Struct rustc_middle::infer::canonical::CanonicalVarValues
source · pub struct CanonicalVarValues<'tcx> {
pub var_values: IndexVec<BoundVar, GenericArg<'tcx>>,
}
Expand description
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§
source§impl<'tcx> CanonicalVarValues<'tcx>
impl<'tcx> CanonicalVarValues<'tcx>
pub fn len(&self) -> usize
sourcepub fn make_identity(&self, tcx: TyCtxt<'tcx>) -> Self
pub fn make_identity(&self, tcx: TyCtxt<'tcx>) -> Self
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§
source§impl<'tcx> Clone for CanonicalVarValues<'tcx>
impl<'tcx> Clone for CanonicalVarValues<'tcx>
source§fn clone(&self) -> CanonicalVarValues<'tcx>
fn clone(&self) -> CanonicalVarValues<'tcx>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'tcx> Debug for CanonicalVarValues<'tcx>
impl<'tcx> Debug for CanonicalVarValues<'tcx>
source§impl<'tcx> Hash for CanonicalVarValues<'tcx>
impl<'tcx> Hash for CanonicalVarValues<'tcx>
source§impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for CanonicalVarValues<'tcx>
impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for CanonicalVarValues<'tcx>
fn hash_stable(
&self,
__hcx: &mut StableHashingContext<'__ctx>,
__hasher: &mut StableHasher
)
source§impl<'tcx> Index<BoundVar> for CanonicalVarValues<'tcx>
impl<'tcx> Index<BoundVar> for CanonicalVarValues<'tcx>
§type Output = GenericArg<'tcx>
type Output = GenericArg<'tcx>
source§impl<'a, 'tcx> IntoIterator for &'a CanonicalVarValues<'tcx>
impl<'a, 'tcx> IntoIterator for &'a CanonicalVarValues<'tcx>
source§impl<'tcx, '__lifted> Lift<'__lifted> for CanonicalVarValues<'tcx>
impl<'tcx, '__lifted> Lift<'__lifted> for CanonicalVarValues<'tcx>
type Lifted = CanonicalVarValues<'__lifted>
fn lift_to_tcx(
self,
__tcx: TyCtxt<'__lifted>
) -> Option<CanonicalVarValues<'__lifted>>
source§impl<'tcx> PartialEq<CanonicalVarValues<'tcx>> for CanonicalVarValues<'tcx>
impl<'tcx> PartialEq<CanonicalVarValues<'tcx>> for CanonicalVarValues<'tcx>
source§fn eq(&self, other: &CanonicalVarValues<'tcx>) -> bool
fn eq(&self, other: &CanonicalVarValues<'tcx>) -> bool
source§impl<'tcx> TypeFoldable<'tcx> for CanonicalVarValues<'tcx>
impl<'tcx> TypeFoldable<'tcx> for CanonicalVarValues<'tcx>
source§fn try_fold_with<__F: FallibleTypeFolder<'tcx>>(
self,
__folder: &mut __F
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<'tcx>>(
self,
__folder: &mut __F
) -> Result<Self, __F::Error>
source§impl<'tcx> TypeVisitable<'tcx> for CanonicalVarValues<'tcx>
impl<'tcx> TypeVisitable<'tcx> for CanonicalVarValues<'tcx>
source§fn visit_with<__V: TypeVisitor<'tcx>>(
&self,
__visitor: &mut __V
) -> ControlFlow<__V::BreakTy>
fn visit_with<__V: TypeVisitor<'tcx>>(
&self,
__visitor: &mut __V
) -> ControlFlow<__V::BreakTy>
source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
true
if self
has any late-bound regions that are either
bound by binder
or bound by some binder outside of binder
.
If binder
is ty::INNERMOST
, this indicates whether
there are any late-bound regions that appear free. Read moresource§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
true
if this type has any regions that escape binder
(and
hence are not bound by it). Read moresource§fn has_escaping_bound_vars(&self) -> bool
fn has_escaping_bound_vars(&self) -> bool
true
if this type has regions that are not a part of the type.
For example, for<'a> fn(&'a i32)
return false
, while fn(&'a i32)
would return true
. The latter can occur when traversing through the
former. Read morefn has_type_flags(&self, flags: TypeFlags) -> bool
fn has_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn references_error(&self) -> bool
fn error_reported(&self) -> Result<(), ErrorGuaranteed>
fn has_non_region_param(&self) -> bool
fn has_infer_regions(&self) -> bool
fn has_infer_types(&self) -> bool
fn has_non_region_infer(&self) -> bool
fn needs_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn needs_subst(&self) -> bool
source§fn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
fn has_erased_regions(&self) -> bool
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
source§fn is_global(&self) -> bool
fn is_global(&self) -> bool
source§fn has_late_bound_regions(&self) -> bool
fn has_late_bound_regions(&self) -> bool
source§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization. Read moreimpl<'tcx> Eq for CanonicalVarValues<'tcx>
impl<'tcx> StructuralEq for CanonicalVarValues<'tcx>
impl<'tcx> StructuralPartialEq for CanonicalVarValues<'tcx>
Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for CanonicalVarValues<'tcx>
impl<'tcx> !Send for CanonicalVarValues<'tcx>
impl<'tcx> !Sync for CanonicalVarValues<'tcx>
impl<'tcx> Unpin for CanonicalVarValues<'tcx>
impl<'tcx> !UnwindSafe for CanonicalVarValues<'tcx>
Blanket Implementations§
source§impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
default fn fingerprint_style() -> FingerprintStyle
source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
source§default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
compilation will treat the query as having changed instead of forcing it. Read moresource§impl<T, R> InternIteratorElement<T, R> for T
impl<T, R> InternIteratorElement<T, R> for T
type Output = R
fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error(tcx: Tcx, _: &[QueryInfo]) -> T
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: 24 bytes