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 # pragma clang include_instead(<algorithm>) 17 #endif 18 19 _LIBCPP_BEGIN_NAMESPACE_STD 20 21 template <class _InputIterator, class _Predicate> 22 _LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 23 is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) 24 { 25 for (; __first != __last; ++__first) 26 if (!__pred(*__first)) 27 break; 28 if ( __first == __last ) 29 return true; 30 ++__first; 31 for (; __first != __last; ++__first) 32 if (__pred(*__first)) 33 return false; 34 return true; 35 } 36 37 _LIBCPP_END_NAMESPACE_STD 38 39 #endif // _LIBCPP___ALGORITHM_IS_PARTITIONED_H 40