Merge pull request #11788 from ydb-platform/mergelibs-241120-1113

Library import 241120-1113

63 files changed, 1569 insertions, 1203 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/count.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/count.h
index 6c8c7fda35..23a7d3c4dc 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/count.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/count.h
@@ -10,26 +10,83 @@
 #ifndef _LIBCPP___ALGORITHM_COUNT_H
 #define _LIBCPP___ALGORITHM_COUNT_H
 
+#include <__algorithm/iterator_operations.h>
+#include <__algorithm/min.h>
+#include <__bit/invert_if.h>
+#include <__bit/popcount.h>
 #include <__config>
+#include <__functional/identity.h>
+#include <__functional/invoke.h>
+#include <__fwd/bit_reference.h>
 #include <__iterator/iterator_traits.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
 
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _InputIterator, class _Tp>
-_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    typename iterator_traits<_InputIterator>::difference_type
-    count(_InputIterator __first, _InputIterator __last, const _Tp& __value) {
-  typename iterator_traits<_InputIterator>::difference_type __r(0);
+// generic implementation
+template <class _AlgPolicy, class _Iter, class _Sent, class _Tp, class _Proj>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename _IterOps<_AlgPolicy>::template __difference_type<_Iter>
+__count(_Iter __first, _Sent __last, const _Tp& __value, _Proj& __proj) {
+  typename _IterOps<_AlgPolicy>::template __difference_type<_Iter> __r(0);
   for (; __first != __last; ++__first)
-    if (*__first == __value)
+    if (std::__invoke(__proj, *__first) == __value)
       ++__r;
   return __r;
 }
 
+// __bit_iterator implementation
+template <bool _ToCount, class _Cp, bool _IsConst>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename __bit_iterator<_Cp, _IsConst>::difference_type
+__count_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) {
+  using _It             = __bit_iterator<_Cp, _IsConst>;
+  using __storage_type  = typename _It::__storage_type;
+  using difference_type = typename _It::difference_type;
+
+  const int __bits_per_word = _It::__bits_per_word;
+  difference_type __r       = 0;
+  // do first partial word
+  if (__first.__ctz_ != 0) {
+    __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
+    __storage_type __dn    = std::min(__clz_f, __n);
+    __storage_type __m     = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
+    __r                    = std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
+    __n -= __dn;
+    ++__first.__seg_;
+  }
+  // do middle whole words
+  for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
+    __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_));
+  // do last partial word
+  if (__n > 0) {
+    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
+    __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
+  }
+  return __r;
+}
+
+template <class, class _Cp, bool _IsConst, class _Tp, class _Proj, __enable_if_t<__is_identity<_Proj>::value, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __iter_diff_t<__bit_iterator<_Cp, _IsConst> >
+__count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value, _Proj&) {
+  if (__value)
+    return std::__count_bool<true>(__first, static_cast<typename _Cp::size_type>(__last - __first));
+  return std::__count_bool<false>(__first, static_cast<typename _Cp::size_type>(__last - __first));
+}
+
+template <class _InputIterator, class _Tp>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __iter_diff_t<_InputIterator>
+count(_InputIterator __first, _InputIterator __last, const _Tp& __value) {
+  __identity __proj;
+  return std::__count<_ClassicAlgPolicy>(__first, __last, __value, __proj);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // _LIBCPP___ALGORITHM_COUNT_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/nth_element.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/nth_element.h
index dbacf58f9e..ebd1cbf761 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/nth_element.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/nth_element.h
@@ -13,6 +13,7 @@
 #include <__algorithm/comp_ref_type.h>
 #include <__algorithm/iterator_operations.h>
 #include <__algorithm/sort.h>
+#include <__assert>
 #include <__config>
 #include <__debug_utils/randomize_range.h>
 #include <__iterator/iterator_traits.h>
@@ -42,6 +43,7 @@ __nth_element_find_guard(_RandomAccessIterator& __i, _RandomAccessIterator& __j,
 
 template <class _AlgPolicy, class _Compare, class _RandomAccessIterator>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void
+// NOLINTNEXTLINE(readability-function-cognitive-complexity)
 __nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp)
 {
     using _Ops = _IterOps<_AlgPolicy>;
@@ -116,10 +118,18 @@ __nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _Rando
                     return;
                 }
                 while (true) {
-                    while (!__comp(*__first, *__i))
+                    while (!__comp(*__first, *__i)) {
                         ++__i;
-                    while (__comp(*__first, *--__j))
-                        ;
+                        _LIBCPP_ASSERT_UNCATEGORIZED(
+                            __i != __last,
+                            "Would read out of bounds, does your comparator satisfy the strict-weak ordering requirement?");
+                    }
+                    do {
+                        _LIBCPP_ASSERT_UNCATEGORIZED(
+                            __j != __first,
+                            "Would read out of bounds, does your comparator satisfy the strict-weak ordering requirement?");
+                        --__j;
+                    } while (__comp(*__first, *__j));
                     if (__i >= __j)
                         break;
                     _Ops::iter_swap(__i, __j);
@@ -146,11 +156,19 @@ __nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _Rando
             while (true)
             {
                 // __m still guards upward moving __i
-                while (__comp(*__i, *__m))
+                while (__comp(*__i, *__m)) {
                     ++__i;
+                    _LIBCPP_ASSERT_UNCATEGORIZED(
+                        __i != __last,
+                        "Would read out of bounds, does your comparator satisfy the strict-weak ordering requirement?");
+                }
                 // It is now known that a guard exists for downward moving __j
-                while (!__comp(*--__j, *__m))
-                    ;
+                do {
+                    _LIBCPP_ASSERT_UNCATEGORIZED(
+                        __j != __first,
+                        "Would read out of bounds, does your comparator satisfy the strict-weak ordering requirement?");
+                    --__j;
+                } while (!__comp(*__j, *__m));
                 if (__i >= __j)
                     break;
                 _Ops::iter_swap(__i, __j);
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_any_all_none_of.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_any_all_none_of.h
index 47d280c431..d93fdba222 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_any_all_none_of.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_any_all_none_of.h
@@ -17,7 +17,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -35,19 +35,35 @@ template <class _ExecutionPolicy,
           class _Predicate,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
-any_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool> __any_of(
+    _ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_any_of, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) {
-        return std::find_if(__policy, __g_first, __g_last, __g_pred) != __g_last;
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) -> optional<bool> {
+        auto __res = std::__find_if(__policy, __g_first, __g_last, __g_pred);
+        if (!__res)
+          return nullopt;
+        return *__res != __g_last;
       },
       std::move(__first),
       std::move(__last),
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Predicate,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
+any_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__any_of(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_all_of(); // declaration needed for the frontend dispatch below
 
@@ -56,21 +72,37 @@ template <class _ExecutionPolicy,
           class _Pred,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
-all_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool>
+__all_of(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Pred&& __pred) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_all_of, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Pred __g_pred) {
-        return !std::any_of(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __value) {
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Pred __g_pred) -> optional<bool> {
+        auto __res = std::__any_of(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __value) {
           return !__g_pred(__value);
         });
+        if (!__res)
+          return nullopt;
+        return !*__res;
       },
       std::move(__first),
       std::move(__last),
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Pred,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
+all_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__all_of(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_none_of(); // declaration needed for the frontend dispatch below
 
@@ -79,19 +111,35 @@ template <class _ExecutionPolicy,
           class _Pred,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
-none_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool>
+__none_of(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Pred&& __pred) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_none_of, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Pred __g_pred) {
-        return !std::any_of(__policy, __g_first, __g_last, __g_pred);
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Pred __g_pred) -> optional<bool> {
+        auto __res = std::__any_of(__policy, __g_first, __g_last, __g_pred);
+        if (!__res)
+          return nullopt;
+        return !*__res;
       },
       std::move(__first),
       std::move(__last),
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Pred,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
+none_of(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Pred __pred) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__none_of(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backend.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backend.h
index 3d9459ef5f..0bf2cca5ee 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backend.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backend.h
@@ -27,41 +27,38 @@ TODO: Documentation of how backends work
 A PSTL parallel backend is a tag type to which the following functions are associated, at minimum:
 
   template <class _ExecutionPolicy, class _Iterator, class _Func>
-  void __pstl_for_each(_Backend, _ExecutionPolicy&&, _Iterator __first, _Iterator __last, _Func __f);
+  optional<__empty> __pstl_for_each(_Backend, _ExecutionPolicy&&, _Iterator __first, _Iterator __last, _Func __f);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  _Iterator __pstl_find_if(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
+  optional<_Iterator> __pstl_find_if(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _RandomAccessIterator, class _Comp>
-  void __pstl_stable_sort(_Backend, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp);
+  optional<__empty>
+  __pstl_stable_sort(_Backend, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp);
 
   template <class _ExecutionPolicy,
             class _ForwardIterator1,
             class _ForwardIterator2,
             class _ForwardOutIterator,
             class _Comp>
-  _ForwardOutIterator __pstl_merge(_Backend,
-                                   _ForwardIterator1 __first1,
-                                   _ForwardIterator1 __last1,
-                                   _ForwardIterator2 __first2,
-                                   _ForwardIterator2 __last2,
-                                   _ForwardOutIterator __result,
-                                   _Comp __comp);
+  optional<_ForwardOutIterator> __pstl_merge(_Backend,
+                                             _ForwardIterator1 __first1,
+                                             _ForwardIterator1 __last1,
+                                             _ForwardIterator2 __first2,
+                                             _ForwardIterator2 __last2,
+                                             _ForwardOutIterator __result,
+                                             _Comp __comp);
 
   template <class _ExecutionPolicy, class _InIterator, class _OutIterator, class _UnaryOperation>
-  _OutIterator __pstl_transform(_Backend,
-                                _InIterator __first,
-                                _InIterator __last,
-                                _OutIterator __result,
-                                _UnaryOperation __op);
+  optional<_OutIterator>
+  __pstl_transform(_Backend, _InIterator __first, _InIterator __last, _OutIterator __result, _UnaryOperation __op);
 
   template <class _ExecutionPolicy, class _InIterator1, class _InIterator2, class _OutIterator, class _BinaryOperation>
-  _OutIterator __pstl_transform(_Backend,
-                                _InIterator1 __first1,
-                                _InIterator1 __last1,
-                                _InIterator2 __first2,
-                                _OutIterator __result,
-                                _BinaryOperation __op);
+  optional<_OutIterator> __pstl_transform(_InIterator1 __first1,
+                                          _InIterator2 __first2,
+                                          _InIterator1 __last1,
+                                          _OutIterator __result,
+                                          _BinaryOperation __op);
 
