pub enum CanonicalVarKind<I>where
I: Interner,{
Ty(CanonicalTyVarKind),
PlaceholderTy(<I as Interner>::PlaceholderTy),
Region(UniverseIndex),
PlaceholderRegion(<I as Interner>::PlaceholderRegion),
Const(UniverseIndex),
Effect,
PlaceholderConst(<I as Interner>::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 as Interner>::PlaceholderTy)
A “placeholder” that represents “any type”.
Region(UniverseIndex)
Region variable '?R
.
PlaceholderRegion(<I as Interner>::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 as Interner>::PlaceholderConst)
A “placeholder” that represents “any const”.
Implementations§
source§impl<I> CanonicalVarKind<I>where
I: Interner,
impl<I> CanonicalVarKind<I>where
I: Interner,
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§fn clone(&self) -> CanonicalVarKind<I>
fn clone(&self) -> CanonicalVarKind<I>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<I> Debug for CanonicalVarKind<I>where
I: Interner,
impl<I> Debug for CanonicalVarKind<I>where
I: Interner,
source§impl<I, __D> Decodable<__D> for CanonicalVarKind<I>where
I: Interner,
__D: TyDecoder<I = I>,
<I as Interner>::PlaceholderTy: Decodable<__D>,
<I as Interner>::PlaceholderRegion: Decodable<__D>,
<I as Interner>::PlaceholderConst: Decodable<__D>,
impl<I, __D> Decodable<__D> for CanonicalVarKind<I>where
I: Interner,
__D: TyDecoder<I = I>,
<I as Interner>::PlaceholderTy: Decodable<__D>,
<I as Interner>::PlaceholderRegion: Decodable<__D>,
<I as Interner>::PlaceholderConst: Decodable<__D>,
fn decode(__decoder: &mut __D) -> CanonicalVarKind<I>
source§impl<I, __E> Encodable<__E> for CanonicalVarKind<I>where
I: Interner,
__E: TyEncoder<I = I>,
<I as Interner>::PlaceholderTy: Encodable<__E>,
<I as Interner>::PlaceholderRegion: Encodable<__E>,
<I as Interner>::PlaceholderConst: Encodable<__E>,
impl<I, __E> Encodable<__E> for CanonicalVarKind<I>where
I: Interner,
__E: TyEncoder<I = I>,
<I as Interner>::PlaceholderTy: Encodable<__E>,
<I as Interner>::PlaceholderRegion: Encodable<__E>,
<I as Interner>::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, __CTX> HashStable<__CTX> for CanonicalVarKind<I>where
I: Interner,
<I as Interner>::PlaceholderTy: HashStable<__CTX>,
<I as Interner>::PlaceholderRegion: HashStable<__CTX>,
<I as Interner>::PlaceholderConst: HashStable<__CTX>,
impl<I, __CTX> HashStable<__CTX> for CanonicalVarKind<I>where
I: Interner,
<I as Interner>::PlaceholderTy: HashStable<__CTX>,
<I as Interner>::PlaceholderRegion: HashStable<__CTX>,
<I as Interner>::PlaceholderConst: HashStable<__CTX>,
fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )
source§impl<I> PartialEq for CanonicalVarKind<I>where
I: Interner,
impl<I> PartialEq for CanonicalVarKind<I>where
I: Interner,
source§fn eq(&self, other: &CanonicalVarKind<I>) -> bool
fn eq(&self, other: &CanonicalVarKind<I>) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl<I> TypeFoldable<I> for CanonicalVarKind<I>where
I: Interner,
<I as Interner>::PlaceholderTy: TypeFoldable<I>,
<I as Interner>::PlaceholderRegion: TypeFoldable<I>,
<I as Interner>::PlaceholderConst: TypeFoldable<I>,
impl<I> TypeFoldable<I> for CanonicalVarKind<I>where
I: Interner,
<I as Interner>::PlaceholderTy: TypeFoldable<I>,
<I as Interner>::PlaceholderRegion: TypeFoldable<I>,
<I as Interner>::PlaceholderConst: TypeFoldable<I>,
source§fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<CanonicalVarKind<I>, <__F as FallibleTypeFolder<I>>::Error>where
__F: FallibleTypeFolder<I>,
fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<CanonicalVarKind<I>, <__F as FallibleTypeFolder<I>>::Error>where
__F: FallibleTypeFolder<I>,
source§fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
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 as Interner>::PlaceholderTy: TypeVisitable<I>,
<I as Interner>::PlaceholderRegion: TypeVisitable<I>,
<I as Interner>::PlaceholderConst: TypeVisitable<I>,
impl<I> TypeVisitable<I> for CanonicalVarKind<I>where
I: Interner,
<I as Interner>::PlaceholderTy: TypeVisitable<I>,
<I as Interner>::PlaceholderRegion: TypeVisitable<I>,
<I as Interner>::PlaceholderConst: TypeVisitable<I>,
source§fn visit_with<__V>(
&self,
__visitor: &mut __V,
) -> <__V as TypeVisitor<I>>::Resultwhere
__V: TypeVisitor<I>,
fn visit_with<__V>(
&self,
__visitor: &mut __V,
) -> <__V as TypeVisitor<I>>::Resultwhere
__V: TypeVisitor<I>,
impl<I> Copy 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<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]
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: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
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> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default 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<Tcx, T> DepNodeParams<Tcx> for T
impl<Tcx, T> DepNodeParams<Tcx> for T
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) -> Option<T>
default fn recover(_: Tcx, _: &DepNode) -> 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.source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
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<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<'tcx, T> IsSuggestable<'tcx> for T
impl<'tcx, T> IsSuggestable<'tcx> for T
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§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_inherent_projections(&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
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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>,
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source§impl<Tcx, T> Value<Tcx> for Twhere
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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.