Struct rustc_trait_selection::traits::chalk_fulfill::FulfillmentContext

pub struct FulfillmentContext<'tcx> {
    obligations: FxIndexSet<PredicateObligation<'tcx>>,
    usable_in_snapshot: usize,
}

Fields

obligations: FxIndexSet<PredicateObligation<'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.

Implementations

impl<'tcx> FulfillmentContext<'tcx>

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

Trait Implementations

impl<'tcx> TraitEngine<'tcx> for FulfillmentContext<'tcx>

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

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

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

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.

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

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).

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:64 bytes