1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___ALGORITHM_FOR_EACH_H
11#define _LIBCPP___ALGORITHM_FOR_EACH_H
12
13#include <__algorithm/for_each_segment.h>
14#include <__config>
15#include <__iterator/segmented_iterator.h>
16#include <__ranges/movable_box.h>
17#include <__type_traits/enable_if.h>
18#include <__utility/in_place.h>
19#include <__utility/move.h>
20
21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
22#  pragma GCC system_header
23#endif
24
25_LIBCPP_PUSH_MACROS
26#include <__undef_macros>
27
28_LIBCPP_BEGIN_NAMESPACE_STD
29
30template <class _InputIterator, class _Function>
31_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Function
32for_each(_InputIterator __first, _InputIterator __last, _Function __f) {
33  for (; __first != __last; ++__first)
34    __f(*__first);
35  return __f;
36}
37
38// __movable_box is available in C++20, but is actually a copyable-box, so optimization is only correct in C++23
39#if _LIBCPP_STD_VER >= 23
40template <class _SegmentedIterator, class _Function>
41  requires __is_segmented_iterator<_SegmentedIterator>::value
42_LIBCPP_HIDE_FROM_ABI constexpr _Function
43for_each(_SegmentedIterator __first, _SegmentedIterator __last, _Function __func) {
44  ranges::__movable_box<_Function> __wrapped_func(in_place, std::move(__func));
45  std::__for_each_segment(__first, __last, [&](auto __lfirst, auto __llast) {
46    __wrapped_func =
47        ranges::__movable_box<_Function>(in_place, std::for_each(__lfirst, __llast, std::move(*__wrapped_func)));
48  });
49  return std::move(*__wrapped_func);
50}
51#endif // _LIBCPP_STD_VER >= 23
52
53_LIBCPP_END_NAMESPACE_STD
54
55_LIBCPP_POP_MACROS
56
57#endif // _LIBCPP___ALGORITHM_FOR_EACH_H
58