Function rustc_middle::ty::relate::relate_substs_with_variances
source · pub fn relate_substs_with_variances<'tcx, R: TypeRelation<'tcx>>(
relation: &mut R,
ty_def_id: DefId,
variances: &[Variance],
a_subst: SubstsRef<'tcx>,
b_subst: SubstsRef<'tcx>
) -> RelateResult<'tcx, SubstsRef<'tcx>>