Enum CanonicalTyVarKind
pub enum CanonicalTyVarKind {
General(UniverseIndex),
Int,
Float,
}
Expand description
Rust actually has more than one category of type variables; notably, the type variables we create for literals (e.g., 22 or 22.) can only be instantiated with integral/float types (e.g., usize or f32). In order to faithfully reproduce a type, we need to know what set of types a given type variable can be unified with.
Variants§
General(UniverseIndex)
General type variable ?T
that can be unified with arbitrary types.
Int
Integral type variable ?I
(that can only be unified with integral types).
Float
Floating-point type variable ?F
(that can only be unified with float types).
Trait Implementations§
§impl Clone for CanonicalTyVarKind
impl Clone for CanonicalTyVarKind
§fn clone(&self) -> CanonicalTyVarKind
fn clone(&self) -> CanonicalTyVarKind
Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl Debug for CanonicalTyVarKind
impl Debug for CanonicalTyVarKind
§impl<__D> Decodable<__D> for CanonicalTyVarKindwhere
__D: TyDecoder,
impl<__D> Decodable<__D> for CanonicalTyVarKindwhere
__D: TyDecoder,
fn decode(__decoder: &mut __D) -> CanonicalTyVarKind
§impl<__E> Encodable<__E> for CanonicalTyVarKindwhere
__E: TyEncoder,
impl<__E> Encodable<__E> for CanonicalTyVarKindwhere
__E: TyEncoder,
§impl Hash for CanonicalTyVarKind
impl Hash for CanonicalTyVarKind
§impl<__CTX> HashStable<__CTX> for CanonicalTyVarKind
impl<__CTX> HashStable<__CTX> for CanonicalTyVarKind
fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )
§impl PartialEq for CanonicalTyVarKind
impl PartialEq for CanonicalTyVarKind
§impl<I> TypeFoldable<I> for CanonicalTyVarKindwhere
I: Interner,
impl<I> TypeFoldable<I> for CanonicalTyVarKindwhere
I: Interner,
§fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<CanonicalTyVarKind, <__F as FallibleTypeFolder<I>>::Error>where
__F: FallibleTypeFolder<I>,
fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<CanonicalTyVarKind, <__F as FallibleTypeFolder<I>>::Error>where
__F: FallibleTypeFolder<I>,
§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
.§impl<I> TypeVisitable<I> for CanonicalTyVarKindwhere
I: Interner,
impl<I> TypeVisitable<I> for CanonicalTyVarKindwhere
I: Interner,
§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 Copy for CanonicalTyVarKind
impl Eq for CanonicalTyVarKind
impl StructuralPartialEq for CanonicalTyVarKind
Auto Trait Implementations§
impl DynSend for CanonicalTyVarKind
impl DynSync for CanonicalTyVarKind
impl Freeze for CanonicalTyVarKind
impl RefUnwindSafe for CanonicalTyVarKind
impl Send for CanonicalTyVarKind
impl Sync for CanonicalTyVarKind
impl Unpin for CanonicalTyVarKind
impl UnwindSafe for CanonicalTyVarKind
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(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx 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: 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
)§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
§impl<Tcx, T> DepNodeParams<Tcx> for T
impl<Tcx, T> DepNodeParams<Tcx> for T
default fn fingerprint_style() -> FingerprintStyle
§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
§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<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> 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<T> Pointable for T
impl<T> Pointable for T
§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
§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>
§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).§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
§fn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
fn has_erased_regions(&self) -> bool
§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
§fn is_global(&self) -> bool
fn is_global(&self) -> bool
§fn has_bound_regions(&self) -> bool
fn has_bound_regions(&self) -> bool
§fn has_non_region_bound_vars(&self) -> bool
fn has_non_region_bound_vars(&self) -> bool
§fn has_bound_vars(&self) -> bool
fn has_bound_vars(&self) -> bool
§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization.§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>,
§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
§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, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> 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>
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T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for 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: 4 bytes
Size for each variant:
General
: 4 bytesInt
: 0 bytesFloat
: 0 bytes