1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__ranges/data.h b/contrib/llvm-project/libcxx/include/__ranges/data.h
new file mode 100644
index 000000000000..dae30984d3f9
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__ranges/data.h
@@ -0,0 +1,86 @@
+// -*- C++ -*-
+//===------------------------ __ranges/data.h ------------------------------===//
+//
+// 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___RANGES_DATA_H
+#define _LIBCPP___RANGES_DATA_H
+
+#include <__config>
+#include <__iterator/concepts.h>
+#include <__iterator/iterator_traits.h>
+#include <__memory/pointer_traits.h>
+#include <__ranges/access.h>
+#include <__utility/forward.h>
+#include <concepts>
+#include <type_traits>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if !defined(_LIBCPP_HAS_NO_RANGES)
+
+// clang-format off
+namespace ranges {
+// [range.prim.data]
+namespace __data {
+  template <class _Tp>
+  concept __ptr_to_object = is_pointer_v<_Tp> && is_object_v<remove_pointer_t<_Tp>>;
+
+  template <class _Tp>
+  concept __member_data =
+    requires(_Tp&& __t) {
+      { _VSTD::forward<_Tp>(__t) } -> __can_borrow;
+      { __t.data() } -> __ptr_to_object;
+    };
+
+  template <class _Tp>
+  concept __ranges_begin_invocable =
+    !__member_data<_Tp> &&
+    requires(_Tp&& __t) {
+      { _VSTD::forward<_Tp>(__t) } -> __can_borrow;
+      { ranges::begin(_VSTD::forward<_Tp>(__t)) } -> contiguous_iterator;
+    };
+
+  struct __fn {
+    template <__member_data _Tp>
+      requires __can_borrow<_Tp>
+    _LIBCPP_HIDE_FROM_ABI
+    constexpr __ptr_to_object auto operator()(_Tp&& __t) const
+        noexcept(noexcept(__t.data())) {
+      return __t.data();
+    }
+
+    template<__ranges_begin_invocable _Tp>
+      requires __can_borrow<_Tp>
+    _LIBCPP_HIDE_FROM_ABI
+    constexpr __ptr_to_object auto operator()(_Tp&& __t) const
+        noexcept(noexcept(_VSTD::to_address(ranges::begin(_VSTD::forward<_Tp>(__t))))) {
+      return _VSTD::to_address(ranges::begin(_VSTD::forward<_Tp>(__t)));
+    }
+  };
+} // end namespace __data
+
+inline namespace __cpo {
+  inline constexpr const auto data = __data::__fn{};
+} // namespace __cpo
+} // namespace ranges
+
+// clang-format off
+
+#endif // !defined(_LIBCPP_HAS_NO_RANGES)
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___RANGES_DATA_H