Function rustc_mir::monomorphize::polymorphize::unused_generic_params

pub(in monomorphize::polymorphize) fn unused_generic_params(
    tcx: TyCtxt<'_>, 
    def_id: DefId
) -> FiniteBitSet<u32>

Determine which generic parameters are used by the function/method/closure represented by def_id. Returns a bitset where bits representing unused parameters are set (is_empty indicates all parameters are used).