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add next_permutatin, prev_premutation

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bolero-MURAKAMI 2012-07-25 14:27:01 +09:00
parent e3511d71b0
commit a64938fad0
12 changed files with 668 additions and 1 deletions
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4
libs/algorithm/test/modifying.cpp
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@ -50,6 +50,8 @@
#include "./make_heap.cpp" #include "./make_heap.cpp"
#include "./make_partial_heap.cpp" #include "./make_partial_heap.cpp"
#include "./sort_heap.cpp" #include "./sort_heap.cpp"
#include "./next_permutation.cpp"
#include "./prev_permutation.cpp"
#include "./swap_element.cpp" #include "./swap_element.cpp"
#include "./swap_element_copy.cpp" #include "./swap_element_copy.cpp"
#include "./bogo_sort.cpp" #include "./bogo_sort.cpp"
@ -105,6 +107,8 @@ namespace testspr {
testspr::algorithm_make_heap_test(); testspr::algorithm_make_heap_test();
testspr::algorithm_make_partial_heap_test(); testspr::algorithm_make_partial_heap_test();
testspr::algorithm_sort_heap_test(); testspr::algorithm_sort_heap_test();
testspr::algorithm_next_permutation_test();
testspr::algorithm_prev_permutation_test();
testspr::algorithm_swap_element_test(); testspr::algorithm_swap_element_test();
testspr::algorithm_swap_element_copy_test(); testspr::algorithm_swap_element_copy_test();
testspr::algorithm_bogo_sort_test(); testspr::algorithm_bogo_sort_test();

137
libs/algorithm/test/next_permutation.cpp Normal file
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@ -0,0 +1,137 @@
#ifndef SPROUT_LIBS_ALGORITHM_TEST_NEXT_PERMUTATION_CPP
#define SPROUT_LIBS_ALGORITHM_TEST_NEXT_PERMUTATION_CPP
#include <sprout/algorithm/next_permutation.hpp>
#include <sprout/array.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/container.hpp>
#include <testspr/tools.hpp>
namespace testspr {
static void algorithm_next_permutation_test() {
using namespace sprout;
{
SPROUT_STATIC_CONSTEXPR auto arr1 = array<int, 5>{{1, 2, 3, 4, 5}};
// 順列
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::next_permutation(
arr1
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{1, 2, 3, 5, 4}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::next_permutation(
arr1
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{1, 2, 3, 5, 4}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
// 順列
// 範囲の切り出し
// !!!
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::next_permutation(
// sprout::sub(arr1, 2, 4)
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{2, 4, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{1, 2, 4, 3, 5}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::next_permutation(
// sprout::sub(arr1, 2, 4)
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{2, 4, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{1, 2, 4, 3, 5}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
}
{
SPROUT_STATIC_CONSTEXPR auto arr1 = array<int, 5>{{1, 2, 3, 4, 5}};
// 順列
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::next_permutation(
arr1,
testspr::less<int>()
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{1, 2, 3, 5, 4}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::next_permutation(
arr1,
testspr::less<int>()
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{1, 2, 3, 5, 4}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
// 順列
// 範囲の切り出し
// !!!
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::next_permutation(
// sprout::sub(arr1, 2, 4),
// testspr::less<int>()
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{2, 4, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{1, 2, 4, 3, 5}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::next_permutation(
// sprout::sub(arr1, 2, 4),
// testspr::less<int>()
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{2, 4, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{1, 2, 4, 3, 5}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
}
}
} // namespace testspr
#ifndef TESTSPR_CPP_INCLUDE
# define TESTSPR_TEST_FUNCTION testspr::algorithm_next_permutation_test
# include <testspr/include_main.hpp>
#endif
#endif // #ifndef SPROUT_LIBS_ALGORITHM_TEST_NEXT_PERMUTATION_CPP

