Enum rustc_trait_selection::infer::canonical::ir::PredicateKind
source · pub enum PredicateKind<I>where
I: Interner,{
Clause(ClauseKind<I>),
ObjectSafe(<I as Interner>::DefId),
Subtype(SubtypePredicate<I>),
Coerce(CoercePredicate<I>),
ConstEquate(<I as Interner>::Const, <I as Interner>::Const),
Ambiguous,
NormalizesTo(NormalizesTo<I>),
AliasRelate(<I as Interner>::Term, <I as Interner>::Term, AliasRelationDirection),
}
Variants§
Clause(ClauseKind<I>)
Prove a clause
ObjectSafe(<I as Interner>::DefId)
Trait must be object-safe.
Subtype(SubtypePredicate<I>)
T1 <: T2
This obligation is created most often when we have two unresolved type variables and hence don’t have enough information to process the subtyping obligation yet.
Coerce(CoercePredicate<I>)
T1
coerced to T2
Like a subtyping obligation, this is created most often when we have two unresolved type variables and hence don’t have enough information to process the coercion obligation yet. At the moment, we actually process coercions very much like subtyping and don’t handle the full coercion logic.
ConstEquate(<I as Interner>::Const, <I as Interner>::Const)
Constants must be equal. The first component is the const that is expected.
Ambiguous
A marker predicate that is always ambiguous. Used for coherence to mark opaque types as possibly equal to each other but ambiguous.
NormalizesTo(NormalizesTo<I>)
This should only be used inside of the new solver for AliasRelate
and expects
the term
to be an unconstrained inference variable.
The alias normalizes to term
. Unlike Projection
, this always fails if the
alias cannot be normalized in the current context. For the rigid alias
T as Trait>::Assoc
, Projection(<T as Trait>::Assoc, ?x)
constrains ?x
to <T as Trait>::Assoc
while NormalizesTo(<T as Trait>::Assoc, ?x)
results in NoSolution
.
AliasRelate(<I as Interner>::Term, <I as Interner>::Term, AliasRelationDirection)
Separate from ClauseKind::Projection
which is used for normalization in new solver.
This predicate requires two terms to be equal to eachother.
Only used for new solver.
Trait Implementations§
source§impl<I> Clone for PredicateKind<I>where
I: Interner,
impl<I> Clone for PredicateKind<I>where
I: Interner,
source§fn clone(&self) -> PredicateKind<I>
fn clone(&self) -> PredicateKind<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 PredicateKind<I>where
I: Interner,
impl<I> Debug for PredicateKind<I>where
I: Interner,
source§impl<I, __D> Decodable<__D> for PredicateKind<I>where
I: Interner,
__D: TyDecoder<I = I>,
ClauseKind<I>: Decodable<__D>,
<I as Interner>::DefId: Decodable<__D>,
SubtypePredicate<I>: Decodable<__D>,
CoercePredicate<I>: Decodable<__D>,
<I as Interner>::Const: Decodable<__D>,
NormalizesTo<I>: Decodable<__D>,
<I as Interner>::Term: Decodable<__D>,
impl<I, __D> Decodable<__D> for PredicateKind<I>where
I: Interner,
__D: TyDecoder<I = I>,
ClauseKind<I>: Decodable<__D>,
<I as Interner>::DefId: Decodable<__D>,
SubtypePredicate<I>: Decodable<__D>,
CoercePredicate<I>: Decodable<__D>,
<I as Interner>::Const: Decodable<__D>,
NormalizesTo<I>: Decodable<__D>,
<I as Interner>::Term: Decodable<__D>,
fn decode(__decoder: &mut __D) -> PredicateKind<I>
source§impl<I, __E> Encodable<__E> for PredicateKind<I>where
I: Interner,
__E: TyEncoder<I = I>,
ClauseKind<I>: Encodable<__E>,
<I as Interner>::DefId: Encodable<__E>,
SubtypePredicate<I>: Encodable<__E>,
CoercePredicate<I>: Encodable<__E>,
<I as Interner>::Const: Encodable<__E>,
NormalizesTo<I>: Encodable<__E>,
<I as Interner>::Term: Encodable<__E>,
impl<I, __E> Encodable<__E> for PredicateKind<I>where
I: Interner,
__E: TyEncoder<I = I>,
ClauseKind<I>: Encodable<__E>,
<I as Interner>::DefId: Encodable<__E>,
SubtypePredicate<I>: Encodable<__E>,
CoercePredicate<I>: Encodable<__E>,
<I as Interner>::Const: Encodable<__E>,
NormalizesTo<I>: Encodable<__E>,
<I as Interner>::Term: Encodable<__E>,
source§impl<'tcx, E> EncodableWithShorthand<E> for PredicateKind<TyCtxt<'tcx>>
impl<'tcx, E> EncodableWithShorthand<E> for PredicateKind<TyCtxt<'tcx>>
type Variant = PredicateKind<TyCtxt<'tcx>>
fn variant(&self) -> &PredicateKind<TyCtxt<'tcx>>
source§impl<I> Hash for PredicateKind<I>where
I: Interner,
impl<I> Hash for PredicateKind<I>where
I: Interner,
source§impl<I, __CTX> HashStable<__CTX> for PredicateKind<I>where
I: Interner,
ClauseKind<I>: HashStable<__CTX>,