   template <class _ExecutionPolicy,
             class _Iterator1,
@@ -69,22 +66,22 @@ A PSTL parallel backend is a tag type to which the following functions are assoc
             class _Tp,
             class _BinaryOperation1,
             class _BinaryOperation2>
-  _Tp __pstl_transform_reduce(_Backend,
-                              _Iterator1 __first1,
-                              _Iterator1 __last1,
-                              _Iterator2 __first2,
-                              _Iterator2 __last2,
-                              _Tp __init,
-                              _BinaryOperation1 __reduce,
-                              _BinaryOperation2 __transform);
+  optional<_Tp> __pstl_transform_reduce(_Backend,
+                                        _Iterator1 __first1,
+                                        _Iterator1 __last1,
+                                        _Iterator2 __first2,
+                                        _Iterator2 __last2,
+                                        _Tp __init,
+                                        _BinaryOperation1 __reduce,
+                                        _BinaryOperation2 __transform);
 
   template <class _ExecutionPolicy, class _Iterator, class _Tp, class _BinaryOperation, class _UnaryOperation>
-  _Tp __pstl_transform_reduce(_Backend,
-                              _Iterator __first,
-                              _Iterator __last,
-                              _Tp __init,
-                              _BinaryOperation __reduce,
-                              _UnaryOperation __transform);
+  optional<_Tp> __pstl_transform_reduce(_Backend,
+                                        _Iterator __first,
+                                        _Iterator __last,
+                                        _Tp __init,
+                                        _BinaryOperation __reduce,
+                                        _UnaryOperation __transform);
 
 // TODO: Complete this list
 
@@ -93,86 +90,95 @@ algorithms, otherwise they are implemented in terms of other algorithms. If none
 implemented, all the algorithms will eventually forward to the basis algorithms listed above:
 
   template <class _ExecutionPolicy, class _Iterator, class _Size, class _Func>
-  void __pstl_for_each_n(_Backend, _Iterator __first, _Size __n, _Func __f);
+  optional<__empty> __pstl_for_each_n(_Backend, _Iterator __first, _Size __n, _Func __f);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  bool __pstl_any_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
+  optional<bool> __pstl_any_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  bool __pstl_all_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
+  optional<bool> __pstl_all_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  bool __pstl_none_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
+  optional<bool> __pstl_none_of(_Backend, _Iterator __first, _iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Tp>
-  _Iterator __pstl_find(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
+  optional<_Iterator> __pstl_find(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  _Iterator __pstl_find_if_not(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
+  optional<_Iterator> __pstl_find_if_not(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Tp>
-  void __pstl_fill(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
+  optional<__empty> __pstl_fill(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
 
   template <class _ExecutionPolicy, class _Iterator, class _SizeT, class _Tp>
-  void __pstl_fill_n(_Backend, _Iterator __first, _SizeT __n, const _Tp& __value);
+  optional<__empty> __pstl_fill_n(_Backend, _Iterator __first, _SizeT __n, const _Tp& __value);
 
   template <class _ExecutionPolicy, class _Iterator, class _Generator>
-  void __pstl_generate(_Backend, _Iterator __first, _Iterator __last, _Generator __gen);
+  optional<__empty> __pstl_generate(_Backend, _Iterator __first, _Iterator __last, _Generator __gen);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  void __pstl_is_partitioned(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
+  optional<__empty> __pstl_is_partitioned(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Size, class _Generator>
-  void __pstl_generator_n(_Backend, _Iterator __first, _Size __n, _Generator __gen);
+  optional<__empty> __pstl_generator_n(_Backend, _Iterator __first, _Size __n, _Generator __gen);
 
   template <class _ExecutionPolicy, class _terator1, class _Iterator2, class _OutIterator, class _Comp>
-  _OutIterator __pstl_merge(_Backend,
-                            _Iterator1 __first1,
-                            _Iterator1 __last1,
-                            _Iterator2 __first2,
-                            _Iterator2 __last2,
-                            _OutIterator __result,
-                            _Comp __comp);
+  optional<_OutIterator> __pstl_merge(_Backend,
+                                      _Iterator1 __first1,
+                                      _Iterator1 __last1,
+                                      _Iterator2 __first2,
+                                      _Iterator2 __last2,
+                                      _OutIterator __result,
+                                      _Comp __comp);
 
   template <class _ExecutionPolicy, class _Iterator, class _Tp, class _BinaryOperation>
-  _Tp __pstl_reduce(_Backend, _Iterator __first, _Iterator __last, _Tp __init, _BinaryOperation __op);
+  optional<_Tp> __pstl_reduce(_Backend, _Iterator __first, _Iterator __last, _Tp __init, _BinaryOperation __op);
 
   temlate <class _ExecutionPolicy, class _Iterator>
-  __iter_value_type<_Iterator> __pstl_reduce(_Backend, _Iterator __first, _Iterator __last);
+  optional<__iter_value_type<_Iterator>> __pstl_reduce(_Backend, _Iterator __first, _Iterator __last);
 
   template <class _ExecuitonPolicy, class _Iterator, class _Tp>
-  __iter_diff_t<_Iterator> __pstl_count(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
+  optional<__iter_diff_t<_Iterator>> __pstl_count(_Backend, _Iterator __first, _Iterator __last, const _Tp& __value);
 
   template <class _ExecutionPolicy, class _Iterator, class _Predicate>
-  __iter_diff_t<_Iterator> __pstl_count_if(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
+  optional<__iter_diff_t<_Iterator>> __pstl_count_if(_Backend, _Iterator __first, _Iterator __last, _Predicate __pred);
 
   template <class _ExecutionPolicy, class _Iterator, class _Tp>
-  void __pstl_replace(_Backend, _Iterator __first, _Iterator __last, const _Tp& __old_value, const _Tp& __new_value);
+  optional<__empty>
+  __pstl_replace(_Backend, _Iterator __first, _Iterator __last, const _Tp& __old_value, const _Tp& __new_value);
 
   template <class _ExecutionPolicy, class _Iterator, class _Pred, class _Tp>
-  void __pstl_replace_if(_Backend, _Iterator __first, _Iterator __last, _Pred __pred, const _Tp& __new_value);
+  optional<__empty>
+  __pstl_replace_if(_Backend, _Iterator __first, _Iterator __last, _Pred __pred, const _Tp& __new_value);
 
   template <class _ExecutionPolicy, class _Iterator, class _OutIterator, class _Tp>
-  void __pstl_replace_copy(_Backend,
-                           _Iterator __first,
-                           _Iterator __last,
-                           _OutIterator __result,
-                           const _Tp& __old_value,
-                           const _Tp& __new_value);
+  optional<__empty> __pstl_replace_copy(_Backend,
+                                        _Iterator __first,
+                                        _Iterator __last,
+                                        _OutIterator __result,
+                                        const _Tp& __old_value,
+                                        const _Tp& __new_value);
 
   template <class _ExecutionPolicy, class _Iterator, class _OutIterator, class _Pred, class _Tp>
-  void __pstl_replace_copy_if(_Backend,
-                              _Iterator __first,
-                              _Iterator __last,
-                              _OutIterator __result,
-                              _Pred __pred,
-                              const _Tp& __new_value);
+  optional<__empty> __pstl_replace_copy_if(_Backend,
+                                           _Iterator __first,
+                                           _Iterator __last,
+                                           _OutIterator __result,
+                                           _Pred __pred,
+                                           const _Tp& __new_value);
 
   template <class _ExecutionPolicy, class _Iterator, class _Comp>
-  void __pstl_sort(_Backend, _Iterator __first, _Iterator __last, _Comp __comp);
+  optional<__empty> __pstl_sort(_Backend, _Iterator __first, _Iterator __last, _Comp __comp);
 
 // TODO: Complete this list
 
+Exception handling
+==================
+
+PSTL backends are expected to report errors (i.e. failure to allocate) by returning a disengaged `optional` from their
+implementation. Exceptions shouldn't be used to report an internal failure-to-allocate, since all exceptions are turned
+into a program termination at the front-end level. When a backend returns a disengaged `optional` to the frontend, the
+frontend will turn that into a call to `std::__throw_bad_alloc();` to report the internal failure to the user.
 */
 
 template <class _ExecutionPolicy>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backend.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backend.h
index e54f331b94..6980ded189 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backend.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backend.h
@@ -15,10 +15,11 @@
 
   // _Functor takes a subrange for [__first, __last) that should be executed in serial
   template <class _RandomAccessIterator, class _Functor>
-  void __parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Functor __func);
+  optional<__empty> __parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Functor __func);
 
   template <class _Iterator, class _UnaryOp, class _Tp, class _BinaryOp, class _Reduction>
-  _Tp __parallel_transform_reduce(_Iterator __first, _Iterator __last, _UnaryOp, _Tp __init, _BinaryOp, _Reduction);
+  optional<_Tp>
+  __parallel_transform_reduce(_Iterator __first, _Iterator __last, _UnaryOp, _Tp __init, _BinaryOp, _Reduction);
 
   // Cancel the execution of other jobs - they aren't needed anymore
   void __cancel_execution();
@@ -28,7 +29,7 @@
             class _RandomAccessIterator3,
             class _Compare,
             class _LeafMerge>
-  void __parallel_merge(
+  optional<void> __parallel_merge(
       _RandomAccessIterator1 __first1,
       _RandomAccessIterator1 __last1,
       _RandomAccessIterator2 __first2,
@@ -44,6 +45,14 @@
                               _LeafSort __leaf_sort);
 
   TODO: Document the parallel backend
+
+Exception handling
+==================
+
+CPU backends are expected to report errors (i.e. failure to allocate) by returning a disengaged `optional` from their
+implementation. Exceptions shouldn't be used to report an internal failure-to-allocate, since all exceptions are turned
+into a program termination at the front-end level. When a backend returns a disengaged `optional` to the frontend, the
+frontend will turn that into a call to `std::__throw_bad_alloc();` to report the internal failure to the user.
 */
 
