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 # pragma clang include_instead(<algorithm>) 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _ForwardIterator, class _Predicate> 24 _LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 25 remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 26 { 27 __first = _VSTD::find_if<_ForwardIterator, _Predicate&>(__first, __last, __pred); 28 if (__first != __last) 29 { 30 _ForwardIterator __i = __first; 31 while (++__i != __last) 32 { 33 if (!__pred(*__i)) 34 { 35 *__first = _VSTD::move(*__i); 36 ++__first; 37 } 38 } 39 } 40 return __first; 41 } 42 43 _LIBCPP_END_NAMESPACE_STD 44 45 #endif // _LIBCPP___ALGORITHM_REMOVE_IF_H 46