Update libc++ to 24c12bfb (5 Feb 2022).

Notable changes:
* make _LIBCPP_ABI_UNSTABLE set _LIBCPP_ABI_VERSION
* replace include utility with specific includes in __utility folder
* disallow ranges:begin for array of incomplete types
* move fpos to separate header
* delete optional usage of type builtins that were never implemented
* define ranges::views namespace in its own header
* remove base class of the vector

ref:1d141d911ba017f306cca431c3b56c25d495e54e

27 files changed, 72 insertions, 30 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/access.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/access.h
index 67c6c57bd8..168e0304f5 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/access.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/access.h
@@ -20,7 +20,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
@@ -59,10 +59,17 @@ namespace __begin {
 
   struct __fn {
     template <class _Tp>
-      requires is_array_v<remove_cv_t<_Tp>>
-    [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp& __t) const noexcept
+    [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp (&__t)[]) const noexcept
+      requires (sizeof(_Tp) != 0)  // Disallow incomplete element types.
     {
-      return __t;
+      return __t + 0;
+    }
+
+    template <class _Tp, size_t _Np>
+    [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp (&__t)[_Np]) const noexcept
+      requires (sizeof(_Tp) != 0)  // Disallow incomplete element types.
+    {
+      return __t + 0;
     }
 
     template <class _Tp>
@@ -127,7 +134,7 @@ namespace __end {
   public:
     template <class _Tp, size_t _Np>
     [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp (&__t)[_Np]) const noexcept
-      requires (sizeof(*__t) != 0)  // Disallow incomplete element types.
+      requires (sizeof(_Tp) != 0)  // Disallow incomplete element types.
     {
       return __t + _Np;
     }
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/all.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/all.h
index b0a58e9bad..238ebdeaa4 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/all.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/all.h
@@ -23,7 +23,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/common_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/common_view.h
index fb8078d655..b8a32eb31f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/common_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/common_view.h
@@ -25,7 +25,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/concepts.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/concepts.h
index 0590863138..812cbbe1ec 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/concepts.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/concepts.h
@@ -27,7 +27,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/copyable_box.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/copyable_box.h
index ea5ee1ed1c..d092b7f9ba 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/copyable_box.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/copyable_box.h
@@ -19,7 +19,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/counted.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/counted.h
index 92bcf06be3..a2d839fc4d 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/counted.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/counted.h
@@ -24,7 +24,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/dangling.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/dangling.h
index b6b733a6ea..01bf60972e 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/dangling.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/dangling.h
@@ -16,7 +16,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/data.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/data.h
index f97ec80332..994a604a9f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/data.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/data.h
@@ -19,7 +19,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/drop_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/drop_view.h
index 520bde4b81..64c5674164 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/drop_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/drop_view.h
@@ -26,7 +26,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/empty.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/empty.h
index b06a81c98e..c83cdd7482 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/empty.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/empty.h
@@ -17,7 +17,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/empty_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/empty_view.h
index e0116b9337..232b0b8fad 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/empty_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/empty_view.h
@@ -15,7 +15,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_borrowed_range.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_borrowed_range.h
index f9985dfd00..da6aab9193 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_borrowed_range.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_borrowed_range.h
@@ -17,7 +17,7 @@
 #include <__config>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_view.h
index 87d53f3fcc..85f2a58473 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/enable_view.h
@@ -15,7 +15,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/iota_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/iota_view.h
index 17f6021f7d..77f02b63d5 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/iota_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/iota_view.h
@@ -34,7 +34,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/join_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/join_view.h
index cf06355cd4..1af2221336 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/join_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/join_view.h
@@ -25,7 +25,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/non_propagating_cache.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/non_propagating_cache.h
index 2d3a940871..89b5ef0746 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/non_propagating_cache.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/non_propagating_cache.h
@@ -19,7 +19,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/owning_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/owning_view.h
index 9c038cbd75..c0c6a32e12 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/owning_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/owning_view.h
@@ -23,7 +23,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/range_adaptor.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/range_adaptor.h
index d037585d26..04a0505288 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/range_adaptor.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/range_adaptor.h
@@ -20,7 +20,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/ref_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/ref_view.h
index 4d12759e61..b97de36e79 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/ref_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/ref_view.h
@@ -26,7 +26,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/reverse_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/reverse_view.h
index 27017115ac..c7f1ab8f94 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/reverse_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/reverse_view.h
@@ -28,7 +28,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/single_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/single_view.h
index c6f0746ea7..49e1aad520 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/single_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/single_view.h
@@ -19,7 +19,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/size.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/size.h
index e1aaf7eba8..a96103db9e 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/size.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/size.h
@@ -19,7 +19,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/subrange.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/subrange.h
index 6470682118..2450e230f2 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/subrange.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/subrange.h
@@ -31,7 +31,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/take_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/take_view.h
index b809188a1f..de44fc1fae 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/take_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/take_view.h
@@ -26,7 +26,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_PUSH_MACROS
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/transform_view.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/transform_view.h
index 6c859b3726..dad46536c7 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/transform_view.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/transform_view.h
@@ -36,7 +36,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/view_interface.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/view_interface.h
index 0a37323df8..eca563fe3f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/view_interface.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/view_interface.h
@@ -22,7 +22,7 @@
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/views.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/views.h
new file mode 100644
index 0000000000..8cc5ba3d2a
--- /dev/null
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/views.h
@@ -0,0 +1,35 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// 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_VIEWS
+#define _LIBCPP___RANGES_VIEWS
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+
+namespace ranges {
+
+namespace views { }
+
+} // namespace ranges
+
+namespace views = ranges::views;
+
+#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___RANGES_VIEWS