137
libs/algorithm/test/prev_permutation.cpp Normal file
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@ -0,0 +1,137 @@
#ifndef SPROUT_LIBS_ALGORITHM_TEST_PREV_PERMUTATION_CPP
#define SPROUT_LIBS_ALGORITHM_TEST_PREV_PERMUTATION_CPP
#include <sprout/algorithm/prev_permutation.hpp>
#include <sprout/array.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/container.hpp>
#include <testspr/tools.hpp>
namespace testspr {
static void algorithm_prev_permutation_test() {
using namespace sprout;
{
SPROUT_STATIC_CONSTEXPR auto arr1 = array<int, 5>{{5, 4, 3, 2, 1}};
// 順列
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::prev_permutation(
arr1
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{5, 4, 3, 1, 2}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::prev_permutation(
arr1
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{5, 4, 3, 1, 2}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
// 順列
// 範囲の切り出し
// !!!
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::prev_permutation(
// sprout::sub(arr1, 2, 4)
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{4, 2, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{5, 4, 2, 3, 1}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::prev_permutation(
// sprout::sub(arr1, 2, 4)
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{4, 2, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{5, 4, 2, 3, 1}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
}
{
SPROUT_STATIC_CONSTEXPR auto arr1 = array<int, 5>{{5, 4, 3, 2, 1}};
// 順列
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::prev_permutation(
arr1,
testspr::less<int>()
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{5, 4, 3, 1, 2}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
{
SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::prev_permutation(
arr1,
testspr::less<int>()
);
TESTSPR_BOTH_ASSERT(testspr::equal(
permutation.first,
array<int, 5>{{5, 4, 3, 1, 2}}
));
TESTSPR_BOTH_ASSERT(permutation.second);
}
// 順列
// 範囲の切り出し
// !!!
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::prev_permutation(
// sprout::sub(arr1, 2, 4),
// testspr::less<int>()
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{4, 2, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{5, 4, 2, 3, 1}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
// {
// SPROUT_STATIC_CONSTEXPR auto permutation = sprout::fit::prev_permutation(
// sprout::sub(arr1, 2, 4),
// testspr::less<int>()
// );
// TESTSPR_BOTH_ASSERT(testspr::equal(
// permutation.first,
// array<int, 3>{{4, 2, 3}}
// ));
// TESTSPR_BOTH_ASSERT(testspr::equal(
// sprout::get_internal(permutation.first),
// array<int, 5>{{5, 4, 2, 3, 1}}
// ));
// TESTSPR_BOTH_ASSERT(permutation.second);
// }
}
}
} // namespace testspr
#ifndef TESTSPR_CPP_INCLUDE
# define TESTSPR_TEST_FUNCTION testspr::algorithm_prev_permutation_test
# include <testspr/include_main.hpp>
#endif
#endif // #ifndef SPROUT_LIBS_ALGORITHM_TEST_PREV_PERMUTATION_CPP

2
sprout/algorithm/fit.hpp
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@ -46,6 +46,8 @@
#include <sprout/algorithm/fit/make_heap.hpp> #include <sprout/algorithm/fit/make_heap.hpp>
#include <sprout/algorithm/fit/make_partial_heap.hpp> #include <sprout/algorithm/fit/make_partial_heap.hpp>
#include <sprout/algorithm/fit/sort_heap.hpp> #include <sprout/algorithm/fit/sort_heap.hpp>
#include <sprout/algorithm/fit/next_permutation.hpp>
#include <sprout/algorithm/fit/prev_permutation.hpp>
#include <sprout/algorithm/fit/swap_element.hpp> #include <sprout/algorithm/fit/swap_element.hpp>
#include <sprout/algorithm/fit/swap_element_copy.hpp> #include <sprout/algorithm/fit/swap_element_copy.hpp>
#include <sprout/algorithm/fit/bogo_sort.hpp> #include <sprout/algorithm/fit/bogo_sort.hpp>

