Struct rustc_next_trait_solver::solve::eval_ctxt::NestedGoals
source · struct NestedGoals<I: Interner> {
pub normalizes_to_goals: Vec<Goal<I, NormalizesTo<I>>>,
pub goals: Vec<(GoalSource, Goal<I, I::Predicate>)>,
}
Fields§
§normalizes_to_goals: Vec<Goal<I, NormalizesTo<I>>>
These normalizes-to goals are treated specially during the evaluation loop. In each iteration we take the RHS of the projection, replace it with a fresh inference variable, and only after evaluating that goal do we equate the fresh inference variable with the actual RHS of the predicate.
This is both to improve caching, and to avoid using the RHS of the projection predicate to influence the normalizes-to candidate we select.
Forgetting to replace the RHS with a fresh inference variable when we evaluate this goal results in an ICE..
goals: Vec<(GoalSource, Goal<I, I::Predicate>)>
The rest of the goals which have not yet processed or remain ambiguous.
Implementations§
Trait Implementations§
source§impl<I> Clone for NestedGoals<I>where
I: Interner,
impl<I> Clone for NestedGoals<I>where
I: Interner,
source§impl<I> Debug for NestedGoals<I>where
I: Interner,
impl<I> Debug for NestedGoals<I>where
I: Interner,
source§impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: Decodable<__D>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Decodable<__D>,
impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: Decodable<__D>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Decodable<__D>,
source§impl<I> Default for NestedGoals<I>where
I: Interner,
impl<I> Default for NestedGoals<I>where
I: Interner,
source§impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: Encodable<__E>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Encodable<__E>,
impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: Encodable<__E>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Encodable<__E>,
source§impl<I: Interner, __CTX> HashStable<__CTX> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: HashStable<__CTX>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: HashStable<__CTX>,
impl<I: Interner, __CTX> HashStable<__CTX> for NestedGoals<I>where
Vec<Goal<I, NormalizesTo<I>>>: HashStable<__CTX>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: HashStable<__CTX>,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl<I, J> Lift<J> for NestedGoals<I>where
I: Interner,
J: Interner,
Vec<Goal<I, NormalizesTo<I>>>: Lift<J, Lifted = Vec<Goal<J, NormalizesTo<J>>>>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Lift<J, Lifted = Vec<(GoalSource, Goal<J, J::Predicate>)>>,
impl<I, J> Lift<J> for NestedGoals<I>where
I: Interner,
J: Interner,
Vec<Goal<I, NormalizesTo<I>>>: Lift<J, Lifted = Vec<Goal<J, NormalizesTo<J>>>>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: Lift<J, Lifted = Vec<(GoalSource, Goal<J, J::Predicate>)>>,
type Lifted = NestedGoals<J>
fn lift_to_interner(self, interner: J) -> Option<Self::Lifted>
source§impl<I> TypeFoldable<I> for NestedGoals<I>where
I: Interner,
Vec<Goal<I, NormalizesTo<I>>>: TypeFoldable<I>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: TypeFoldable<I>,
impl<I> TypeFoldable<I> for NestedGoals<I>where
I: Interner,
Vec<Goal<I, NormalizesTo<I>>>: TypeFoldable<I>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: 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>(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 NestedGoals<I>where
I: Interner,
Vec<Goal<I, NormalizesTo<I>>>: TypeVisitable<I>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: TypeVisitable<I>,
impl<I> TypeVisitable<I> for NestedGoals<I>where
I: Interner,
Vec<Goal<I, NormalizesTo<I>>>: TypeVisitable<I>,
Vec<(GoalSource, Goal<I, I::Predicate>)>: 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
Auto Trait Implementations§
impl<I> Freeze for NestedGoals<I>
impl<I> RefUnwindSafe for NestedGoals<I>where
<I as Interner>::ParamEnv: RefUnwindSafe,
<I as Interner>::Term: RefUnwindSafe,
<I as Interner>::Predicate: RefUnwindSafe,
<I as Interner>::GenericArgs: RefUnwindSafe,
<I as Interner>::DefId: RefUnwindSafe,
impl<I> Send for NestedGoals<I>
impl<I> Sync for NestedGoals<I>
impl<I> Unpin for NestedGoals<I>
impl<I> UnwindSafe for NestedGoals<I>where
<I as Interner>::ParamEnv: UnwindSafe,
<I as Interner>::Term: UnwindSafe,
<I as Interner>::Predicate: UnwindSafe,
<I as Interner>::GenericArgs: UnwindSafe,
<I as Interner>::DefId: UnwindSafe,
Blanket Implementations§
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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
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
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impl<T> Instrument for T
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Size: 48 bytes