 #include <__algorithm/pstl_backends/cpu_backends/any_of.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/any_of.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/any_of.h
index c8a071af82..13dff80086 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/any_of.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/any_of.h
@@ -18,24 +18,30 @@
 #include <__functional/operations.h>
 #include <__iterator/concepts.h>
 #include <__type_traits/is_execution_policy.h>
+#include <__utility/move.h>
 #include <__utility/pair.h>
-#include <__utility/terminate_on_exception.h>
 #include <cstdint>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
+_LIBCPP_PUSH_MACROS
+#  include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Index, class _Brick>
-_LIBCPP_HIDE_FROM_ABI bool __parallel_or(_Index __first, _Index __last, _Brick __f) {
+_LIBCPP_HIDE_FROM_ABI optional<bool> __parallel_or(_Index __first, _Index __last, _Brick __f) {
   std::atomic<bool> __found(false);
-  __par_backend::__parallel_for(__first, __last, [__f, &__found](_Index __i, _Index __j) {
+  auto __ret = __par_backend::__parallel_for(__first, __last, [__f, &__found](_Index __i, _Index __j) {
     if (!__found.load(std::memory_order_relaxed) && __f(__i, __j)) {
       __found.store(true, std::memory_order_relaxed);
       __par_backend::__cancel_execution();
     }
   });
-  return __found;
+  if (!__ret)
+    return nullopt;
+  return static_cast<bool>(__found);
 }
 
 // TODO: check whether __simd_first() can be used here
@@ -64,17 +70,17 @@ _LIBCPP_HIDE_FROM_ABI bool __simd_or(_Index __first, _DifferenceType __n, _Pred
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate>
-_LIBCPP_HIDE_FROM_ABI bool
+_LIBCPP_HIDE_FROM_ABI optional<bool>
 __pstl_any_of(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    return std::__terminate_on_exception([&] {
-      return std::__parallel_or(
-          __first, __last, [&__pred](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
-            return std::__pstl_any_of<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{}, __brick_first, __brick_last, __pred);
-          });
-    });
+    return std::__parallel_or(
+        __first, __last, [&__pred](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
+          auto __res = std::__pstl_any_of<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{}, __brick_first, __brick_last, __pred);
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+          return *std::move(__res);
+        });
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
     return std::__simd_or(__first, __last - __first, __pred);
@@ -85,6 +91,8 @@ __pstl_any_of(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __la
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKEND_ANY_OF_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/fill.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/fill.h
index 8b531887c7..64babe9fd2 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/fill.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/fill.h
@@ -14,7 +14,8 @@
 #include <__config>
 #include <__iterator/concepts.h>
 #include <__type_traits/is_execution_policy.h>
-#include <__utility/terminate_on_exception.h>
+#include <__utility/empty.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -34,22 +35,23 @@ _LIBCPP_HIDE_FROM_ABI _Index __simd_fill_n(_Index __first, _DifferenceType __n,
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _Tp>
-_LIBCPP_HIDE_FROM_ABI void
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
 __pstl_fill(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    std::__terminate_on_exception([&] {
-      __par_backend::__parallel_for(
-          __first, __last, [&__value](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
-            std::__pstl_fill<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{}, __brick_first, __brick_last, __value);
-          });
-    });
+    return __par_backend::__parallel_for(
+        __first, __last, [&__value](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
+          [[maybe_unused]] auto __res = std::__pstl_fill<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{}, __brick_first, __brick_last, __value);
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+        });
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
     std::__simd_fill_n(__first, __last - __first, __value);
+    return __empty{};
   } else {
     std::fill(__first, __last, __value);
+    return __empty{};
   }
 }
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/find_if.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/find_if.h
index 91610c0408..170470e4fb 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/find_if.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/find_if.h
@@ -17,9 +17,10 @@
 #include <__iterator/concepts.h>
 #include <__iterator/iterator_traits.h>
 #include <__type_traits/is_execution_policy.h>
+#include <__utility/move.h>
 #include <__utility/pair.h>
-#include <__utility/terminate_on_exception.h>
 #include <cstddef>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -27,31 +28,37 @@
 
 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
+_LIBCPP_PUSH_MACROS
+#  include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Index, class _Brick, class _Compare>
-_LIBCPP_HIDE_FROM_ABI _Index
+_LIBCPP_HIDE_FROM_ABI optional<_Index>
 __parallel_find(_Index __first, _Index __last, _Brick __f, _Compare __comp, bool __b_first) {
   typedef typename std::iterator_traits<_Index>::difference_type _DifferenceType;
   const _DifferenceType __n      = __last - __first;
   _DifferenceType __initial_dist = __b_first ? __n : -1;
   std::atomic<_DifferenceType> __extremum(__initial_dist);
   // TODO: find out what is better here: parallel_for or parallel_reduce
-  __par_backend::__parallel_for(__first, __last, [__comp, __f, __first, &__extremum](_Index __i, _Index __j) {
-    // See "Reducing Contention Through Priority Updates", PPoPP '13, for discussion of
-    // why using a shared variable scales fairly well in this situation.
-    if (__comp(__i - __first, __extremum)) {
-      _Index __res = __f(__i, __j);
-      // If not '__last' returned then we found what we want so put this to extremum
-      if (__res != __j) {
-        const _DifferenceType __k = __res - __first;
-        for (_DifferenceType __old = __extremum; __comp(__k, __old); __old = __extremum) {
-          __extremum.compare_exchange_weak(__old, __k);
+  auto __res =
+      __par_backend::__parallel_for(__first, __last, [__comp, __f, __first, &__extremum](_Index __i, _Index __j) {
+        // See "Reducing Contention Through Priority Updates", PPoPP '13, for discussion of
+        // why using a shared variable scales fairly well in this situation.
+        if (__comp(__i - __first, __extremum)) {
+          _Index __result = __f(__i, __j);
+          // If not '__last' returned then we found what we want so put this to extremum
+          if (__result != __j) {
+            const _DifferenceType __k = __result - __first;
+            for (_DifferenceType __old = __extremum; __comp(__k, __old); __old = __extremum) {
+              __extremum.compare_exchange_weak(__old, __k);
+            }
+          }
         }
-      }
-    }
-  });
-  return __extremum != __initial_dist ? __first + __extremum : __last;
+      });
+  if (!__res)
+    return nullopt;
+  return __extremum.load() != __initial_dist ? __first + __extremum.load() : __last;
 }
 
 template <class _Index, class _DifferenceType, class _Compare>
@@ -91,21 +98,21 @@ __simd_first(_Index __first, _DifferenceType __begin, _DifferenceType __end, _Co
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _Predicate>
-_LIBCPP_HIDE_FROM_ABI _ForwardIterator
+_LIBCPP_HIDE_FROM_ABI optional<_ForwardIterator>
 __pstl_find_if(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    return std::__terminate_on_exception([&] {
-      return std::__parallel_find(
-          __first,
-          __last,
-          [&__pred](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
-            return std::__pstl_find_if<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{}, __brick_first, __brick_last, __pred);
-          },
-          less<>{},
-          true);
-    });
+    return std::__parallel_find(
+        __first,
+        __last,
+        [&__pred](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
+          auto __res = std::__pstl_find_if<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{}, __brick_first, __brick_last, __pred);
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+          return *std::move(__res);
+        },
+        less<>{},
+        true);
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
     using __diff_t = __iter_diff_t<_ForwardIterator>;
@@ -119,6 +126,8 @@ __pstl_find_if(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __l
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKENDS_FIND_IF_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/for_each.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/for_each.h
index f6f22fdd87..81fd4526b8 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/for_each.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/for_each.h
@@ -14,7 +14,8 @@
 #include <__config>
 #include <__iterator/concepts.h>
 #include <__type_traits/is_execution_policy.h>
-#include <__utility/terminate_on_exception.h>
+#include <__utility/empty.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -25,7 +26,7 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Iterator, class _DifferenceType, class _Function>
-_LIBCPP_HIDE_FROM_ABI _Iterator __simd_walk_1(_Iterator __first, _DifferenceType __n, _Function __f) noexcept {
+_LIBCPP_HIDE_FROM_ABI _Iterator __simd_walk(_Iterator __first, _DifferenceType __n, _Function __f) noexcept {
   _PSTL_PRAGMA_SIMD
   for (_DifferenceType __i = 0; __i < __n; ++__i)
     __f(__first[__i]);
@@ -34,22 +35,23 @@ _LIBCPP_HIDE_FROM_ABI _Iterator __simd_walk_1(_Iterator __first, _DifferenceType
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _Functor>
-_LIBCPP_HIDE_FROM_ABI void
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
 __pstl_for_each(__cpu_backend_tag, _ForwardIterator __first, _ForwardIterator __last, _Functor __func) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    std::__terminate_on_exception([&] {
-      std::__par_backend::__parallel_for(
-          __first, __last, [__func](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
-            std::__pstl_for_each<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{}, __brick_first, __brick_last, __func);
-          });
-    });
+    return std::__par_backend::__parallel_for(
+        __first, __last, [__func](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
+          [[maybe_unused]] auto __res = std::__pstl_for_each<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{}, __brick_first, __brick_last, __func);
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+        });
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    std::__simd_walk_1(__first, __last - __first, __func);
+    std::__simd_walk(__first, __last - __first, __func);
+    return __empty{};
   } else {
     std::for_each(__first, __last, __func);
+    return __empty{};
   }
 }
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/libdispatch.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/libdispatch.h
index 50b6e0b1d0..e885e7f225 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/libdispatch.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/libdispatch.h
@@ -23,11 +23,13 @@
 #include <__memory/construct_at.h>
 #include <__memory/unique_ptr.h>
 #include <__numeric/reduce.h>
+#include <__utility/empty.h>
+#include <__utility/exception_guard.h>
 #include <__utility/move.h>
 #include <__utility/pair.h>
-#include <__utility/terminate_on_exception.h>
 #include <cstddef>
 #include <new>
+#include <optional>
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
@@ -61,8 +63,9 @@ struct __chunk_partitions {
 [[__gnu__::__const__]] _LIBCPP_EXPORTED_FROM_ABI __chunk_partitions __partition_chunks(ptrdiff_t __size) noexcept;
 
 template <class _RandomAccessIterator, class _Functor>
-_LIBCPP_HIDE_FROM_ABI void
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
 __dispatch_parallel_for(__chunk_partitions __partitions, _RandomAccessIterator __first, _Functor __func) {
+  // Perform the chunked execution.
   __libdispatch::__dispatch_apply(__partitions.__chunk_count_, [&](size_t __chunk) {
     auto __this_chunk_size = __chunk == 0 ? __partitions.__first_chunk_size_ : __partitions.__chunk_size_;
     auto __index =
@@ -71,10 +74,12 @@ __dispatch_parallel_for(__chunk_partitions __partitions, _RandomAccessIterator _
             : (__chunk * __partitions.__chunk_size_) + (__partitions.__first_chunk_size_ - __partitions.__chunk_size_);
     __func(__first + __index, __first + __index + __this_chunk_size);
   });
+
+  return __empty{};
 }
 
