| //===----------------------------------------------------------------------===// |
| // |
| // 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___ALGORITHM_RANGES_FOR_EACH_H |
| #define _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H |
| |
| #include <__algorithm/in_fun_result.h> |
| #include <__config> |
| #include <__functional/identity.h> |
| #include <__functional/invoke.h> |
| #include <__iterator/concepts.h> |
| #include <__iterator/projected.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__ranges/dangling.h> |
| #include <__utility/move.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| |
| template <class _Iter, class _Func> |
| using for_each_result = in_fun_result<_Iter, _Func>; |
| |
| namespace __for_each { |
| struct __fn { |
| private: |
| template <class _Iter, class _Sent, class _Proj, class _Func> |
| _LIBCPP_HIDE_FROM_ABI constexpr static |
| for_each_result<_Iter, _Func> __for_each_impl(_Iter __first, _Sent __last, _Func& __func, _Proj& __proj) { |
| for (; __first != __last; ++__first) |
| std::invoke(__func, std::invoke(__proj, *__first)); |
| return {std::move(__first), std::move(__func)}; |
| } |
| |
| public: |
| template <input_iterator _Iter, sentinel_for<_Iter> _Sent, |
| class _Proj = identity, |
| indirectly_unary_invocable<projected<_Iter, _Proj>> _Func> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| for_each_result<_Iter, _Func> operator()(_Iter __first, _Sent __last, _Func __func, _Proj __proj = {}) const { |
| return __for_each_impl(std::move(__first), std::move(__last), __func, __proj); |
| } |
| |
| template <input_range _Range, |
| class _Proj = identity, |
| indirectly_unary_invocable<projected<iterator_t<_Range>, _Proj>> _Func> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| for_each_result<borrowed_iterator_t<_Range>, _Func> operator()(_Range&& __range, |
| _Func __func, |
| _Proj __proj = {}) const { |
| return __for_each_impl(ranges::begin(__range), ranges::end(__range), __func, __proj); |
| } |
| |
| }; |
| } // namespace __for_each |
| |
| inline namespace __cpo { |
| inline constexpr auto for_each = __for_each::__fn{}; |
| } // namespace __cpo |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H |