79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H
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#define _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H
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#include <__algorithm/in_fun_result.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__iterator/concepts.h>
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#include <__iterator/projected.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/dangling.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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template <class _Iter, class _Func>
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using for_each_result = in_fun_result<_Iter, _Func>;
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namespace __for_each {
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struct __fn {
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private:
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template <class _Iter, class _Sent, class _Proj, class _Func>
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_LIBCPP_HIDE_FROM_ABI constexpr static
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for_each_result<_Iter, _Func> __for_each_impl(_Iter __first, _Sent __last, _Func& __func, _Proj& __proj) {
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for (; __first != __last; ++__first)
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std::invoke(__func, std::invoke(__proj, *__first));
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return {std::move(__first), std::move(__func)};
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}
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public:
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template <input_iterator _Iter, sentinel_for<_Iter> _Sent,
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class _Proj = identity,
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indirectly_unary_invocable<projected<_Iter, _Proj>> _Func>
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_LIBCPP_HIDE_FROM_ABI constexpr
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for_each_result<_Iter, _Func> operator()(_Iter __first, _Sent __last, _Func __func, _Proj __proj = {}) const {
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return __for_each_impl(std::move(__first), std::move(__last), __func, __proj);
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}
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template <input_range _Range,
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class _Proj = identity,
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indirectly_unary_invocable<projected<iterator_t<_Range>, _Proj>> _Func>
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_LIBCPP_HIDE_FROM_ABI constexpr
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for_each_result<borrowed_iterator_t<_Range>, _Func> operator()(_Range&& __range,
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_Func __func,
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_Proj __proj = {}) const {
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return __for_each_impl(ranges::begin(__range), ranges::end(__range), __func, __proj);
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}
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};
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} // namespace __for_each
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inline namespace __cpo {
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inline constexpr auto for_each = __for_each::__fn{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
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#endif // _LIBCPP___ALGORITHM_RANGES_FOR_EACH_H
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