 template <class _RandomAccessIterator, class _Functor>
-_LIBCPP_HIDE_FROM_ABI void
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
 __parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Functor __func) {
   return __libdispatch::__dispatch_parallel_for(
       __libdispatch::__partition_chunks(__last - __first), std::move(__first), std::move(__func));
@@ -95,23 +100,23 @@ template <typename _RandomAccessIterator1,
           typename _RandomAccessIterator3,
           typename _Compare,
           typename _LeafMerge>
-_LIBCPP_HIDE_FROM_ABI void __parallel_merge(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_merge(
     _RandomAccessIterator1 __first1,
     _RandomAccessIterator1 __last1,
     _RandomAccessIterator2 __first2,
     _RandomAccessIterator2 __last2,
     _RandomAccessIterator3 __result,
     _Compare __comp,
-    _LeafMerge __leaf_merge) {
+    _LeafMerge __leaf_merge) noexcept {
   __chunk_partitions __partitions =
       __libdispatch::__partition_chunks(std::max<ptrdiff_t>(__last1 - __first1, __last2 - __first2));
 
   if (__partitions.__chunk_count_ == 0)
-    return;
+    return __empty{};
 
   if (__partitions.__chunk_count_ == 1) {
     __leaf_merge(__first1, __last1, __first2, __last2, __result, __comp);
-    return;
+    return __empty{};
   }
 
   using __merge_range_t = __merge_range<_RandomAccessIterator1, _RandomAccessIterator2, _RandomAccessIterator3>;
@@ -122,61 +127,76 @@ _LIBCPP_HIDE_FROM_ABI void __parallel_merge(
     std::destroy_n(__ptr, __n_ranges);
     std::allocator<__merge_range_t>().deallocate(__ptr, __n_ranges);
   };
+
   unique_ptr<__merge_range_t[], decltype(__destroy)> __ranges(
-      std::allocator<__merge_range_t>().allocate(__n_ranges), __destroy);
+      [&]() -> __merge_range_t* {
+#  ifndef _LIBCPP_HAS_NO_EXCEPTIONS
+        try {
+#  endif
+          return std::allocator<__merge_range_t>().allocate(__n_ranges);
+#  ifndef _LIBCPP_HAS_NO_EXCEPTIONS
+        } catch (const std::bad_alloc&) {
+          return nullptr;
+        }
+#  endif
+      }(),
+      __destroy);
+
+  if (!__ranges)
+    return nullopt;
 
   // TODO: Improve the case where the smaller range is merged into just a few (or even one) chunks of the larger case
-  std::__terminate_on_exception([&] {
-    __merge_range_t* __r = __ranges.get();
-    std::__construct_at(__r++, __first1, __first2, __result);
-
-    bool __iterate_first_range = __last1 - __first1 > __last2 - __first2;
-
-    auto __compute_chunk = [&](size_t __chunk_size) -> __merge_range_t {
-      auto [__mid1, __mid2] = [&] {
-        if (__iterate_first_range) {
-          auto __m1 = __first1 + __chunk_size;
-          auto __m2 = std::lower_bound(__first2, __last2, __m1[-1], __comp);
-          return std::make_pair(__m1, __m2);
-        } else {
-          auto __m2 = __first2 + __chunk_size;
-          auto __m1 = std::lower_bound(__first1, __last1, __m2[-1], __comp);
-          return std::make_pair(__m1, __m2);
-        }
-      }();
+  __merge_range_t* __r = __ranges.get();
+  std::__construct_at(__r++, __first1, __first2, __result);
 
-      __result += (__mid1 - __first1) + (__mid2 - __first2);
-      __first1 = __mid1;
-      __first2 = __mid2;
-      return {std::move(__mid1), std::move(__mid2), __result};
-    };
+  bool __iterate_first_range = __last1 - __first1 > __last2 - __first2;
 
-    // handle first chunk
-    std::__construct_at(__r++, __compute_chunk(__partitions.__first_chunk_size_));
-
-    // handle 2 -> N - 1 chunks
-    for (ptrdiff_t __i = 0; __i != __partitions.__chunk_count_ - 2; ++__i)
-      std::__construct_at(__r++, __compute_chunk(__partitions.__chunk_size_));
-
-    // handle last chunk
-    std::__construct_at(__r, __last1, __last2, __result);
-
-    __libdispatch::__dispatch_apply(__partitions.__chunk_count_, [&](size_t __index) {
-      auto __first_iters = __ranges[__index];
-      auto __last_iters  = __ranges[__index + 1];
-      __leaf_merge(
-          __first_iters.__mid1_,
-          __last_iters.__mid1_,
-          __first_iters.__mid2_,
-          __last_iters.__mid2_,
-          __first_iters.__result_,
-          __comp);
-    });
+  auto __compute_chunk = [&](size_t __chunk_size) -> __merge_range_t {
+    auto [__mid1, __mid2] = [&] {
+      if (__iterate_first_range) {
+        auto __m1 = __first1 + __chunk_size;
+        auto __m2 = std::lower_bound(__first2, __last2, __m1[-1], __comp);
+        return std::make_pair(__m1, __m2);
+      } else {
+        auto __m2 = __first2 + __chunk_size;
+        auto __m1 = std::lower_bound(__first1, __last1, __m2[-1], __comp);
+        return std::make_pair(__m1, __m2);
+      }
+    }();
+
+    __result += (__mid1 - __first1) + (__mid2 - __first2);
+    __first1 = __mid1;
+    __first2 = __mid2;
+    return {std::move(__mid1), std::move(__mid2), __result};
+  };
+
+  // handle first chunk
+  std::__construct_at(__r++, __compute_chunk(__partitions.__first_chunk_size_));
+
+  // handle 2 -> N - 1 chunks
+  for (ptrdiff_t __i = 0; __i != __partitions.__chunk_count_ - 2; ++__i)
+    std::__construct_at(__r++, __compute_chunk(__partitions.__chunk_size_));
+
+  // handle last chunk
+  std::__construct_at(__r, __last1, __last2, __result);
+
+  __libdispatch::__dispatch_apply(__partitions.__chunk_count_, [&](size_t __index) {
+    auto __first_iters = __ranges[__index];
+    auto __last_iters  = __ranges[__index + 1];
+    __leaf_merge(
+        __first_iters.__mid1_,
+        __last_iters.__mid1_,
+        __first_iters.__mid2_,
+        __last_iters.__mid2_,
+        __first_iters.__result_,
+        __comp);
   });
+
+  return __empty{};
 }
 
 template <class _RandomAccessIterator, class _Transform, class _Value, class _Combiner, class _Reduction>
-_LIBCPP_HIDE_FROM_ABI _Value __parallel_transform_reduce(
+_LIBCPP_HIDE_FROM_ABI optional<_Value> __parallel_transform_reduce(
     _RandomAccessIterator __first,
     _RandomAccessIterator __last,
     _Transform __transform,
@@ -216,26 +236,26 @@ _LIBCPP_HIDE_FROM_ABI _Value __parallel_transform_reduce(
     }
   });
 
-  return std::__terminate_on_exception([&] {
-    return std::reduce(
-        std::make_move_iterator(__values.get()),
-        std::make_move_iterator(__values.get() + __partitions.__chunk_count_),
-        std::move(__init),
-        __combiner);
-  });
+  return std::reduce(
+      std::make_move_iterator(__values.get()),
+      std::make_move_iterator(__values.get() + __partitions.__chunk_count_),
+      std::move(__init),
+      __combiner);
 }
 
 template <class _RandomAccessIterator, class _Comp, class _LeafSort>
-_LIBCPP_HIDE_FROM_ABI void __parallel_stable_sort(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_stable_sort(
     _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp, _LeafSort __leaf_sort) {
   const auto __size = __last - __first;
   auto __partitions = __libdispatch::__partition_chunks(__size);
 
   if (__partitions.__chunk_count_ == 0)
-    return;
+    return __empty{};
 
-  if (__partitions.__chunk_count_ == 1)
-    return __leaf_sort(__first, __last, __comp);
+  if (__partitions.__chunk_count_ == 1) {
+    __leaf_sort(__first, __last, __comp);
+    return __empty{};
+  }
 
   using _Value = __iter_value_type<_RandomAccessIterator>;
 
@@ -247,70 +267,70 @@ _LIBCPP_HIDE_FROM_ABI void __parallel_stable_sort(
   // TODO: use __uninitialized_buffer
   unique_ptr<_Value[], decltype(__destroy)> __values(std::allocator<_Value>().allocate(__size), __destroy);
 
