Struct rustc_trait_selection::solve::FulfillmentCtxt

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pub struct FulfillmentCtxt<'tcx> {
    obligations: ObligationStorage<'tcx>,
    usable_in_snapshot: usize,
}
Expand description

A trait engine using the new trait solver.

This is mostly identical to how evaluate_all works inside of the solver, except that the requirements are slightly different.

Unlike evaluate_all it is possible to add new obligations later on and we also have to track diagnostics information by using Obligation instead of Goal.

It is also likely that we want to use slightly different datastructures here as this will have to deal with far more root goals than evaluate_all.

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§obligations: ObligationStorage<'tcx>§usable_in_snapshot: usize

The snapshot in which this context was created. Using the context outside of this snapshot leads to subtle bugs if the snapshot gets rolled back. Because of this we explicitly check that we only use the context in exactly this snapshot.

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impl<'tcx> FulfillmentCtxt<'tcx>

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pub fn new(infcx: &InferCtxt<'tcx>) -> FulfillmentCtxt<'tcx>

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fn inspect_evaluated_obligation( &self, infcx: &InferCtxt<'tcx>, obligation: &PredicateObligation<'tcx>, result: &Result<(bool, Certainty), NoSolution> )

Trait Implementations§

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impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx>

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fn register_predicate_obligation( &mut self, infcx: &InferCtxt<'tcx>, obligation: PredicateObligation<'tcx> )

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fn collect_remaining_errors( &mut self, infcx: &InferCtxt<'tcx> ) -> Vec<FulfillmentError<'tcx>>

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fn select_where_possible( &mut self, infcx: &InferCtxt<'tcx> ) -> Vec<FulfillmentError<'tcx>>

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fn pending_obligations(&self) -> Vec<PredicateObligation<'tcx>>

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fn drain_unstalled_obligations( &mut self, _: &InferCtxt<'tcx> ) -> Vec<PredicateObligation<'tcx>>

Among all pending obligations, collect those are stalled on a inference variable which has changed since the last call to select_where_possible. Those obligations are marked as successful and returned.
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fn register_bound( &mut self, infcx: &InferCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: Ty<'tcx>, def_id: DefId, cause: ObligationCause<'tcx> )

Requires that ty must implement the trait with def_id in the given environment. This trait must not have any type parameters (except for Self).

Auto Trait Implementations§

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impl<'tcx> DynSend for FulfillmentCtxt<'tcx>

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impl<'tcx> DynSync for FulfillmentCtxt<'tcx>

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impl<'tcx> Freeze for FulfillmentCtxt<'tcx>

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

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impl<'tcx> Send for FulfillmentCtxt<'tcx>

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impl<'tcx> Sync for FulfillmentCtxt<'tcx>

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impl<'tcx> Unpin for FulfillmentCtxt<'tcx>

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impl<'tcx> !UnwindSafe for FulfillmentCtxt<'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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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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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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impl<P> IntoQueryParam<P> for P

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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

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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> TraitEngineExt<'tcx> for T
where T: TraitEngine<'tcx> + ?Sized,

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fn register_predicate_obligations( &mut self, infcx: &InferCtxt<'tcx>, obligations: impl IntoIterator<Item = Obligation<'tcx, Predicate<'tcx>>> )

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fn select_all_or_error( &mut self, infcx: &InferCtxt<'tcx> ) -> Vec<FulfillmentError<'tcx>>

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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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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

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fn vzip(self) -> V

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

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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: 56 bytes