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_TRANSFORM_H
10 #define _LIBCPP___ALGORITHM_TRANSFORM_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 _UnaryOperation>
21 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
22 _OutputIterator
23 transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op)
24 {
25     for (; __first != __last; ++__first, (void) ++__result)
26         *__result = __op(*__first);
27     return __result;
28 }
29 
30 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _BinaryOperation>
31 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
32 _OutputIterator
33 transform(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2,
34           _OutputIterator __result, _BinaryOperation __binary_op)
35 {
36     for (; __first1 != __last1; ++__first1, (void) ++__first2, ++__result)
37         *__result = __binary_op(*__first1, *__first2);
38     return __result;
39 }
40 
41 _LIBCPP_END_NAMESPACE_STD
42 
43 #endif // _LIBCPP___ALGORITHM_TRANSFORM_H
44