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https://github.com/bolero-MURAKAMI/Sprout.git
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74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
#ifndef SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP
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#define SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP
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#include <sprout/config.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/algorithm/fixed/next_permutation.hpp>
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#include <sprout/algorithm/fit/result_of.hpp>
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#include <sprout/sub_array.hpp>
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#include <sprout/utility/pair.hpp>
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namespace sprout {
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namespace fit {
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namespace detail {
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template<typename Container, typename Permutation>
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inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
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next_permutation_impl_1(
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Container const& cont,
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Permutation const& perm,
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typename sprout::container_traits<Container>::difference_type offset
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)
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{
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return sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>(
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sprout::sub_copy(
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sprout::get_internal(perm.first),
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offset,
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offset + sprout::size(cont)
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),
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perm.second
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);
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}
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template<typename Container, typename Compare>
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inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
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next_permutation_impl(
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Container const& cont, Compare comp,
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typename sprout::container_traits<Container>::difference_type offset
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)
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{
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return next_permutation_impl_1(cont, sprout::fixed::next_permutation(cont, comp), offset);
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}
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} // namespace detail
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//
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// next_permutation
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//
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template<typename Container, typename Compare>
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inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
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next_permutation(Container const& cont, Compare comp) {
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return sprout::fit::detail::next_permutation_impl(cont, comp, sprout::internal_begin_offset(cont));
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}
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namespace detail {
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template<typename Container>
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inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
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next_permutation_impl(
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Container const& cont,
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typename sprout::container_traits<Container>::difference_type offset
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)
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{
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return next_permutation_impl_1(cont, sprout::fixed::next_permutation(cont), offset);
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}
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} // namespace detail
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//
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// next_permutation
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//
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template<typename Container>
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inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
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next_permutation(Container const& cont) {
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return sprout::fit::detail::next_permutation_impl(cont, sprout::internal_begin_offset(cont));
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}
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} // namespace fit
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP
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