-  return std::__terminate_on_exception([&] {
-    // Initialize all elements to a moved-from state
-    // TODO: Don't do this - this can be done in the first merge - see https://llvm.org/PR63928
-    std::__construct_at(__values.get(), std::move(*__first));
-    for (__iter_diff_t<_RandomAccessIterator> __i = 1; __i != __size; ++__i) {
-      std::__construct_at(__values.get() + __i, std::move(__values.get()[__i - 1]));
-    }
-    *__first = std::move(__values.get()[__size - 1]);
-
-    __libdispatch::__dispatch_parallel_for(
-        __partitions,
-        __first,
-        [&__leaf_sort, &__comp](_RandomAccessIterator __chunk_first, _RandomAccessIterator __chunk_last) {
-          __leaf_sort(std::move(__chunk_first), std::move(__chunk_last), __comp);
-        });
-
-    bool __objects_are_in_buffer = false;
-    do {
-      const auto __old_chunk_size = __partitions.__chunk_size_;
-      if (__partitions.__chunk_count_ % 2 == 1) {
-        auto __inplace_merge_chunks = [&__comp, &__partitions](auto __first_chunk_begin) {
-          std::inplace_merge(
-              __first_chunk_begin,
-              __first_chunk_begin + __partitions.__first_chunk_size_,
-              __first_chunk_begin + __partitions.__first_chunk_size_ + __partitions.__chunk_size_,
-              __comp);
-        };
-        if (__objects_are_in_buffer)
-          __inplace_merge_chunks(__values.get());
-        else
-          __inplace_merge_chunks(__first);
-        __partitions.__first_chunk_size_ += 2 * __partitions.__chunk_size_;
-      } else {
-        __partitions.__first_chunk_size_ += __partitions.__chunk_size_;
-      }
-
-      __partitions.__chunk_size_ *= 2;
-      __partitions.__chunk_count_ /= 2;
-
-      auto __merge_chunks = [__partitions, __old_chunk_size, &__comp](auto __from_first, auto __to_first) {
-        __libdispatch::__dispatch_parallel_for(
-            __partitions,
-            __from_first,
-            [__old_chunk_size, &__from_first, &__to_first, &__comp](auto __chunk_first, auto __chunk_last) {
-              std::merge(std::make_move_iterator(__chunk_first),
-                         std::make_move_iterator(__chunk_last - __old_chunk_size),
-                         std::make_move_iterator(__chunk_last - __old_chunk_size),
-                         std::make_move_iterator(__chunk_last),
-                         __to_first + (__chunk_first - __from_first),
-                         __comp);
-            });
+  // Initialize all elements to a moved-from state
+  // TODO: Don't do this - this can be done in the first merge - see https://llvm.org/PR63928
+  std::__construct_at(__values.get(), std::move(*__first));
+  for (__iter_diff_t<_RandomAccessIterator> __i = 1; __i != __size; ++__i) {
+    std::__construct_at(__values.get() + __i, std::move(__values.get()[__i - 1]));
+  }
+  *__first = std::move(__values.get()[__size - 1]);
+
+  __libdispatch::__dispatch_parallel_for(
+      __partitions,
+      __first,
+      [&__leaf_sort, &__comp](_RandomAccessIterator __chunk_first, _RandomAccessIterator __chunk_last) {
+        __leaf_sort(std::move(__chunk_first), std::move(__chunk_last), __comp);
+      });
+
+  bool __objects_are_in_buffer = false;
+  do {
+    const auto __old_chunk_size = __partitions.__chunk_size_;
+    if (__partitions.__chunk_count_ % 2 == 1) {
+      auto __inplace_merge_chunks = [&__comp, &__partitions](auto __first_chunk_begin) {
+        std::inplace_merge(
+            __first_chunk_begin,
+            __first_chunk_begin + __partitions.__first_chunk_size_,
+            __first_chunk_begin + __partitions.__first_chunk_size_ + __partitions.__chunk_size_,
+            __comp);
       };
-
       if (__objects_are_in_buffer)
-        __merge_chunks(__values.get(), __first);
+        __inplace_merge_chunks(__values.get());
       else
-        __merge_chunks(__first, __values.get());
-      __objects_are_in_buffer = !__objects_are_in_buffer;
-    } while (__partitions.__chunk_count_ > 1);
-
-    if (__objects_are_in_buffer) {
-      std::move(__values.get(), __values.get() + __size, __first);
+        __inplace_merge_chunks(__first);
+      __partitions.__first_chunk_size_ += 2 * __partitions.__chunk_size_;
+    } else {
+      __partitions.__first_chunk_size_ += __partitions.__chunk_size_;
     }
-  });
+
+    __partitions.__chunk_size_ *= 2;
+    __partitions.__chunk_count_ /= 2;
+
+    auto __merge_chunks = [__partitions, __old_chunk_size, &__comp](auto __from_first, auto __to_first) {
+      __libdispatch::__dispatch_parallel_for(
+          __partitions,
+          __from_first,
+          [__old_chunk_size, &__from_first, &__to_first, &__comp](auto __chunk_first, auto __chunk_last) {
+            std::merge(std::make_move_iterator(__chunk_first),
+                       std::make_move_iterator(__chunk_last - __old_chunk_size),
+                       std::make_move_iterator(__chunk_last - __old_chunk_size),
+                       std::make_move_iterator(__chunk_last),
+                       __to_first + (__chunk_first - __from_first),
+                       __comp);
+          });
+    };
+
+    if (__objects_are_in_buffer)
+      __merge_chunks(__values.get(), __first);
+    else
+      __merge_chunks(__first, __values.get());
+    __objects_are_in_buffer = !__objects_are_in_buffer;
+  } while (__partitions.__chunk_count_ > 1);
+
+  if (__objects_are_in_buffer) {
+    std::move(__values.get(), __values.get() + __size, __first);
+  }
+
+  return __empty{};
 }
 
 _LIBCPP_HIDE_FROM_ABI inline void __cancel_execution() {}
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/merge.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/merge.h
index c4b28e9502..b0db70f58b 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/merge.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/merge.h
@@ -15,7 +15,7 @@
 #include <__iterator/concepts.h>
 #include <__type_traits/is_execution_policy.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -23,6 +23,9 @@
 
 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
+_LIBCPP_PUSH_MACROS
+#  include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _ExecutionPolicy,
@@ -30,7 +33,7 @@ template <class _ExecutionPolicy,
           class _ForwardIterator2,
           class _ForwardOutIterator,
           class _Comp>
-_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_merge(
+_LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> __pstl_merge(
     __cpu_backend_tag,
     _ForwardIterator1 __first1,
     _ForwardIterator1 __last1,
@@ -42,31 +45,32 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_merge(
                 __has_random_access_iterator_category_or_concept<_ForwardIterator1>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator2>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardOutIterator>::value) {
-    return std::__terminate_on_exception([&] {
-      __par_backend::__parallel_merge(
-          __first1,
-          __last1,
-          __first2,
-          __last2,
-          __result,
-          __comp,
-          [](_ForwardIterator1 __g_first1,
-             _ForwardIterator1 __g_last1,
-             _ForwardIterator2 __g_first2,
-             _ForwardIterator2 __g_last2,
-             _ForwardOutIterator __g_result,
-             _Comp __g_comp) {
-            return std::__pstl_merge<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{},
-                std::move(__g_first1),
-                std::move(__g_last1),
-                std::move(__g_first2),
-                std::move(__g_last2),
-                std::move(__g_result),
-                std::move(__g_comp));
-          });
-      return __result + (__last1 - __first1) + (__last2 - __first2);
-    });
+    auto __res = __par_backend::__parallel_merge(
+        __first1,
+        __last1,
+        __first2,
+        __last2,
+        __result,
+        __comp,
+        [](_ForwardIterator1 __g_first1,
+           _ForwardIterator1 __g_last1,
+           _ForwardIterator2 __g_first2,
+           _ForwardIterator2 __g_last2,
+           _ForwardOutIterator __g_result,
+           _Comp __g_comp) {
+          [[maybe_unused]] auto __g_res = std::__pstl_merge<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{},
+              std::move(__g_first1),
+              std::move(__g_last1),
+              std::move(__g_first2),
+              std::move(__g_last2),
+              std::move(__g_result),
+              std::move(__g_comp));
+          _LIBCPP_ASSERT_INTERNAL(__g_res, "unsed/sed should never try to allocate!");
+        });
+    if (!__res)
+      return nullopt;
+    return __result + (__last1 - __first1) + (__last2 - __first2);
   } else {
     return std::merge(__first1, __last1, __first2, __last2, __result, __comp);
   }
@@ -74,6 +78,8 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_merge(
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKENDS_MERGE_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/serial.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/serial.h
index f151c3b098..afcc7ffb26 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/serial.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/serial.h
@@ -11,8 +11,10 @@
 #define _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKENDS_SERIAL_H
 
 #include <__config>
+#include <__utility/empty.h>
 #include <__utility/move.h>
 #include <cstddef>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -20,26 +22,32 @@
 
 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
+_LIBCPP_PUSH_MACROS
+#  include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 namespace __par_backend {
 inline namespace __serial_cpu_backend {
 
 template <class _RandomAccessIterator, class _Fp>
-_LIBCPP_HIDE_FROM_ABI void __parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Fp __f) {
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
+__parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Fp __f) {
   __f(__first, __last);
+  return __empty{};
 }
 
 template <class _Index, class _UnaryOp, class _Tp, class _BinaryOp, class _Reduce>
-_LIBCPP_HIDE_FROM_ABI _Tp
+_LIBCPP_HIDE_FROM_ABI optional<_Tp>
 __parallel_transform_reduce(_Index __first, _Index __last, _UnaryOp, _Tp __init, _BinaryOp, _Reduce __reduce) {
   return __reduce(std::move(__first), std::move(__last), std::move(__init));
 }
 
 template <class _RandomAccessIterator, class _Compare, class _LeafSort>
-_LIBCPP_HIDE_FROM_ABI void __parallel_stable_sort(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_stable_sort(
     _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, _LeafSort __leaf_sort) {
   __leaf_sort(__first, __last, __comp);
+  return __empty{};
 }
 
 _LIBCPP_HIDE_FROM_ABI inline void __cancel_execution() {}
@@ -49,7 +57,7 @@ template <class _RandomAccessIterator1,
           class _RandomAccessIterator3,
           class _Compare,
           class _LeafMerge>
-_LIBCPP_HIDE_FROM_ABI void __parallel_merge(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_merge(
     _RandomAccessIterator1 __first1,
     _RandomAccessIterator1 __last1,
     _RandomAccessIterator2 __first2,
@@ -58,6 +66,7 @@ _LIBCPP_HIDE_FROM_ABI void __parallel_merge(
     _Compare __comp,
     _LeafMerge __leaf_merge) {
   __leaf_merge(__first1, __last1, __first2, __last2, __outit, __comp);
+  return __empty{};
 }
 
 // TODO: Complete this list
@@ -67,6 +76,8 @@ _LIBCPP_HIDE_FROM_ABI void __parallel_merge(
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && && _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKENDS_SERIAL_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/stable_sort.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/stable_sort.h
index 0a701443b3..34c423586c 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/stable_sort.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/stable_sort.h
@@ -13,7 +13,8 @@
 #include <__algorithm/stable_sort.h>
 #include <__config>
 #include <__type_traits/is_execution_policy.h>
-#include <__utility/terminate_on_exception.h>
+#include <__utility/empty.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -24,17 +25,16 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _ExecutionPolicy, class _RandomAccessIterator, class _Comp>
-_LIBCPP_HIDE_FROM_ABI void
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
 __pstl_stable_sort(__cpu_backend_tag, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy>) {
-    std::__terminate_on_exception([&] {
-      __par_backend::__parallel_stable_sort(
-          __first, __last, __comp, [](_RandomAccessIterator __g_first, _RandomAccessIterator __g_last, _Comp __g_comp) {
-            std::stable_sort(__g_first, __g_last, __g_comp);
-          });
-    });
+    return __par_backend::__parallel_stable_sort(
+        __first, __last, __comp, [](_RandomAccessIterator __g_first, _RandomAccessIterator __g_last, _Comp __g_comp) {
+          std::stable_sort(__g_first, __g_last, __g_comp);
+        });
   } else {
     std::stable_sort(__first, __last, __comp);
+    return __empty{};
   }
 }
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/thread.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/thread.h
index 30eb0ae362..eb11a961b7 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/thread.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/thread.h
@@ -11,8 +11,10 @@
 
