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 <__config> 13 #include <__algorithm/find_if.h> 14 #include <utility> 15 #include <type_traits> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 #pragma GCC system_header 19 #endif 20 21 _LIBCPP_PUSH_MACROS 22 #include <__undef_macros> 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 template <class _ForwardIterator, class _Predicate> 27 _LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 28 remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 29 { 30 __first = _VSTD::find_if<_ForwardIterator, typename add_lvalue_reference<_Predicate>::type> 31 (__first, __last, __pred); 32 if (__first != __last) 33 { 34 _ForwardIterator __i = __first; 35 while (++__i != __last) 36 { 37 if (!__pred(*__i)) 38 { 39 *__first = _VSTD::move(*__i); 40 ++__first; 41 } 42 } 43 } 44 return __first; 45 } 46 47 _LIBCPP_END_NAMESPACE_STD 48 49 _LIBCPP_POP_MACROS 50 51 #endif // _LIBCPP___ALGORITHM_REMOVE_IF_H 52