Trait rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt

source · [−]
trait InferCtxtPrivExt<'hir, 'tcx> {

Show 19 methods    fn error_implies(&self, cond: Predicate<'tcx>, error: Predicate<'tcx>) -> bool;
    fn report_fulfillment_error(
        &self,
        error: &FulfillmentError<'tcx>,
        body_id: Option<BodyId>,
        fallback_has_occurred: bool
    );
    fn report_projection_error(
        &self,
        obligation: &PredicateObligation<'tcx>,
        error: &MismatchedProjectionTypes<'tcx>
    );
    fn maybe_detailed_projection_msg(
        &self,
        pred: ProjectionPredicate<'tcx>,
        normalized_ty: Term<'tcx>,
        expected_ty: Term<'tcx>
    ) -> Option<String>;
    fn fuzzy_match_tys(
        &self,
        a: Ty<'tcx>,
        b: Ty<'tcx>,
        ignoring_lifetimes: bool
    ) -> Option<CandidateSimilarity>;
    fn describe_generator(&self, body_id: BodyId) -> Option<&'static str>;
    fn find_similar_impl_candidates(
        &self,
        trait_pred: PolyTraitPredicate<'tcx>
    ) -> Vec<ImplCandidate<'tcx>>;
    fn report_similar_impl_candidates(
        &self,
        impl_candidates: Vec<ImplCandidate<'tcx>>,
        trait_ref: PolyTraitRef<'tcx>,
        body_id: HirId,
        err: &mut Diagnostic
    ) -> bool;
    fn get_parent_trait_ref(
        &self,
        code: &ObligationCauseCode<'tcx>
    ) -> Option<(String, Option<Span>)>;
    fn note_version_mismatch(
        &self,
        err: &mut Diagnostic,
        trait_ref: &PolyTraitRef<'tcx>
    ) -> bool;
    fn mk_trait_obligation_with_new_self_ty(
        &self,
        param_env: ParamEnv<'tcx>,
        trait_ref_and_ty: Binder<'tcx, (TraitPredicate<'tcx>, Ty<'tcx>)>
    ) -> PredicateObligation<'tcx>;
    fn maybe_report_ambiguity(
        &self,
        obligation: &PredicateObligation<'tcx>,
        body_id: Option<BodyId>
    );
    fn predicate_can_apply(
        &self,
        param_env: ParamEnv<'tcx>,
        pred: PolyTraitRef<'tcx>
    ) -> bool;
    fn note_obligation_cause(
        &self,
        err: &mut Diagnostic,
        obligation: &PredicateObligation<'tcx>
    );
    fn suggest_unsized_bound_if_applicable(
        &self,
        err: &mut Diagnostic,
        obligation: &PredicateObligation<'tcx>
    );
    fn annotate_source_of_ambiguity(
        &self,
        err: &mut Diagnostic,
        impls: &[DefId],
        predicate: Predicate<'tcx>
    );
    fn maybe_suggest_unsized_generics(
        &self,
        err: &mut Diagnostic,
        span: Span,
        node: Node<'hir>
    );
    fn maybe_indirection_for_unsized(
        &self,
        err: &mut Diagnostic,
        item: &'hir Item<'hir>,
        param: &'hir GenericParam<'hir>
    ) -> bool;
    fn is_recursive_obligation(
        &self,
        obligated_types: &mut Vec<Ty<'tcx>>,
        cause_code: &ObligationCauseCode<'tcx>
    ) -> bool;

}

Required Methods

Gets the parent trait chain start

If the Self type of the unsatisfied trait trait_ref implements a trait with the same path as trait_ref, a help message about a probable version mismatch is added to err

Creates a PredicateObligation with new_self_ty replacing the existing type in the trait_ref.

For this to work, new_self_ty must have no escaping bound variables.

Implementors