transform.h 1.5 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_TRANSFORM_H
  9. #define _LIBCPP___ALGORITHM_TRANSFORM_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 _UnaryOperation>
  16. inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
  17. transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) {
  18. for (; __first != __last; ++__first, (void)++__result)
  19. *__result = __op(*__first);
  20. return __result;
  21. }
  22. template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _BinaryOperation>
  23. inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator transform(
  24. _InputIterator1 __first1,
  25. _InputIterator1 __last1,
  26. _InputIterator2 __first2,
  27. _OutputIterator __result,
  28. _BinaryOperation __binary_op) {
  29. for (; __first1 != __last1; ++__first1, (void)++__first2, ++__result)
  30. *__result = __binary_op(*__first1, *__first2);
  31. return __result;
  32. }
  33. _LIBCPP_END_NAMESPACE_STD
  34. #endif // _LIBCPP___ALGORITHM_TRANSFORM_H