mirror of https://github.com/axmolengine/axmol.git
84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Filip Matzner 2015
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_ACTION_SHUFFLE_HPP
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#define RANGES_V3_ACTION_SHUFFLE_HPP
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/action/action.hpp>
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#include <range/v3/algorithm/shuffle.hpp>
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#include <range/v3/functional/bind.hpp>
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#include <range/v3/functional/bind_back.hpp>
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#include <range/v3/functional/invoke.hpp>
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#include <range/v3/iterator/concepts.hpp>
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#include <range/v3/iterator/traits.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \addtogroup group-actions
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/// @{
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namespace actions
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{
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struct shuffle_fn
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{
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template(typename Gen)(
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requires uniform_random_bit_generator<Gen>)
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constexpr auto operator()(Gen & gen) const
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{
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return make_action_closure(
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bind_back(shuffle_fn{}, detail::reference_wrapper_<Gen>(gen)));
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}
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template(typename Gen)(
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requires uniform_random_bit_generator<Gen>)
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constexpr auto operator()(Gen && gen) const
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{
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return make_action_closure(
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bind_back(shuffle_fn{}, static_cast<Gen &&>(gen)));
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}
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template(typename Rng, typename Gen)(
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requires random_access_range<Rng> AND permutable<iterator_t<Rng>> AND
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uniform_random_bit_generator<std::remove_reference_t<Gen>> AND
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convertible_to<invoke_result_t<Gen &>, range_difference_t<Rng>>)
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Rng operator()(Rng && rng, Gen && gen) const
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{
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ranges::shuffle(rng, static_cast<Gen &&>(gen));
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return static_cast<Rng &&>(rng);
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}
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/// \cond
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template<typename Rng, typename T>
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invoke_result_t<shuffle_fn, Rng, T &> //
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operator()(Rng && rng, detail::reference_wrapper_<T> r) const
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{
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return (*this)(static_cast<Rng &&>(rng), r.get());
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}
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/// \endcond
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};
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/// \relates actions::shuffle_fn
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/// \sa `action_closure`
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RANGES_INLINE_VARIABLE(shuffle_fn, shuffle)
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} // namespace actions
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#endif
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