 #include <__assert>
 #include <__config>
+#include <__utility/empty.h>
 #include <__utility/move.h>
 #include <cstddef>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -32,20 +34,23 @@ namespace __par_backend {
 inline namespace __thread_cpu_backend {
 
 template <class _RandomAccessIterator, class _Fp>
-_LIBCPP_HIDE_FROM_ABI void __parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Fp __f) {
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
+__parallel_for(_RandomAccessIterator __first, _RandomAccessIterator __last, _Fp __f) {
   __f(__first, __last);
+  return __empty{};
 }
 
 template <class _Index, class _UnaryOp, class _Tp, class _BinaryOp, class _Reduce>
-_LIBCPP_HIDE_FROM_ABI _Tp
+_LIBCPP_HIDE_FROM_ABI optional<_Tp>
 __parallel_transform_reduce(_Index __first, _Index __last, _UnaryOp, _Tp __init, _BinaryOp, _Reduce __reduce) {
   return __reduce(std::move(__first), std::move(__last), std::move(__init));
 }
 
 template <class _RandomAccessIterator, class _Compare, class _LeafSort>
-_LIBCPP_HIDE_FROM_ABI void __parallel_stable_sort(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_stable_sort(
     _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, _LeafSort __leaf_sort) {
   __leaf_sort(__first, __last, __comp);
+  return __empty{};
 }
 
 _LIBCPP_HIDE_FROM_ABI inline void __cancel_execution() {}
@@ -55,7 +60,7 @@ template <class _RandomAccessIterator1,
           class _RandomAccessIterator3,
           class _Compare,
           class _LeafMerge>
-_LIBCPP_HIDE_FROM_ABI void __parallel_merge(
+_LIBCPP_HIDE_FROM_ABI optional<__empty> __parallel_merge(
     _RandomAccessIterator1 __first1,
     _RandomAccessIterator1 __last1,
     _RandomAccessIterator2 __first2,
@@ -64,6 +69,7 @@ _LIBCPP_HIDE_FROM_ABI void __parallel_merge(
     _Compare __comp,
     _LeafMerge __leaf_merge) {
   __leaf_merge(__first1, __last1, __first2, __last2, __outit, __comp);
+  return __empty{};
 }
 
 } // namespace __thread_cpu_backend
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform.h
index 0259d8a84b..fdf1a2e78d 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform.h
@@ -17,7 +17,7 @@
 #include <__type_traits/enable_if.h>
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -25,11 +25,14 @@
 
 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
+_LIBCPP_PUSH_MACROS
+#  include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Iterator1, class _DifferenceType, class _Iterator2, class _Function>
 _LIBCPP_HIDE_FROM_ABI _Iterator2
-__simd_walk_2(_Iterator1 __first1, _DifferenceType __n, _Iterator2 __first2, _Function __f) noexcept {
+__simd_walk(_Iterator1 __first1, _DifferenceType __n, _Iterator2 __first2, _Function __f) noexcept {
   _PSTL_PRAGMA_SIMD
   for (_DifferenceType __i = 0; __i < __n; ++__i)
     __f(__first1[__i], __first2[__i]);
@@ -37,7 +40,7 @@ __simd_walk_2(_Iterator1 __first1, _DifferenceType __n, _Iterator2 __first2, _Fu
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _ForwardOutIterator, class _UnaryOperation>
-_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
+_LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> __pstl_transform(
     __cpu_backend_tag,
     _ForwardIterator __first,
     _ForwardIterator __last,
@@ -46,18 +49,18 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardOutIterator>::value) {
-    std::__terminate_on_exception([&] {
-      std::__par_backend::__parallel_for(
-          __first, __last, [__op, __first, __result](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
-            return std::__pstl_transform<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{}, __brick_first, __brick_last, __result + (__brick_first - __first), __op);
-          });
-    });
+    std::__par_backend::__parallel_for(
+        __first, __last, [__op, __first, __result](_ForwardIterator __brick_first, _ForwardIterator __brick_last) {
+          auto __res = std::__pstl_transform<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{}, __brick_first, __brick_last, __result + (__brick_first - __first), __op);
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+          return *std::move(__res);
+        });
     return __result + (__last - __first);
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value &&
                        __has_random_access_iterator_category_or_concept<_ForwardOutIterator>::value) {
-    return std::__simd_walk_2(
+    return std::__simd_walk(
         __first,
         __last - __first,
         __result,
@@ -70,7 +73,7 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
 }
 
 template <class _Iterator1, class _DifferenceType, class _Iterator2, class _Iterator3, class _Function>
-_LIBCPP_HIDE_FROM_ABI _Iterator3 __simd_walk_3(
+_LIBCPP_HIDE_FROM_ABI _Iterator3 __simd_walk(
     _Iterator1 __first1, _DifferenceType __n, _Iterator2 __first2, _Iterator3 __first3, _Function __f) noexcept {
   _PSTL_PRAGMA_SIMD
   for (_DifferenceType __i = 0; __i < __n; ++__i)
@@ -83,7 +86,7 @@ template <class _ExecutionPolicy,
           class _ForwardOutIterator,
           class _BinaryOperation,
           enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
+_LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> __pstl_transform(
     __cpu_backend_tag,
     _ForwardIterator1 __first1,
     _ForwardIterator1 __last1,
@@ -94,26 +97,26 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
                 __has_random_access_iterator_category_or_concept<_ForwardIterator1>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator2>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardOutIterator>::value) {
-    std::__terminate_on_exception([&] {
-      std::__par_backend::__parallel_for(
-          __first1,
-          __last1,
-          [__op, __first1, __first2, __result](_ForwardIterator1 __brick_first, _ForwardIterator1 __brick_last) {
-            return std::__pstl_transform<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{},
-                __brick_first,
-                __brick_last,
-                __first2 + (__brick_first - __first1),
-                __result + (__brick_first - __first1),
-                __op);
-          });
-    });
+    auto __res = std::__par_backend::__parallel_for(
+        __first1,
+        __last1,
+        [__op, __first1, __first2, __result](_ForwardIterator1 __brick_first, _ForwardIterator1 __brick_last) {
+          return std::__pstl_transform<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{},
+              __brick_first,
+              __brick_last,
+              __first2 + (__brick_first - __first1),
+              __result + (__brick_first - __first1),
+              __op);
+        });
+    if (!__res)
+      return nullopt;
     return __result + (__last1 - __first1);
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator1>::value &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator2>::value &&
                        __has_random_access_iterator_category_or_concept<_ForwardOutIterator>::value) {
-    return std::__simd_walk_3(
+    return std::__simd_walk(
         __first1,
         __last1 - __first1,
         __first2,
@@ -128,6 +131,8 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator __pstl_transform(
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
 
 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKENDS_TRANSFORM_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform_reduce.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform_reduce.h
index 2afe5c7d10..a5ca9c89d1 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform_reduce.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_backends/cpu_backends/transform_reduce.h
@@ -18,8 +18,8 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/operation_traits.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
 #include <new>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -98,7 +98,7 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _BinaryOperation1,
           class _BinaryOperation2>
-_LIBCPP_HIDE_FROM_ABI _Tp __pstl_transform_reduce(
+_LIBCPP_HIDE_FROM_ABI optional<_Tp> __pstl_transform_reduce(
     __cpu_backend_tag,
     _ForwardIterator1 __first1,
     _ForwardIterator1 __last1,
@@ -109,27 +109,25 @@ _LIBCPP_HIDE_FROM_ABI _Tp __pstl_transform_reduce(
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator1>::value &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator2>::value) {
-    return std::__terminate_on_exception([&] {
-      return __par_backend::__parallel_transform_reduce(
-          __first1,
-          std::move(__last1),
-          [__first1, __first2, __transform](_ForwardIterator1 __iter) {
-            return __transform(*__iter, *(__first2 + (__iter - __first1)));
-          },
-          std::move(__init),
-          std::move(__reduce),
-          [__first1, __first2, __reduce, __transform](
-              _ForwardIterator1 __brick_first, _ForwardIterator1 __brick_last, _Tp __brick_init) {
-            return std::__pstl_transform_reduce<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{},
-                __brick_first,
-                std::move(__brick_last),
-                __first2 + (__brick_first - __first1),
-                std::move(__brick_init),
-                std::move(__reduce),
-                std::move(__transform));
-          });
-    });
+    return __par_backend::__parallel_transform_reduce(
+        __first1,
+        std::move(__last1),
+        [__first1, __first2, __transform](_ForwardIterator1 __iter) {
+          return __transform(*__iter, *(__first2 + (__iter - __first1)));
+        },
+        std::move(__init),
+        std::move(__reduce),
+        [__first1, __first2, __reduce, __transform](
+            _ForwardIterator1 __brick_first, _ForwardIterator1 __brick_last, _Tp __brick_init) {
+          return *std::__pstl_transform_reduce<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{},
+              __brick_first,
+              std::move(__brick_last),
+              __first2 + (__brick_first - __first1),
+              std::move(__brick_init),
+              std::move(__reduce),
+              std::move(__transform));
+        });
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator1>::value &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator2>::value) {
@@ -149,7 +147,7 @@ _LIBCPP_HIDE_FROM_ABI _Tp __pstl_transform_reduce(
 }
 