82
sprout/algorithm/fit/next_permutation.hpp Normal file
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@ -0,0 +1,82 @@
#ifndef SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP
#define SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/algorithm/fixed/next_permutation.hpp>
#include <sprout/algorithm/fit/result_of.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/utility/pair.hpp>
namespace sprout {
namespace fit {
namespace detail {
template<typename Container, typename Permutation>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
next_permutation_impl_1(
Container const& cont,
Permutation const& perm,
typename sprout::container_traits<Container>::difference_type offset
)
{
return sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>(
sprout::sub_copy(
sprout::get_internal(perm.first),
offset,
offset + sprout::size(cont)
),
perm.second
);
}
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
next_permutation_impl(
Container const& cont,
Compare comp,
typename sprout::container_traits<Container>::difference_type offset
)
{
return next_permutation_impl_1(cont, sprout::fixed::next_permutation(cont, comp), offset);
}
} // namespace detail
//
// next_permutation
//
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
next_permutation(
Container const& cont,
Compare comp
)
{
return sprout::fit::detail::next_permutation_impl(cont, comp, sprout::internal_begin_offset(cont));
}
namespace detail {
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
next_permutation_impl(
Container const& cont,
typename sprout::container_traits<Container>::difference_type offset
)
{
return next_permutation_impl_1(cont, sprout::fixed::next_permutation(cont), offset);
}
} // namespace detail
//
// next_permutation
//
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
next_permutation(
Container const& cont
)
{
return sprout::fit::detail::next_permutation_impl(cont, sprout::internal_begin_offset(cont));
}
} // namespace fit
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIT_NEXT_PERMUTATION_HPP

82
sprout/algorithm/fit/prev_permutation.hpp Normal file
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@ -0,0 +1,82 @@
#ifndef SPROUT_ALGORITHM_FIT_PREV_PERMUTATION_HPP
#define SPROUT_ALGORITHM_FIT_PREV_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/algorithm/fixed/prev_permutation.hpp>
#include <sprout/algorithm/fit/result_of.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/utility/pair.hpp>
namespace sprout {
namespace fit {
namespace detail {
template<typename Container, typename Permutation>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
prev_permutation_impl_1(
Container const& cont,
Permutation const& perm,
typename sprout::container_traits<Container>::difference_type offset
)
{
return sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>(
sprout::sub_copy(
sprout::get_internal(perm.first),
offset,
offset + sprout::size(cont)
),
perm.second
);
}
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
prev_permutation_impl(
Container const& cont,
Compare comp,
typename sprout::container_traits<Container>::difference_type offset
)
{
return prev_permutation_impl_1(cont, sprout::fixed::prev_permutation(cont, comp), offset);
}
} // namespace detail
//
// prev_permutation
//
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
prev_permutation(
Container const& cont,
Compare comp
)
{
return sprout::fit::detail::prev_permutation_impl(cont, comp, sprout::internal_begin_offset(cont));
}
namespace detail {
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
prev_permutation_impl(
Container const& cont,
typename sprout::container_traits<Container>::difference_type offset
)
{
return prev_permutation_impl_1(cont, sprout::fixed::prev_permutation(cont), offset);
}
} // namespace detail
//
// prev_permutation
//
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fit::result_of::algorithm<Container>::type, bool>
prev_permutation(
Container const& cont
)
{
return sprout::fit::detail::prev_permutation_impl(cont, sprout::internal_begin_offset(cont));
}
} // namespace fit
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIT_PREV_PERMUTATION_HPP

2
sprout/algorithm/fixed.hpp
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@ -46,6 +46,8 @@
#include <sprout/algorithm/fixed/make_heap.hpp> #include <sprout/algorithm/fixed/make_heap.hpp>
#include <sprout/algorithm/fixed/make_partial_heap.hpp> #include <sprout/algorithm/fixed/make_partial_heap.hpp>
#include <sprout/algorithm/fixed/sort_heap.hpp> #include <sprout/algorithm/fixed/sort_heap.hpp>
#include <sprout/algorithm/fixed/next_permutation.hpp>
#include <sprout/algorithm/fixed/prev_permutation.hpp>
#include <sprout/algorithm/fixed/swap_element.hpp> #include <sprout/algorithm/fixed/swap_element.hpp>
#include <sprout/algorithm/fixed/swap_element_copy.hpp> #include <sprout/algorithm/fixed/swap_element_copy.hpp>
#include <sprout/algorithm/fixed/bogo_sort.hpp> #include <sprout/algorithm/fixed/bogo_sort.hpp>

