mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
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/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_RANDOM_GENERATE_ARRAY_HPP
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#define SPROUT_RANDOM_GENERATE_ARRAY_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/array/array.hpp>
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#include <sprout/utility/pair/pair.hpp>
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namespace sprout {
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namespace random {
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//
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// generate_array
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//
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template<std::size_t N, typename URNG>
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inline SPROUT_CXX14_CONSTEXPR sprout::array<typename URNG::result_type, N>
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generate_array(URNG& rng) {
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sprout::array<typename URNG::result_type, N> result{{}};
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for (std::size_t i = 0; i != N; ++i) {
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result[i] = rng();
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}
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return result;
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}
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namespace detail {
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template<std::size_t N, typename URNG, typename Random, typename... Args>
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static SPROUT_CONSTEXPR typename std::enable_if<
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(sizeof...(Args) + 1 == N),
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sprout::pair<sprout::array<typename URNG::result_type, N>, URNG> const
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>::type generate_array_impl(Random const& rnd, Args const&... args) {
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typedef sprout::pair<sprout::array<typename URNG::result_type, N>, URNG> const pair_type;
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return pair_type{
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sprout::array<typename URNG::result_type, N>{{args..., rnd.result()}},
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rnd.engine()
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};
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}
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template<std::size_t N, typename URNG, typename Random, typename... Args>
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static SPROUT_CONSTEXPR typename std::enable_if<
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(sizeof...(Args) + 1 < N),
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sprout::pair<sprout::array<typename URNG::result_type, N>, URNG> const
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>::type generate_array_impl(Random const& rnd, Args const&... args) {
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return sprout::random::detail::generate_array_impl<N, URNG>(rnd(), args..., rnd.result());
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}
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} // namespace detail
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//
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// generate_array
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//
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template<std::size_t N, typename URNG>
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inline SPROUT_CONSTEXPR sprout::pair<sprout::array<typename URNG::result_type, N>, URNG> const
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generate_array(URNG const& rng) {
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return sprout::random::detail::generate_array_impl<N, URNG>(rng());
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}
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} // namespace random
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} // namespace sprout
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#endif // #ifndef SPROUT_RANDOM_GENERATE_ARRAY_HPP
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