38 template(
typename Gen)(
40 constexpr auto operator()(Gen & gen)
const
42 return make_action_closure(
43 bind_back(
shuffle_fn{}, detail::reference_wrapper_<Gen>(gen)));
46 template(
typename Gen)(
48 constexpr auto operator()(Gen && gen)
const
50 return make_action_closure(
51 bind_back(
shuffle_fn{},
static_cast<Gen &&
>(gen)));
54 template(
typename Rng,
typename Gen)(
57 convertible_to<invoke_result_t<Gen &>, range_difference_t<Rng>>)
58 Rng operator()(Rng && rng, Gen && gen)
const
60 ranges::shuffle(rng,
static_cast<Gen &&
>(gen));
61 return static_cast<Rng &&
>(rng);
65 template<
typename Rng,
typename T>
66 invoke_result_t<shuffle_fn, Rng, T &>
67 operator()(Rng && rng, detail::reference_wrapper_<T> r)
const
69 return (*
this)(
static_cast<Rng &&
>(rng), r.get());