rustc_ty_utils::ty

Function sizedness_constraint_for_ty

Source 
fn sizedness_constraint_for_ty<'tcx>(
    tcx: TyCtxt<'tcx>,
    sizedness: SizedTraitKind,
    ty: Ty<'tcx>,
) -> Option<Ty<'tcx>>
Expand description

If ty implements the given sizedness trait, returns None. Otherwise, returns the type that must implement the given sizedness for ty to implement it.