rustc_next_trait_solver::solve::eval_ctxt

Struct ReplaceAliasWithInfer

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struct ReplaceAliasWithInfer<'me, 'a, D, I>
where
    D: SolverDelegate<Interner = I>,
    I: Interner,
{
    ecx: &'me mut EvalCtxt<'a, D>,
    param_env: I::ParamEnv,
    cache: HashMap<I::Ty, I::Ty>,
}
Expand description

Eagerly replace aliases with inference variables, emitting AliasRelate goals, used when adding goals to the EvalCtxt. We compute the AliasRelate goals before evaluating the actual goal to get all the constraints we can.

This is a performance optimization to more eagerly detect cycles during trait solving. See tests/ui/traits/next-solver/cycles/cycle-modulo-ambig-aliases.rs.

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§ecx: &'me mut EvalCtxt<'a, D>§param_env: I::ParamEnv§cache: HashMap<I::Ty, I::Ty>

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impl<'me, 'a, D, I> ReplaceAliasWithInfer<'me, 'a, D, I>
where D: SolverDelegate<Interner = I>, I: Interner,

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fn new(ecx: &'me mut EvalCtxt<'a, D>, param_env: I::ParamEnv) -> Self

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impl<D, I> TypeFolder<I> for ReplaceAliasWithInfer<'_, '_, D, I>
where D: SolverDelegate<Interner = I>, I: Interner,

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fn cx(&self) -> I

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fn fold_ty(&mut self, ty: I::Ty) -> I::Ty

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fn fold_const(&mut self, ct: I::Const) -> I::Const

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fn fold_predicate(&mut self, predicate: I::Predicate) -> I::Predicate

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fn fold_binder<T>(&mut self, t: Binder<I, T>) -> Binder<I, T>
where T: TypeFoldable<I>,

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fn fold_region(&mut self, r: <I as Interner>::Region) -> <I as Interner>::Region

Auto Trait Implementations§

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impl<'me, 'a, D, I> DynSend for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: DynSend, <I as Interner>::Ty: DynSend, <I as Interner>::CanonicalVars: DynSend, <I as Interner>::PredefinedOpaques: DynSend, D: DynSync + DynSend, <I as Interner>::GenericArgs: DynSend, <I as Interner>::DefiningOpaqueTypes: DynSend, <I as Interner>::Term: DynSend, <I as Interner>::Predicate: DynSend, <I as Interner>::DefId: DynSend, <I as Interner>::GenericArg: DynSend, <I as Interner>::ExternalConstraints: DynSend,

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impl<'me, 'a, D, I> DynSync for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: DynSync, <I as Interner>::Ty: DynSync, <I as Interner>::CanonicalVars: DynSync, <I as Interner>::PredefinedOpaques: DynSync, D: DynSync, <I as Interner>::GenericArgs: DynSync, <I as Interner>::DefiningOpaqueTypes: DynSync, <I as Interner>::Term: DynSync, <I as Interner>::Predicate: DynSync, <I as Interner>::DefId: DynSync, <I as Interner>::GenericArg: DynSync, <I as Interner>::ExternalConstraints: DynSync,

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impl<'me, 'a, D, I> Freeze for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: Freeze,

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impl<'me, 'a, D, I> RefUnwindSafe for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: RefUnwindSafe, <I as Interner>::CanonicalVars: RefUnwindSafe, <I as Interner>::PredefinedOpaques: RefUnwindSafe, D: RefUnwindSafe, <I as Interner>::GenericArgs: RefUnwindSafe, <I as Interner>::Ty: RefUnwindSafe, <I as Interner>::Term: RefUnwindSafe, <I as Interner>::Predicate: RefUnwindSafe, <I as Interner>::DefId: RefUnwindSafe, <I as Interner>::DefiningOpaqueTypes: RefUnwindSafe, <I as Interner>::GenericArg: RefUnwindSafe, <I as Interner>::ExternalConstraints: RefUnwindSafe,

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impl<'me, 'a, D, I> Send for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: Send, <I as Interner>::CanonicalVars: Send, <I as Interner>::PredefinedOpaques: Send, D: Sync + Send, <I as Interner>::GenericArgs: Send, <I as Interner>::Ty: Send, <I as Interner>::DefiningOpaqueTypes: Send, <I as Interner>::Term: Send, <I as Interner>::Predicate: Send, <I as Interner>::DefId: Send, <I as Interner>::ExternalConstraints: Send, <I as Interner>::GenericArg: Send,

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impl<'me, 'a, D, I> Sync for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: Sync, <I as Interner>::CanonicalVars: Sync, <I as Interner>::PredefinedOpaques: Sync, D: Sync, <I as Interner>::GenericArgs: Sync, <I as Interner>::Ty: Sync, <I as Interner>::Term: Sync, <I as Interner>::Predicate: Sync, <I as Interner>::DefiningOpaqueTypes: Sync, <I as Interner>::DefId: Sync, <I as Interner>::GenericArg: Sync, <I as Interner>::ExternalConstraints: Sync,

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impl<'me, 'a, D, I> Unpin for ReplaceAliasWithInfer<'me, 'a, D, I>
where <D as Deref>::Target: Sized, <I as Interner>::ParamEnv: Unpin, <I as Interner>::Ty: Unpin,

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impl<'me, 'a, D, I> !UnwindSafe for ReplaceAliasWithInfer<'me, 'a, D, I>

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const ALIGN: Alignment = _

Alignment of Self.
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where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<I, F> FallibleTypeFolder<I> for F
where I: Interner, F: TypeFolder<I>,

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type Error = !

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fn cx(&self) -> I

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fn try_fold_binder<T>(&mut self, t: Binder<I, T>) -> Result<Binder<I, T>, !>
where T: TypeFoldable<I>,

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fn try_fold_ty( &mut self, t: <I as Interner>::Ty, ) -> Result<<I as Interner>::Ty, !>

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fn try_fold_region( &mut self, r: <I as Interner>::Region, ) -> Result<<I as Interner>::Region, !>

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fn try_fold_const( &mut self, c: <I as Interner>::Const, ) -> Result<<I as Interner>::Const, !>

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fn try_fold_predicate( &mut self, p: <I as Interner>::Predicate, ) -> Result<<I as Interner>::Predicate, !>

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Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts 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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts 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 more
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const ALIGN: usize = _

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type Output = T

Should always be Self
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Performs the conversion.
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