Enum rustc_type_ir::canonical::CanonicalVarKind
source · pub enum CanonicalVarKind<I: Interner> {
Ty(CanonicalTyVarKind),
PlaceholderTy(I::PlaceholderTy),
Region(UniverseIndex),
PlaceholderRegion(I::PlaceholderRegion),
Const(UniverseIndex),
Effect,
PlaceholderConst(I::PlaceholderConst),
}
Expand description
Describes the “kind” of the canonical variable. This is a “kind” in the type-theory sense of the term – i.e., a “meta” type system that analyzes type-like values.
Variants§
Ty(CanonicalTyVarKind)
Some kind of type inference variable.
PlaceholderTy(I::PlaceholderTy)
A “placeholder” that represents “any type”.
Region(UniverseIndex)
Region variable '?R
.
PlaceholderRegion(I::PlaceholderRegion)
A “placeholder” that represents “any region”. Created when you
are solving a goal like for<'a> T: Foo<'a>
to represent the
bound region 'a
.
Const(UniverseIndex)
Some kind of const inference variable.
Effect
Effect variable '?E
.
PlaceholderConst(I::PlaceholderConst)
A “placeholder” that represents “any const”.
Implementations§
source§impl<I: Interner> CanonicalVarKind<I>
impl<I: Interner> CanonicalVarKind<I>
pub fn universe(self) -> UniverseIndex
sourcepub fn with_updated_universe(self, ui: UniverseIndex) -> CanonicalVarKind<I>
pub fn with_updated_universe(self, ui: UniverseIndex) -> CanonicalVarKind<I>
Replaces the universe of this canonical variable with ui
.
In case this is a float or int variable, this causes an ICE if the updated universe is not the root.
Trait Implementations§
source§impl<I> Clone for CanonicalVarKind<I>where
I: Interner,
impl<I> Clone for CanonicalVarKind<I>where
I: Interner,
source§impl<I> Debug for CanonicalVarKind<I>where
I: Interner,
impl<I> Debug for CanonicalVarKind<I>where
I: Interner,
source§impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for CanonicalVarKind<I>where
I::PlaceholderTy: Decodable<__D>,
I::PlaceholderRegion: Decodable<__D>,
I::PlaceholderConst: Decodable<__D>,
impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for CanonicalVarKind<I>where
I::PlaceholderTy: Decodable<__D>,
I::PlaceholderRegion: Decodable<__D>,
I::PlaceholderConst: Decodable<__D>,
source§impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for CanonicalVarKind<I>where
I::PlaceholderTy: Encodable<__E>,
I::PlaceholderRegion: Encodable<__E>,
I::PlaceholderConst: Encodable<__E>,
impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for CanonicalVarKind<I>where
I::PlaceholderTy: Encodable<__E>,
I::PlaceholderRegion: Encodable<__E>,
I::PlaceholderConst: Encodable<__E>,
source§impl<I> Hash for CanonicalVarKind<I>where
I: Interner,
impl<I> Hash for CanonicalVarKind<I>where
I: Interner,
source§impl<I: Interner, __CTX> HashStable<__CTX> for CanonicalVarKind<I>where
I::PlaceholderTy: HashStable<__CTX>,
I::PlaceholderRegion: HashStable<__CTX>,
I::PlaceholderConst: HashStable<__CTX>,
impl<I: Interner, __CTX> HashStable<__CTX> for CanonicalVarKind<I>where
I::PlaceholderTy: HashStable<__CTX>,
I::PlaceholderRegion: HashStable<__CTX>,
I::PlaceholderConst: HashStable<__CTX>,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl<I> PartialEq for CanonicalVarKind<I>where
I: Interner,
impl<I> PartialEq for CanonicalVarKind<I>where
I: Interner,
source§impl<I> TypeFoldable<I> for CanonicalVarKind<I>where
I: Interner,
I::PlaceholderTy: TypeFoldable<I>,
I::PlaceholderRegion: TypeFoldable<I>,
I::PlaceholderConst: TypeFoldable<I>,
impl<I> TypeFoldable<I> for CanonicalVarKind<I>where
I: Interner,
I::PlaceholderTy: TypeFoldable<I>,
I::PlaceholderRegion: TypeFoldable<I>,
I::PlaceholderConst: TypeFoldable<I>,
source§fn try_fold_with<__F: FallibleTypeFolder<I>>(
self,
__folder: &mut __F,
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<I>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>
source§fn fold_with<F: TypeFolder<I>>(self, folder: &mut F) -> Self
fn fold_with<F: TypeFolder<I>>(self, folder: &mut F) -> Self
try_fold_with
for use with infallible
folders. Do not override this method, to ensure coherence with
try_fold_with
.source§impl<I> TypeVisitable<I> for CanonicalVarKind<I>where
I: Interner,
I::PlaceholderTy: TypeVisitable<I>,
I::PlaceholderRegion: TypeVisitable<I>,
I::PlaceholderConst: TypeVisitable<I>,
impl<I> TypeVisitable<I> for CanonicalVarKind<I>where
I: Interner,
I::PlaceholderTy: TypeVisitable<I>,
I::PlaceholderRegion: TypeVisitable<I>,
I::PlaceholderConst: TypeVisitable<I>,
source§fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result
fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result
impl<I> Copy for CanonicalVarKind<I>where
I: Interner,
impl<I> Eq for CanonicalVarKind<I>where
I: Interner,
Auto Trait Implementations§
impl<I> Freeze for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: Freeze,
<I as Interner>::PlaceholderRegion: Freeze,
<I as Interner>::PlaceholderConst: Freeze,
impl<I> RefUnwindSafe for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: RefUnwindSafe,
<I as Interner>::PlaceholderRegion: RefUnwindSafe,
<I as Interner>::PlaceholderConst: RefUnwindSafe,
impl<I> Send for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: Send,
<I as Interner>::PlaceholderRegion: Send,
<I as Interner>::PlaceholderConst: Send,
impl<I> Sync for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: Sync,
<I as Interner>::PlaceholderRegion: Sync,
<I as Interner>::PlaceholderConst: Sync,
impl<I> Unpin for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: Unpin,
<I as Interner>::PlaceholderRegion: Unpin,
<I as Interner>::PlaceholderConst: Unpin,
impl<I> UnwindSafe for CanonicalVarKind<I>where
<I as Interner>::PlaceholderTy: UnwindSafe,
<I as Interner>::PlaceholderRegion: UnwindSafe,
<I as Interner>::PlaceholderConst: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
T: TypeVisitable<I>,
impl<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
T: TypeVisitable<I>,
fn has_type_flags(&self, flags: TypeFlags) -> bool
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.fn error_reported(&self) -> Result<(), <I as Interner>::ErrorGuaranteed>
source§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).source§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_aliases(&self) -> bool
fn has_opaque_types(&self) -> bool
fn has_coroutines(&self) -> bool
fn references_error(&self) -> bool
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 has_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn has_non_region_placeholders(&self) -> bool
fn has_param(&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_bound_regions(&self) -> bool
fn has_bound_regions(&self) -> bool
source§fn has_non_region_bound_vars(&self) -> bool
fn has_non_region_bound_vars(&self) -> bool
source§fn has_bound_vars(&self) -> bool
fn has_bound_vars(&self) -> bool
source§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization.source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
Layout§
Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.