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 <__functional/identity.h>
16#include <__iterator/segmented_iterator.h>
17#include <__type_traits/enable_if.h>
18#include <__type_traits/invoke.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 _Sent, class _Func, class _Proj>
31_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _InputIterator
32__for_each(_InputIterator __first, _Sent __last, _Func& __f, _Proj& __proj) {
33  for (; __first != __last; ++__first)
34    std::__invoke(__f, std::__invoke(__proj, *__first));
35  return __first;
36}
37
38#ifndef _LIBCPP_CXX03_LANG
39template <class _SegmentedIterator,
40          class _Func,
41          class _Proj,
42          __enable_if_t<__is_segmented_iterator<_SegmentedIterator>::value, int> = 0>
43_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _SegmentedIterator
44__for_each(_SegmentedIterator __first, _SegmentedIterator __last, _Func& __func, _Proj& __proj) {
45  using __local_iterator_t = typename __segmented_iterator_traits<_SegmentedIterator>::__local_iterator;
46  std::__for_each_segment(__first, __last, [&](__local_iterator_t __lfirst, __local_iterator_t __llast) {
47    std::__for_each(__lfirst, __llast, __func, __proj);
48  });
49  return __last;
50}
51#endif // !_LIBCPP_CXX03_LANG
52
53template <class _InputIterator, class _Func>
54_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Func
55for_each(_InputIterator __first, _InputIterator __last, _Func __f) {
56  __identity __proj;
57  std::__for_each(__first, __last, __f, __proj);
58  return __f;
59}
60
61_LIBCPP_END_NAMESPACE_STD
62
63_LIBCPP_POP_MACROS
64
65#endif // _LIBCPP___ALGORITHM_FOR_EACH_H