diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h')
| -rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h | 61 |
1 files changed, 27 insertions, 34 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h b/contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h index ebaed15ae2ad..d66ea9b97345 100644 --- a/contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h +++ b/contrib/llvm-project/libcxx/include/__algorithm/next_permutation.h @@ -26,50 +26,43 @@ _LIBCPP_BEGIN_NAMESPACE_STD template <class _AlgPolicy, class _Compare, class _BidirectionalIterator, class _Sentinel> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_BidirectionalIterator, bool> -__next_permutation(_BidirectionalIterator __first, _Sentinel __last, _Compare&& __comp) -{ - using _Result = pair<_BidirectionalIterator, bool>; +__next_permutation(_BidirectionalIterator __first, _Sentinel __last, _Compare&& __comp) { + using _Result = pair<_BidirectionalIterator, bool>; - _BidirectionalIterator __last_iter = _IterOps<_AlgPolicy>::next(__first, __last); - _BidirectionalIterator __i = __last_iter; - if (__first == __last || __first == --__i) - return _Result(std::move(__last_iter), false); + _BidirectionalIterator __last_iter = _IterOps<_AlgPolicy>::next(__first, __last); + _BidirectionalIterator __i = __last_iter; + if (__first == __last || __first == --__i) + return _Result(std::move(__last_iter), false); - while (true) - { - _BidirectionalIterator __ip1 = __i; - if (__comp(*--__i, *__ip1)) - { - _BidirectionalIterator __j = __last_iter; - while (!__comp(*__i, *--__j)) - ; - _IterOps<_AlgPolicy>::iter_swap(__i, __j); - std::__reverse<_AlgPolicy>(__ip1, __last_iter); - return _Result(std::move(__last_iter), true); - } - if (__i == __first) - { - std::__reverse<_AlgPolicy>(__first, __last_iter); - return _Result(std::move(__last_iter), false); - } + while (true) { + _BidirectionalIterator __ip1 = __i; + if (__comp(*--__i, *__ip1)) { + _BidirectionalIterator __j = __last_iter; + while (!__comp(*__i, *--__j)) + ; + _IterOps<_AlgPolicy>::iter_swap(__i, __j); + std::__reverse<_AlgPolicy>(__ip1, __last_iter); + return _Result(std::move(__last_iter), true); } + if (__i == __first) { + std::__reverse<_AlgPolicy>(__first, __last_iter); + return _Result(std::move(__last_iter), false); + } + } } template <class _BidirectionalIterator, class _Compare> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -bool -next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool +next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) { return std::__next_permutation<_ClassicAlgPolicy>( - std::move(__first), std::move(__last), static_cast<__comp_ref_type<_Compare> >(__comp)).second; + std::move(__first), std::move(__last), static_cast<__comp_ref_type<_Compare> >(__comp)) + .second; } template <class _BidirectionalIterator> -inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 -bool -next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) -{ - return std::next_permutation(__first, __last, __less<>()); +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool +next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) { + return std::next_permutation(__first, __last, __less<>()); } _LIBCPP_END_NAMESPACE_STD |
