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_COPY_IF_H 10 #define _LIBCPP___ALGORITHM_COPY_IF_H 11 12 #include <__config> 13 #include <__algorithm/unwrap_iter.h> 14 #include <__iterator/iterator_traits.h> 15 #include <cstring> 16 #include <type_traits> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 #pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 template<class _InputIterator, class _OutputIterator, class _Predicate> 25 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 26 _OutputIterator 27 copy_if(_InputIterator __first, _InputIterator __last, 28 _OutputIterator __result, _Predicate __pred) 29 { 30 for (; __first != __last; ++__first) 31 { 32 if (__pred(*__first)) 33 { 34 *__result = *__first; 35 ++__result; 36 } 37 } 38 return __result; 39 } 40 41 _LIBCPP_END_NAMESPACE_STD 42 43 #endif // _LIBCPP___ALGORITHM_COPY_IF_H 44