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_REMOVE_IF_H 10 #define _LIBCPP___ALGORITHM_REMOVE_IF_H 11 12 #include <__algorithm/find_if.h> 13 #include <__config> 14 #include <__utility/move.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_PUSH_MACROS 21 #include <__undef_macros> 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 template <class _ForwardIterator, class _Predicate> 26 _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 27 remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) { 28 __first = std::find_if<_ForwardIterator, _Predicate&>(__first, __last, __pred); 29 if (__first != __last) { 30 _ForwardIterator __i = __first; 31 while (++__i != __last) { 32 if (!__pred(*__i)) { 33 *__first = std::move(*__i); 34 ++__first; 35 } 36 } 37 } 38 return __first; 39 } 40 41 _LIBCPP_END_NAMESPACE_STD 42 43 _LIBCPP_POP_MACROS 44 45 #endif // _LIBCPP___ALGORITHM_REMOVE_IF_H 46