 template <class _ExecutionPolicy, class _ForwardIterator, class _Tp, class _BinaryOperation, class _UnaryOperation>
-_LIBCPP_HIDE_FROM_ABI _Tp __pstl_transform_reduce(
+_LIBCPP_HIDE_FROM_ABI optional<_Tp> __pstl_transform_reduce(
     __cpu_backend_tag,
     _ForwardIterator __first,
     _ForwardIterator __last,
@@ -158,23 +156,23 @@ _LIBCPP_HIDE_FROM_ABI _Tp __pstl_transform_reduce(
     _UnaryOperation __transform) {
   if constexpr (__is_parallel_execution_policy_v<_ExecutionPolicy> &&
                 __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
-    return std::__terminate_on_exception([&] {
-      return __par_backend::__parallel_transform_reduce(
-          std::move(__first),
-          std::move(__last),
-          [__transform](_ForwardIterator __iter) { return __transform(*__iter); },
-          std::move(__init),
-          __reduce,
-          [__transform, __reduce](auto __brick_first, auto __brick_last, _Tp __brick_init) {
-            return std::__pstl_transform_reduce<__remove_parallel_policy_t<_ExecutionPolicy>>(
-                __cpu_backend_tag{},
-                std::move(__brick_first),
-                std::move(__brick_last),
-                std::move(__brick_init),
-                std::move(__reduce),
-                std::move(__transform));
-          });
-    });
+    return __par_backend::__parallel_transform_reduce(
+        std::move(__first),
+        std::move(__last),
+        [__transform](_ForwardIterator __iter) { return __transform(*__iter); },
+        std::move(__init),
+        __reduce,
+        [__transform, __reduce](auto __brick_first, auto __brick_last, _Tp __brick_init) {
+          auto __res = std::__pstl_transform_reduce<__remove_parallel_policy_t<_ExecutionPolicy>>(
+              __cpu_backend_tag{},
+              std::move(__brick_first),
+              std::move(__brick_last),
+              std::move(__brick_init),
+              std::move(__reduce),
+              std::move(__transform));
+          _LIBCPP_ASSERT_INTERNAL(__res, "unseq/seq should never try to allocate!");
+          return *std::move(__res);
+        });
   } else if constexpr (__is_unsequenced_execution_policy_v<_ExecutionPolicy> &&
                        __has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
     return std::__simd_transform_reduce(
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_copy.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_copy.h
index e4a6e5a54e..19f275a0d5 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_copy.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_copy.h
@@ -22,6 +22,7 @@
 #include <__type_traits/is_trivially_copyable.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -41,18 +42,34 @@ template <class _ExecutionPolicy,
           class _ForwardOutIterator,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
-copy(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _ForwardOutIterator __result) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator>
+__copy(_ExecutionPolicy&& __policy,
+       _ForwardIterator&& __first,
+       _ForwardIterator&& __last,
+       _ForwardOutIterator&& __result) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _ForwardOutIterator __g_result) {
-        return std::transform(__policy, __g_first, __g_last, __g_result, __identity());
+        return std::__transform(__policy, __g_first, __g_last, __g_result, __identity());
       },
       std::move(__first),
       std::move(__last),
       std::move(__result));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _ForwardOutIterator,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
+copy(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _ForwardOutIterator __result) {
+  auto __res = std::__copy(__policy, std::move(__first), std::move(__last), std::move(__result));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_copy_n();
 
@@ -62,21 +79,36 @@ template <class _ExecutionPolicy,
           class _Size,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
-copy_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _ForwardOutIterator __result) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> __copy_n(
+    _ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __n, _ForwardOutIterator&& __result) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy_n, _RawPolicy),
-      [&__policy](_ForwardIterator __g_first, _Size __g_n, _ForwardOutIterator __g_result) {
+      [&__policy](
+          _ForwardIterator __g_first, _Size __g_n, _ForwardOutIterator __g_result) -> optional<_ForwardIterator> {
         if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value)
-          return std::copy(__policy, __g_first, __g_first + __g_n, __g_result);
+          return std::__copy(__policy, std::move(__g_first), std::move(__g_first + __g_n), std::move(__g_result));
         else
           return std::copy_n(__g_first, __g_n, __g_result);
       },
       std::move(__first),
-      __n,
+      std::move(__n),
       std::move(__result));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _ForwardOutIterator,
+          class _Size,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
+copy_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _ForwardOutIterator __result) {
+  auto __res = std::__copy_n(__policy, std::move(__first), std::move(__n), std::move(__result));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_count.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_count.h
index cc1e824570..28806fca06 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_count.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_count.h
@@ -23,7 +23,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -41,13 +41,13 @@ template <class _ExecutionPolicy,
           class _Predicate,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI __iter_diff_t<_ForwardIterator>
-count_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__iter_diff_t<_ForwardIterator>> __count_if(
+    _ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) noexcept {
   using __diff_t = __iter_diff_t<_ForwardIterator>;
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_count_if, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) {
-        return std::transform_reduce(
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) -> optional<__diff_t> {
+        return std::__transform_reduce(
             __policy,
             std::move(__g_first),
             std::move(__g_last),
@@ -60,6 +60,19 @@ count_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Predicate,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI __iter_diff_t<_ForwardIterator>
+count_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+  auto __res = std::__count_if(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_count(); // declaration needed for the frontend dispatch below
 
@@ -68,11 +81,12 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI __iter_diff_t<_ForwardIterator>
-count(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__iter_diff_t<_ForwardIterator>>
+__count(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_count, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) {
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value)
+          -> optional<__iter_diff_t<_ForwardIterator>> {
         return std::count_if(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __v) {
           return __v == __g_value;
         });
@@ -82,6 +96,19 @@ count(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __
       __value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI __iter_diff_t<_ForwardIterator>
+count(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+  auto __res = std::__count(__policy, std::move(__first), std::move(__last), __value);
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *__res;
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_fill.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_fill.h
index fc817b5c9e..3057dcc04f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_fill.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_fill.h
@@ -20,7 +20,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -38,13 +38,13 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-fill(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+_LIBCPP_HIDE_FROM_ABI optional<__empty>
+__fill(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) noexcept {
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
-  std::__pstl_frontend_dispatch(
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_fill, _RawPolicy),
       [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) {
-        std::for_each(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) {
+        return std::__for_each(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) {
           __element = __g_value;
         });
       },
@@ -53,6 +53,18 @@ fill(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __l
       __value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+fill(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  if (!std::__fill(__policy, std::move(__first), std::move(__last), __value))
+    std::__throw_bad_alloc();
+}
+
 template <class>
 void __pstl_fill_n(); // declaration needed for the frontend dispatch below
 
@@ -62,22 +74,36 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-fill_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _SizeT __n, const _Tp& __value) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__fill_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _SizeT&& __n, const _Tp& __value) noexcept {
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
-  std::__pstl_frontend_dispatch(
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_fill_n, _RawPolicy),
       [&](_ForwardIterator __g_first, _SizeT __g_n, const _Tp& __g_value) {
         if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value)
           std::fill(__policy, __g_first, __g_first + __g_n, __g_value);
         else
           std::fill_n(__g_first, __g_n, __g_value);
+        return optional<__empty>{__empty{}};
       },
       std::move(__first),
-      __n,
+      std::move(__n),
       __value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _SizeT,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+fill_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _SizeT __n, const _Tp& __value) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  if (!std::__fill_n(__policy, std::move(__first), std::move(__n), __value))
+    std::__throw_bad_alloc();
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_find.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_find.h
index c2894d0875..adc05ea1a9 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_find.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_find.h
@@ -19,7 +19,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -34,13 +34,26 @@ template <class _ExecutionPolicy,
           class _Predicate,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardIterator
-find_if(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardIterator>>
+__find_if(_ExecutionPolicy&&, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) noexcept {
   using _Backend = typename __select_backend<_RawPolicy>::type;
   return std::__pstl_find_if<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Predicate,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _ForwardIterator
+find_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__find_if(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_find_if_not();
 
@@ -49,21 +62,36 @@ template <class _ExecutionPolicy,
           class _Predicate,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardIterator
-find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardIterator>>
+__find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find_if_not, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) {
-        return std::find_if(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __value) {
-          return !__g_pred(__value);
-        });
+      [&](_ForwardIterator&& __g_first, _ForwardIterator&& __g_last, _Predicate&& __g_pred)
+          -> optional<__remove_cvref_t<_ForwardIterator>> {
+        return std::__find_if(
+            __policy, __g_first, __g_last, [&](__iter_reference<__remove_cvref_t<_ForwardIterator>> __value) {
+              return !__g_pred(__value);
+            });
       },
       std::move(__first),
       std::move(__last),
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Predicate,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _ForwardIterator
+find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__find_if_not(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 template <class>
 void __pstl_find();
 
@@ -72,21 +100,35 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _ForwardIterator
-find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardIterator>>
+__find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find, _RawPolicy),
-      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) {
-        return std::find_if(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) {
-          return __element == __g_value;
-        });
+      [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) -> optional<_ForwardIterator> {
+        return std::find_if(
+            __policy, __g_first, __g_last, [&](__iter_reference<__remove_cvref_t<_ForwardIterator>> __element) {
+              return __element == __g_value;
+            });
       },
       std::move(__first),
       std::move(__last),
       __value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _ForwardIterator
+find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__find(__policy, std::move(__first), std::move(__last), __value);
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_for_each.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_for_each.h
index 6e6c73d19f..819a43d685 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_for_each.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_for_each.h
@@ -20,8 +20,9 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__type_traits/void_t.h>
+#include <__utility/empty.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -36,11 +37,22 @@ template <class _ExecutionPolicy,
           class _Function,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__for_each(_ExecutionPolicy&&, _ForwardIterator&& __first, _ForwardIterator&& __last, _Function&& __func) noexcept {
+  using _Backend = typename __select_backend<_RawPolicy>::type;
+  return std::__pstl_for_each<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__func));
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Function,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI void
-for_each(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Function __func) {
+for_each(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Function __func) {
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
-  using _Backend = typename __select_backend<_RawPolicy>::type;
-  std::__pstl_for_each<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__func));
+  if (!std::__for_each(__policy, std::move(__first), std::move(__last), std::move(__func)))
+    std::__throw_bad_alloc();
 }
 
 template <class>
@@ -52,23 +64,38 @@ template <class _ExecutionPolicy,
           class _Function,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __size, _Function __func) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __size, _Function&& __func) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_for_each_n, _RawPolicy),
-      [&](_ForwardIterator __g_first, _Size __g_size, _Function __g_func) {
+      [&](_ForwardIterator __g_first, _Size __g_size, _Function __g_func) -> optional<__empty> {
         if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value) {
           std::for_each(__policy, std::move(__g_first), __g_first + __g_size, std::move(__g_func));
+          return __empty{};
         } else {
           std::for_each_n(std::move(__g_first), __g_size, std::move(__g_func));
+          return __empty{};
         }
       },
-      __first,
-      __size,
+      std::move(__first),
+      std::move(__size),
       std::move(__func));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Size,
+          class _Function,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __size, _Function __func) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  auto __res = std::__for_each_n(__policy, std::move(__first), std::move(__size), std::move(__func));
+  if (!__res)
+    std::__throw_bad_alloc();
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_generate.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_generate.h
index 9a70e2e26b..56538392d5 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_generate.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_generate.h
@@ -19,6 +19,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -36,13 +37,13 @@ template <class _ExecutionPolicy,
           class _Generator,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-generate(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Generator __gen) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__generate(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Generator&& __gen) {
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
-  std::__pstl_frontend_dispatch(
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Generator __g_gen) {
-        std::for_each(
+        return std::__for_each(
             __policy, std::move(__g_first), std::move(__g_last), [&](__iter_reference<_ForwardIterator> __element) {
               __element = __g_gen();
             });
@@ -52,6 +53,18 @@ generate(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator
       std::move(__gen));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Generator,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+generate(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Generator __gen) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  if (!std::__generate(__policy, std::move(__first), std::move(__last), std::move(__gen)))
+    std::__throw_bad_alloc();
+}
+
 template <class>
 void __pstl_generate_n();
 