<I as Interner>::DefId: HashStable<__CTX>,
SubtypePredicate<I>: HashStable<__CTX>,
CoercePredicate<I>: HashStable<__CTX>,
<I as Interner>::Const: HashStable<__CTX>,
NormalizesTo<I>: HashStable<__CTX>,
<I as Interner>::Term: HashStable<__CTX>,
impl<I, __CTX> HashStable<__CTX> for PredicateKind<I>where
I: Interner,
ClauseKind<I>: HashStable<__CTX>,
<I as Interner>::DefId: HashStable<__CTX>,
SubtypePredicate<I>: HashStable<__CTX>,
CoercePredicate<I>: HashStable<__CTX>,
<I as Interner>::Const: HashStable<__CTX>,
NormalizesTo<I>: HashStable<__CTX>,
<I as Interner>::Term: HashStable<__CTX>,
fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )
source§impl<I> PartialEq for PredicateKind<I>where
I: Interner,
impl<I> PartialEq for PredicateKind<I>where
I: Interner,
source§fn eq(&self, other: &PredicateKind<I>) -> bool
fn eq(&self, other: &PredicateKind<I>) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl<'tcx, P> Print<'tcx, P> for PredicateKind<TyCtxt<'tcx>>where
P: PrettyPrinter<'tcx>,
impl<'tcx, P> Print<'tcx, P> for PredicateKind<TyCtxt<'tcx>>where
P: PrettyPrinter<'tcx>,
source§impl<I> TypeFoldable<I> for PredicateKind<I>where
I: Interner,
ClauseKind<I>: TypeFoldable<I>,
<I as Interner>::DefId: TypeFoldable<I>,
SubtypePredicate<I>: TypeFoldable<I>,
CoercePredicate<I>: TypeFoldable<I>,
<I as Interner>::Const: TypeFoldable<I>,
NormalizesTo<I>: TypeFoldable<I>,
<I as Interner>::Term: TypeFoldable<I>,
impl<I> TypeFoldable<I> for PredicateKind<I>where
I: Interner,
ClauseKind<I>: TypeFoldable<I>,
<I as Interner>::DefId: TypeFoldable<I>,
SubtypePredicate<I>: TypeFoldable<I>,
CoercePredicate<I>: TypeFoldable<I>,
<I as Interner>::Const: TypeFoldable<I>,
NormalizesTo<I>: TypeFoldable<I>,
<I as Interner>::Term: TypeFoldable<I>,
source§fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<PredicateKind<I>, <__F as FallibleTypeFolder<I>>::Error>where
__F: FallibleTypeFolder<I>,
fn try_fold_with<__F>(
self,
__folder: &mut __F,
) -> Result<PredicateKind<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 PredicateKind<I>where
I: Interner,
ClauseKind<I>: TypeVisitable<I>,
<I as Interner>::DefId: TypeVisitable<I>,
SubtypePredicate<I>: TypeVisitable<I>,
CoercePredicate<I>: TypeVisitable<I>,
<I as Interner>::Const: TypeVisitable<I>,
NormalizesTo<I>: TypeVisitable<I>,
<I as Interner>::Term: TypeVisitable<I>,
impl<I> TypeVisitable<I> for PredicateKind<I>where
I: Interner,
ClauseKind<I>: TypeVisitable<I>,
<I as Interner>::DefId: TypeVisitable<I>,
SubtypePredicate<I>: TypeVisitable<I>,
CoercePredicate<I>: TypeVisitable<I>,
<I as Interner>::Const: TypeVisitable<I>,
NormalizesTo<I>: TypeVisitable<I>,
<I as Interner>::Term: 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>,
source§impl<'tcx> UpcastFrom<TyCtxt<'tcx>, PredicateKind<TyCtxt<'tcx>>> for Predicate<'tcx>
impl<'tcx> UpcastFrom<TyCtxt<'tcx>, PredicateKind<TyCtxt<'tcx>>> for Predicate<'tcx>
fn upcast_from( from: PredicateKind<TyCtxt<'tcx>>, tcx: TyCtxt<'tcx>, ) -> Predicate<'tcx>
impl<I> Copy for PredicateKind<I>where
I: Interner,
impl<I> Eq for PredicateKind<I>where
I: Interner,
Auto Trait Implementations§
impl<I> Freeze for PredicateKind<I>
impl<I> RefUnwindSafe for PredicateKind<I>where
<I as Interner>::DefId: RefUnwindSafe,
<I as Interner>::Const: RefUnwindSafe,
<I as Interner>::Term: RefUnwindSafe,
<I as Interner>::Ty: RefUnwindSafe,
<I as Interner>::GenericArg: RefUnwindSafe,
<I as Interner>::Region: RefUnwindSafe,
<I as Interner>::GenericArgs: RefUnwindSafe,
impl<I> Send for PredicateKind<I>
impl<I> Sync for PredicateKind<I>
impl<I> Unpin for PredicateKind<I>
impl<I> UnwindSafe for PredicateKind<I>where
<I as Interner>::DefId: UnwindSafe,
<I as Interner>::Const: UnwindSafe,
<I as Interner>::Term: UnwindSafe,
<I as Interner>::Ty: UnwindSafe,
<I as Interner>::GenericArg: UnwindSafe,
<I as Interner>::Region: UnwindSafe,
<I as Interner>::GenericArgs: UnwindSafe,
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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
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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
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fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
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unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
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