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 30 template <class _InputIterator, class _Function> 31 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Function 32 for_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 40 template <class _SegmentedIterator, class _Function> 41 requires __is_segmented_iterator<_SegmentedIterator>::value 42 _LIBCPP_HIDE_FROM_ABI constexpr _Function 43 for_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