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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___CXX03___ALGORITHM_FOR_EACH_H
#define _LIBCPP___CXX03___ALGORITHM_FOR_EACH_H
#include <__cxx03/__algorithm/for_each_segment.h>
#include <__cxx03/__config>
#include <__cxx03/__iterator/segmented_iterator.h>
#include <__cxx03/__ranges/movable_box.h>
#include <__cxx03/__type_traits/enable_if.h>
#include <__cxx03/__utility/in_place.h>
#include <__cxx03/__utility/move.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__cxx03/__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _InputIterator, class _Function>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Function
for_each(_InputIterator __first, _InputIterator __last, _Function __f) {
for (; __first != __last; ++__first)
__f(*__first);
return __f;
}
// __movable_box is available in C++20, but is actually a copyable-box, so optimization is only correct in C++23
#if _LIBCPP_STD_VER >= 23
template <class _SegmentedIterator, class _Function>
requires __is_segmented_iterator<_SegmentedIterator>::value
_LIBCPP_HIDE_FROM_ABI constexpr _Function
for_each(_SegmentedIterator __first, _SegmentedIterator __last, _Function __func) {
ranges::__movable_box<_Function> __wrapped_func(in_place, std::move(__func));
std::__for_each_segment(__first, __last, [&](auto __lfirst, auto __llast) {
__wrapped_func =
ranges::__movable_box<_Function>(in_place, std::for_each(__lfirst, __llast, std::move(*__wrapped_func)));
});
return std::move(*__wrapped_func);
}
#endif // _LIBCPP_STD_VER >= 23
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP___CXX03___ALGORITHM_FOR_EACH_H
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