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 
14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15 #  pragma GCC system_header
16 #endif
17 
18 _LIBCPP_BEGIN_NAMESPACE_STD
19 
20 template <class _InputIterator, class _OutputIterator, class _Predicate>
21 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
copy_if(_InputIterator __first,_InputIterator __last,_OutputIterator __result,_Predicate __pred)22 copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) {
23   for (; __first != __last; ++__first) {
24     if (__pred(*__first)) {
25       *__result = *__first;
26       ++__result;
27     }
28   }
29   return __result;
30 }
31 
32 _LIBCPP_END_NAMESPACE_STD
33 
34 #endif // _LIBCPP___ALGORITHM_COPY_IF_H
35