copy_if.h 1.1 KB

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  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. #ifndef _LIBCPP___ALGORITHM_COPY_IF_H
  9. #define _LIBCPP___ALGORITHM_COPY_IF_H
  10. #include <__config>
  11. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  12. # pragma GCC system_header
  13. #endif
  14. _LIBCPP_BEGIN_NAMESPACE_STD
  15. template<class _InputIterator, class _OutputIterator, class _Predicate>
  16. inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
  17. _OutputIterator
  18. copy_if(_InputIterator __first, _InputIterator __last,
  19. _OutputIterator __result, _Predicate __pred)
  20. {
  21. for (; __first != __last; ++__first)
  22. {
  23. if (__pred(*__first))
  24. {
  25. *__result = *__first;
  26. ++__result;
  27. }
  28. }
  29. return __result;
  30. }
  31. _LIBCPP_END_NAMESPACE_STD
  32. #endif // _LIBCPP___ALGORITHM_COPY_IF_H