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_PUSH_MACROS 19 #include <__undef_macros> 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _InputIterator, class _Predicate> 24 _LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 25 is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) 26 { 27 for (; __first != __last; ++__first) 28 if (!__pred(*__first)) 29 break; 30 if ( __first == __last ) 31 return true; 32 ++__first; 33 for (; __first != __last; ++__first) 34 if (__pred(*__first)) 35 return false; 36 return true; 37 } 38 39 _LIBCPP_END_NAMESPACE_STD 40 41 _LIBCPP_POP_MACROS 42 43 #endif // _LIBCPP___ALGORITHM_IS_PARTITIONED_H 44