v1/__algorithm/transform.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_TRANSFORM_H
0010 #define _LIBCPP___ALGORITHM_TRANSFORM_H
0011
0012 #include <__config>
0013
0014 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0015 #  pragma GCC system_header
0016 #endif
0017
0018 _LIBCPP_BEGIN_NAMESPACE_STD
0019
0020 template <class _InputIterator, class _OutputIterator, class _UnaryOperation>
0021 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
0022 transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) {
0023   for (; __first != __last; ++__first, (void)++__result)
0024     *__result = __op(*__first);
0025   return __result;
0026 }
0027
0028 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _BinaryOperation>
0029 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator transform(
0030     _InputIterator1 __first1,
0031     _InputIterator1 __last1,
0032     _InputIterator2 __first2,
0033     _OutputIterator __result,
0034     _BinaryOperation __binary_op) {
0035   for (; __first1 != __last1; ++__first1, (void)++__first2, ++__result)
0036     *__result = __binary_op(*__first1, *__first2);
0037   return __result;
0038 }
0039
0040 _LIBCPP_END_NAMESPACE_STD
0041
0042 #endif // _LIBCPP___ALGORITHM_TRANSFORM_H