Update libc++ to 8f0b2ac1 (12 Feb 2022).

Notable changes:
* use [[no_unique_address]] for field `__base_` in join_view
* remove _LIBCPP_HIDE_FROM_ABI from __threading_support functions
* remove __functional_base header which is just a set of #include directives
* remove unused include in ranges_swap_ranges.h
* do not print bools with "c" format.
* add noexcept to basic_format_context::arg constructor
* add ranges::min_element
* add ranges::in_fun_result
* add ranges::swap_ranges
* add std::vector::reference::operator=(bool) const
* replace _LIBCPP_DEBUG with _LIBCPP_DEBUG_LEVEL
* fix constexpr in __debug_less
* modernize code in compress_pair.h
* add permutable concept
* cleanup format headers
* remove _LIBCPP_ABI_UNSTABLE, we must set _LIBCPP_ABI_VERSION and _LIBCPP_ABI_NAMESPACE outselves now
* make some members private in experimental/functional
* remove std::nullptr_t emulation in C++03 mode

ref:f3c7583f32067a3dd9da42aeb15f1b01d746dc59

1 files changed, 22 insertions, 3 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/iterator b/contrib/libs/cxxsupp/libcxx/include/iterator
index 1786c4b8d41..202667809dc 100644
--- a/contrib/libs/cxxsupp/libcxx/include/iterator
+++ b/contrib/libs/cxxsupp/libcxx/include/iterator
@@ -147,6 +147,10 @@ template<class In, class Out>
 template<class I1, class I2 = I1>
   concept indirectly_swappable = see below;                // since C++20
 
+// [alg.req.permutable], concept permutable                // since C++20
+template<class I>
+  concept permutable = see below;
+
 template<class I1, class I2, class R, class P1 = identity,
          class P2 = identity>
   concept indirectly_comparable =
@@ -340,8 +344,10 @@ public:
     insert_iterator& operator++(int);  // constexpr in C++20
 };
 
-template <class Container, class Iterator>
-insert_iterator<Container> inserter(Container& x, Iterator i);  // constexpr in C++20
+template <class Container>
+insert_iterator<Container> inserter(Container& x, typename Container::iterator i);  // until C++20
+template <class Container>
+constexpr insert_iterator<Container> inserter(Container& x, ranges::iterator_t<Container> i);  // since C++20
 
 template <class Iterator>
 class move_iterator {
@@ -592,7 +598,6 @@ template <class E> constexpr const E* data(initializer_list<E> il) noexcept;
 
 #include <__config>
 #include <__debug>
-#include <__functional_base>
 #include <__iterator/access.h>
 #include <__iterator/advance.h>
 #include <__iterator/back_insert_iterator.h>
@@ -618,6 +623,7 @@ template <class E> constexpr const E* data(initializer_list<E> il) noexcept;
 #include <__iterator/next.h>
 #include <__iterator/ostream_iterator.h>
 #include <__iterator/ostreambuf_iterator.h>
+#include <__iterator/permutable.h>
 #include <__iterator/prev.h>
 #include <__iterator/projected.h>
 #include <__iterator/readable_traits.h>
@@ -636,6 +642,19 @@ template <class E> constexpr const E* data(initializer_list<E> il) noexcept;
 #include <utility>
 #include <version>
 
+// TODO: remove these headers
+#include <__functional/binary_function.h>
+#include <__functional/invoke.h>
+#include <__functional/operations.h>
+#include <__functional/reference_wrapper.h>
+#include <__functional/unary_function.h>
+#include <__functional/weak_result_type.h>
+#include <__memory/allocator_arg_t.h>
+#include <__memory/uses_allocator.h>
+#include <exception>
+#include <new>
+#include <typeinfo>
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif