Struct rustc_trait_selection::solve::fulfill::FulfillmentCtxt
source · pub struct FulfillmentCtxt<'tcx, E: 'tcx> {
obligations: ObligationStorage<'tcx>,
usable_in_snapshot: usize,
_errors: PhantomData<E>,
}
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
.
Fields§
§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.
_errors: PhantomData<E>
Implementations§
source§impl<'tcx, E: 'tcx> FulfillmentCtxt<'tcx, E>
impl<'tcx, E: 'tcx> FulfillmentCtxt<'tcx, E>
pub fn new(infcx: &InferCtxt<'tcx>) -> FulfillmentCtxt<'tcx, E>
fn inspect_evaluated_obligation( &self, infcx: &InferCtxt<'tcx>, obligation: &PredicateObligation<'tcx>, result: &Result<(bool, Certainty), NoSolution>, )
Trait Implementations§
source§impl<'tcx, E> TraitEngine<'tcx, E> for FulfillmentCtxt<'tcx, E>where
E: FromSolverError<'tcx, NextSolverError<'tcx>>,
impl<'tcx, E> TraitEngine<'tcx, E> for FulfillmentCtxt<'tcx, E>where
E: FromSolverError<'tcx, NextSolverError<'tcx>>,
fn register_predicate_obligation( &mut self, infcx: &InferCtxt<'tcx>, obligation: PredicateObligation<'tcx>, )
fn collect_remaining_errors(&mut self, infcx: &InferCtxt<'tcx>) -> Vec<E>
fn select_where_possible(&mut self, infcx: &InferCtxt<'tcx>) -> Vec<E>
fn pending_obligations(&self) -> Vec<PredicateObligation<'tcx>>
source§fn drain_unstalled_obligations(
&mut self,
_: &InferCtxt<'tcx>,
) -> Vec<PredicateObligation<'tcx>>
fn drain_unstalled_obligations( &mut self, _: &InferCtxt<'tcx>, ) -> Vec<PredicateObligation<'tcx>>
select_where_possible
. Those obligations are marked as
successful and returned.source§fn register_bound(
&mut self,
infcx: &InferCtxt<'tcx>,
param_env: ParamEnv<'tcx>,
ty: Ty<'tcx>,
def_id: DefId,
cause: ObligationCause<'tcx>,
)
fn register_bound( &mut self, infcx: &InferCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: Ty<'tcx>, def_id: DefId, cause: ObligationCause<'tcx>, )
ty
must implement the trait with def_id
in
the given environment. This trait must not have any type
parameters (except for Self
).fn register_predicate_obligations( &mut self, infcx: &InferCtxt<'tcx>, obligations: Vec<Obligation<'tcx, Predicate<'tcx>>>, )
fn select_all_or_error(&mut self, infcx: &InferCtxt<'tcx>) -> Vec<E>
Auto Trait Implementations§
impl<'tcx, E> Freeze for FulfillmentCtxt<'tcx, E>
impl<'tcx, E> !RefUnwindSafe for FulfillmentCtxt<'tcx, E>
impl<'tcx, E> !Send for FulfillmentCtxt<'tcx, E>
impl<'tcx, E> !Sync for FulfillmentCtxt<'tcx, E>
impl<'tcx, E> Unpin for FulfillmentCtxt<'tcx, E>where
E: Unpin,
impl<'tcx, E> !UnwindSafe for FulfillmentCtxt<'tcx, E>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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 moresource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
Layout§
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