103
sprout/algorithm/fixed/next_permutation.hpp Normal file
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#ifndef SPROUT_ALGORITHM_FIXED_NEXT_PERMUTATION_HPP
#define SPROUT_ALGORITHM_FIXED_NEXT_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/algorithm/fixed/swap_element.hpp>
#include <sprout/algorithm/fixed/reverse.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/utility/pair.hpp>
#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace fixed {
namespace detail {
template<typename Result, typename Container, typename Difference>
inline SPROUT_CONSTEXPR Result
next_permutation_impl_4(Container const& cont, Difference d) {
return Result(
sprout::get_internal(sprout::fixed::reverse(sprout::sub_array<Container const&>(cont, d, sprout::size(cont)))),
true
);
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
next_permutation_impl_3(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i, Iterator ii, Iterator j) {
return !comp(*i, *sprout::prev(j)) ? sprout::fixed::detail::next_permutation_impl_3<Result>(
cont, comp, first, last,
i, ii, sprout::prev(j)
)
: sprout::fixed::detail::next_permutation_impl_4<Result>(
sprout::fixed::swap_element(cont, i, sprout::prev(j)),
NS_SSCRISK_CEL_OR_SPROUT::distance(first, ii)
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
next_permutation_impl_2(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i, Iterator ii) {
return comp(*i, *ii) ? sprout::fixed::detail::next_permutation_impl_3<Result>(
cont, comp, first, last,
i, ii, last
)
: i == first ? Result(sprout::fixed::reverse_copy(first, last, cont), false)
: sprout::fixed::detail::next_permutation_impl_2<Result>(
cont, comp, first, last,
sprout::prev(i), i
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
next_permutation_impl_1(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i) {
return i == last ? Result(sprout::deep_copy(cont), false)
: sprout::fixed::detail::next_permutation_impl_2<Result>(
cont, comp, first, last,
sprout::prev(last, 2), sprout::prev(last)
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
next_permutation_impl(Container const& cont, Compare comp, Iterator first, Iterator last) {
return first == last ? Result(sprout::deep_copy(cont), false)
: sprout::fixed::detail::next_permutation_impl_1<Result>(
cont, comp, first, last,
sprout::next(first)
);
}
} // namespace detail
//
// next_permutation
//
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool>
next_permutation(Container const& cont, Compare comp) {
typedef sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool> type;
return sprout::fixed::detail::next_permutation_impl<type>(
cont, comp,
sprout::begin(cont), sprout::end(cont)
);
}
//
// next_permutation
//
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool>
next_permutation(Container const& cont) {
typedef sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool> type;
return sprout::fixed::detail::next_permutation_impl<type>(
cont, NS_SSCRISK_CEL_OR_SPROUT::less<typename sprout::container_traits<Container>::value_type>(),
sprout::begin(cont), sprout::end(cont)
);
}
} // namespace fixed
using sprout::fixed::next_permutation;
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIXED_NEXT_PERMUTATION_HPP

