetime(^1), Type(^2)].

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> Eq for CanonicalVarValues<'tcx>

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, 

Feeds a slice of this type into the given [Hasher].

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 = Cloned<Iter<'a, GenericArg<'tcx>>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <&'a CanonicalVarValues<'tcx> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'tcx> PartialEq<CanonicalVarValues<'tcx>> 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: &CanonicalVarValues<'tcx>) -> bool

This method tests for !=.