Function rustc_trait_selection::traits::project::confirm_closure_candidate

fn confirm_closure_candidate<'cx, 'tcx>(
    selcx: &mut SelectionContext<'cx, 'tcx>,
    obligation: &Obligation<'tcx, ProjectionTy<'tcx>>,
    impl_source: ImplSourceClosureData<'tcx, PredicateObligation<'tcx>>
) -> Progress<'tcx>