1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_IS_PARTITIONED_H 10 #define _LIBCPP___ALGORITHM_IS_PARTITIONED_H 11 12 #include <__config> 13 14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15 # pragma GCC system_header 16 #endif 17 18 _LIBCPP_BEGIN_NAMESPACE_STD 19 20 template <class _InputIterator, class _Predicate> 21 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 22 is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) 23 { 24 for (; __first != __last; ++__first) 25 if (!__pred(*__first)) 26 break; 27 if ( __first == __last ) 28 return true; 29 ++__first; 30 for (; __first != __last; ++__first) 31 if (__pred(*__first)) 32 return false; 33 return true; 34 } 35 36 _LIBCPP_END_NAMESPACE_STD 37 38 #endif // _LIBCPP___ALGORITHM_IS_PARTITIONED_H 39