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 <__utility/in_place.h> 18 #include <__utility/move.h> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 _LIBCPP_PUSH_MACROS 25 #include <__undef_macros> 26 27 _LIBCPP_BEGIN_NAMESPACE_STD 28 29 template <class _InputIterator, class _Function> 30 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Function 31 for_each(_InputIterator __first, _InputIterator __last, _Function __f) { 32 for (; __first != __last; ++__first) 33 __f(*__first); 34 return __f; 35 } 36 37 // __movable_box is available in C++20, but is actually a copyable-box, so optimization is only correct in C++23 38 #if _LIBCPP_STD_VER >= 23 39 template <class _SegmentedIterator, class _Function> 40 requires __is_segmented_iterator<_SegmentedIterator>::value 41 _LIBCPP_HIDE_FROM_ABI constexpr _Function 42 for_each(_SegmentedIterator __first, _SegmentedIterator __last, _Function __func) { 43 ranges::__movable_box<_Function> __wrapped_func(in_place, std::move(__func)); 44 std::__for_each_segment(__first, __last, [&](auto __lfirst, auto __llast) { 45 __wrapped_func = 46 ranges::__movable_box<_Function>(in_place, std::for_each(__lfirst, __llast, std::move(*__wrapped_func))); 47 }); 48 return std::move(*__wrapped_func); 49 } 50 #endif // _LIBCPP_STD_VER >= 23 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 _LIBCPP_POP_MACROS 55 56 #endif // _LIBCPP___ALGORITHM_FOR_EACH_H 57