pub struct EvaluationCache<'tcx> {
    map: Lock<HashMap<Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, CacheEntry<'tcx>, BuildHasherDefault<FxHasher>>>,
}
Expand description

The trait solver cache used by -Znext-solver.

FIXME(@lcnr): link to some official documentation of how this works.

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§map: Lock<HashMap<Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, CacheEntry<'tcx>, BuildHasherDefault<FxHasher>>>

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impl<'tcx> EvaluationCache<'tcx>

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pub fn insert( &self, tcx: TyCtxt<'tcx>, key: Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, proof_tree: Option<&'tcx [GoalEvaluationStep<'tcx>]>, reached_depth: usize, encountered_overflow: bool, cycle_participants: HashSet<Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, BuildHasherDefault<FxHasher>>, dep_node: DepNodeIndex, result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution> )

Insert a final result into the global cache.

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pub fn get( &self, tcx: TyCtxt<'tcx>, key: Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, cycle_participant_in_stack: impl FnOnce(&HashSet<Canonical<TyCtxt<'tcx>, QueryInput<'tcx, Predicate<'tcx>>>, BuildHasherDefault<FxHasher>>) -> bool, available_depth: Limit ) -> Option<CacheData<'tcx>>

Try to fetch a cached result, checking the recursion limit and handling root goals of coinductive cycles.

If this returns Some the cache result can be used.

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impl<'tcx> Default for EvaluationCache<'tcx>

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fn default() -> EvaluationCache<'tcx>

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<'tcx> DynSend for EvaluationCache<'tcx>

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impl<'tcx> DynSync for EvaluationCache<'tcx>

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impl<'tcx> !RefUnwindSafe for EvaluationCache<'tcx>

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impl<'tcx> Send for EvaluationCache<'tcx>

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impl<'tcx> !Sync for EvaluationCache<'tcx>

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impl<'tcx> Unpin for EvaluationCache<'tcx>

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impl<'tcx> !UnwindSafe for EvaluationCache<'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
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<T> Filterable for T

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fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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impl<T> ErasedDestructor for T
where T: 'static,

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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: 40 bytes