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sprout/algorithm/fixed/prev_permutation.hpp Normal file
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#ifndef SPROUT_ALGORITHM_FIXED_PREV_PERMUTATION_HPP
#define SPROUT_ALGORITHM_FIXED_PREV_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/algorithm/fixed/swap_element.hpp>
#include <sprout/algorithm/fixed/reverse.hpp>
#include <sprout/sub_array.hpp>
#include <sprout/utility/pair.hpp>
#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace fixed {
namespace detail {
template<typename Result, typename Container, typename Difference>
inline SPROUT_CONSTEXPR Result
prev_permutation_impl_4(Container const& cont, Difference d) {
return Result(
sprout::get_internal(sprout::fixed::reverse(sprout::sub_array<Container const&>(cont, d, sprout::size(cont)))),
true
);
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
prev_permutation_impl_3(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i, Iterator ii, Iterator j) {
return !comp(*sprout::prev(j), *i) ? sprout::fixed::detail::prev_permutation_impl_3<Result>(
cont, comp, first, last,
i, ii, sprout::prev(j)
)
: sprout::fixed::detail::prev_permutation_impl_4<Result>(
sprout::fixed::swap_element(cont, i, sprout::prev(j)),
NS_SSCRISK_CEL_OR_SPROUT::distance(first, ii)
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
prev_permutation_impl_2(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i, Iterator ii) {
return comp(*ii, *i) ? sprout::fixed::detail::prev_permutation_impl_3<Result>(
cont, comp, first, last,
i, ii, last
)
: i == first ? Result(sprout::fixed::reverse_copy(first, last, cont), false)
: sprout::fixed::detail::prev_permutation_impl_2<Result>(
cont, comp, first, last,
sprout::prev(i), i
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
prev_permutation_impl_1(Container const& cont, Compare comp, Iterator first, Iterator last, Iterator i) {
return i == last ? Result(sprout::deep_copy(cont), false)
: sprout::fixed::detail::prev_permutation_impl_2<Result>(
cont, comp, first, last,
sprout::prev(last, 2), sprout::prev(last)
)
;
}
template<typename Result, typename Container, typename Compare, typename Iterator>
inline SPROUT_CONSTEXPR Result
prev_permutation_impl(Container const& cont, Compare comp, Iterator first, Iterator last) {
return first == last ? Result(sprout::deep_copy(cont), false)
: sprout::fixed::detail::prev_permutation_impl_1<Result>(
cont, comp, first, last,
sprout::next(first)
);
}
} // namespace detail
//
// prev_permutation
//
template<typename Container, typename Compare>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool>
prev_permutation(Container const& cont, Compare comp) {
typedef sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool> type;
return sprout::fixed::detail::prev_permutation_impl<type>(
cont, comp,
sprout::begin(cont), sprout::end(cont)
);
}
//
// prev_permutation
//
template<typename Container>
inline SPROUT_CONSTEXPR sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool>
prev_permutation(Container const& cont) {
typedef sprout::pair<typename sprout::fixed::result_of::algorithm<Container>::type, bool> type;
return sprout::fixed::detail::prev_permutation_impl<type>(
cont, NS_SSCRISK_CEL_OR_SPROUT::less<typename sprout::container_traits<Container>::value_type>(),
sprout::begin(cont), sprout::end(cont)
);
}
} // namespace fixed
using sprout::fixed::prev_permutation;
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIXED_PREV_PERMUTATION_HPP

8
sprout/algorithm/next_permutation.hpp Normal file
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@ -0,0 +1,8 @@
#ifndef SPROUT_ALGORITHM_NEXT_PERMUTATION_HPP
#define SPROUT_ALGORITHM_NEXT_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/algorithm/fixed/next_permutation.hpp>
#include <sprout/algorithm/fit/next_permutation.hpp>
#endif // #ifndef SPROUT_ALGORITHM_NEXT_PERMUTATION_HPP

8
sprout/algorithm/prev_permutation.hpp Normal file
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@ -0,0 +1,8 @@
#ifndef SPROUT_ALGORITHM_PREV_PERMUTATION_HPP
#define SPROUT_ALGORITHM_PREV_PERMUTATION_HPP
#include <sprout/config.hpp>
#include <sprout/algorithm/fixed/prev_permutation.hpp>
#include <sprout/algorithm/fit/prev_permutation.hpp>
#endif // #ifndef SPROUT_ALGORITHM_PREV_PERMUTATION_HPP

1
sprout/sub_array/sub.hpp
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@ -10,7 +10,6 @@
#include <sprout/sub_array/type_traits.hpp> #include <sprout/sub_array/type_traits.hpp>
namespace sprout { namespace sprout {
// //
// sub // sub
// //