@@ -61,21 +74,34 @@ template <class _ExecutionPolicy,
           class _Generator,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-generate_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _Generator __gen) {
-  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
-  std::__pstl_frontend_dispatch(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__generate_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __n, _Generator&& __gen) {
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate_n, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _Size __g_n, _Generator __g_gen) {
-        std::for_each_n(__policy, std::move(__g_first), __g_n, [&](__iter_reference<_ForwardIterator> __element) {
-          __element = __g_gen();
-        });
+        return std::__for_each_n(
+            __policy, std::move(__g_first), std::move(__g_n), [&](__iter_reference<_ForwardIterator> __element) {
+              __element = __g_gen();
+            });
       },
       std::move(__first),
       __n,
       std::move(__gen));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Size,
+          class _Generator,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+generate_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _Generator __gen) {
+  _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
+  if (!std::__generate_n(__policy, std::move(__first), std::move(__n), std::move(__gen)))
+    std::__throw_bad_alloc();
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_is_partitioned.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_is_partitioned.h
index 1492ce2127..39cf636933 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_is_partitioned.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_is_partitioned.h
@@ -18,6 +18,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -35,8 +36,8 @@ template <class _ExecutionPolicy,
           class _Predicate,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
-is_partitioned(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool> __is_partitioned(
+    _ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_is_partitioned, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) {
@@ -51,6 +52,19 @@ is_partitioned(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIt
       std::move(__pred));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Predicate,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI bool
+is_partitioned(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
+  auto __res = std::__is_partitioned(__policy, std::move(__first), std::move(__last), std::move(__pred));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_merge.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_merge.h
index f10ac76742..ed80145108 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_merge.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_merge.h
@@ -16,6 +16,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -32,23 +33,51 @@ template <class _ExecutionPolicy,
           class _Comp                                         = std::less<>,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator>
+__merge(_ExecutionPolicy&&,
+        _ForwardIterator1 __first1,
+        _ForwardIterator1 __last1,
+        _ForwardIterator2 __first2,
+        _ForwardIterator2 __last2,
+        _ForwardOutIterator __result,
+        _Comp __comp = {}) noexcept {
+  using _Backend = typename __select_backend<_RawPolicy>::type;
+  return std::__pstl_merge<_RawPolicy>(
+      _Backend{},
+      std::move(__first1),
+      std::move(__last1),
+      std::move(__first2),
+      std::move(__last2),
+      std::move(__result),
+      std::move(__comp));
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator1,
+          class _ForwardIterator2,
+          class _ForwardOutIterator,
+          class _Comp                                         = std::less<>,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
-merge(_ExecutionPolicy&&,
+merge(_ExecutionPolicy&& __policy,
       _ForwardIterator1 __first1,
       _ForwardIterator1 __last1,
       _ForwardIterator2 __first2,
       _ForwardIterator2 __last2,
       _ForwardOutIterator __result,
       _Comp __comp = {}) {
-  using _Backend = typename __select_backend<_RawPolicy>::type;
-  return std::__pstl_merge<_RawPolicy>(
-      _Backend{},
+  auto __res = std::__merge(
+      __policy,
       std::move(__first1),
       std::move(__last1),
       std::move(__first2),
       std::move(__last2),
       std::move(__result),
       std::move(__comp));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
 }
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_replace.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_replace.h
index 08f59ce2de..05dee3f6a4 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_replace.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_replace.h
@@ -18,6 +18,7 @@
 #include <__type_traits/enable_if.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -36,19 +37,21 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-replace_if(_ExecutionPolicy&& __policy,
-           _ForwardIterator __first,
-           _ForwardIterator __last,
-           _Pred __pred,
-           const _Tp& __new_value) {
-  std::__pstl_frontend_dispatch(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__replace_if(_ExecutionPolicy&& __policy,
+             _ForwardIterator&& __first,
+             _ForwardIterator&& __last,
+             _Pred&& __pred,
+             const _Tp& __new_value) noexcept {
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_if, _RawPolicy),
-      [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Pred __g_pred, const _Tp& __g_new_value) {
+      [&__policy](
+          _ForwardIterator&& __g_first, _ForwardIterator&& __g_last, _Pred&& __g_pred, const _Tp& __g_new_value) {
         std::for_each(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) {
           if (__g_pred(__element))
             __element = __g_new_value;
         });
+        return optional<__empty>{__empty{}};
       },
       std::move(__first),
       std::move(__last),
@@ -56,6 +59,23 @@ replace_if(_ExecutionPolicy&& __policy,
       __new_value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Pred,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+replace_if(_ExecutionPolicy&& __policy,
+           _ForwardIterator __first,
+           _ForwardIterator __last,
+           _Pred __pred,
+           const _Tp& __new_value) {
+  auto __res = std::__replace_if(__policy, std::move(__first), std::move(__last), std::move(__pred), __new_value);
+  if (!__res)
+    std::__throw_bad_alloc();
+}
+
 template <class>
 void __pstl_replace();
 
@@ -64,17 +84,17 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-replace(_ExecutionPolicy&& __policy,
-        _ForwardIterator __first,
-        _ForwardIterator __last,
-        const _Tp& __old_value,
-        const _Tp& __new_value) {
-  std::__pstl_frontend_dispatch(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
+__replace(_ExecutionPolicy&& __policy,
+          _ForwardIterator __first,
+          _ForwardIterator __last,
+          const _Tp& __old_value,
+          const _Tp& __new_value) noexcept {
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace, _RawPolicy),
       [&__policy](
           _ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_old_value, const _Tp& __g_new_value) {
-        std::replace_if(
+        return std::__replace_if(
             __policy,
             std::move(__g_first),
             std::move(__g_last),
@@ -87,6 +107,21 @@ replace(_ExecutionPolicy&& __policy,
       __new_value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+replace(_ExecutionPolicy&& __policy,
+        _ForwardIterator __first,
+        _ForwardIterator __last,
+        const _Tp& __old_value,
+        const _Tp& __new_value) {
+  if (!std::__replace(__policy, std::move(__first), std::move(__last), __old_value, __new_value))
+    std::__throw_bad_alloc();
+}
+
 template <class>
 void __pstl_replace_copy_if();
 
@@ -97,23 +132,26 @@ template <class _ExecutionPolicy,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void replace_copy_if(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __replace_copy_if(
     _ExecutionPolicy&& __policy,
-    _ForwardIterator __first,
-    _ForwardIterator __last,
-    _ForwardOutIterator __result,
-    _Pred __pred,
+    _ForwardIterator&& __first,
+    _ForwardIterator&& __last,
+    _ForwardOutIterator&& __result,
+    _Pred&& __pred,
     const _Tp& __new_value) {
-  std::__pstl_frontend_dispatch(
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_copy_if, _RawPolicy),
       [&__policy](_ForwardIterator __g_first,
                   _ForwardIterator __g_last,
                   _ForwardOutIterator __g_result,
                   _Pred __g_pred,
-                  const _Tp& __g_new_value) {
-        std::transform(__policy, __g_first, __g_last, __g_result, [&](__iter_reference<_ForwardIterator> __element) {
-          return __g_pred(__element) ? __g_new_value : __element;
-        });
+                  const _Tp& __g_new_value) -> optional<__empty> {
+        if (!std::__transform(
+                __policy, __g_first, __g_last, __g_result, [&](__iter_reference<_ForwardIterator> __element) {
+                  return __g_pred(__element) ? __g_new_value : __element;
+                }))
+          return nullopt;
+        return __empty{};
       },
       std::move(__first),
       std::move(__last),
@@ -122,30 +160,49 @@ _LIBCPP_HIDE_FROM_ABI void replace_copy_if(
       __new_value);
 }
 
-template <class>
-void __pstl_replace_copy();
-
 template <class _ExecutionPolicy,
           class _ForwardIterator,
           class _ForwardOutIterator,
+          class _Pred,
           class _Tp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void replace_copy(
+_LIBCPP_HIDE_FROM_ABI void replace_copy_if(
     _ExecutionPolicy&& __policy,
     _ForwardIterator __first,
     _ForwardIterator __last,
     _ForwardOutIterator __result,
-    const _Tp& __old_value,
+    _Pred __pred,
     const _Tp& __new_value) {
-  std::__pstl_frontend_dispatch(
+  if (!std::__replace_copy_if(
+          __policy, std::move(__first), std::move(__last), std::move(__result), std::move(__pred), __new_value))
+    std::__throw_bad_alloc();
+}
+
+template <class>
+void __pstl_replace_copy();
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _ForwardOutIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __replace_copy(
+    _ExecutionPolicy&& __policy,
+    _ForwardIterator&& __first,
+    _ForwardIterator&& __last,
+    _ForwardOutIterator&& __result,
+    const _Tp& __old_value,
+    const _Tp& __new_value) noexcept {
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_copy, _RawPolicy),
       [&__policy](_ForwardIterator __g_first,
                   _ForwardIterator __g_last,
                   _ForwardOutIterator __g_result,
                   const _Tp& __g_old_value,
                   const _Tp& __g_new_value) {
-        return std::replace_copy_if(
+        return std::__replace_copy_if(
             __policy,
             std::move(__g_first),
             std::move(__g_last),
@@ -160,6 +217,24 @@ _LIBCPP_HIDE_FROM_ABI void replace_copy(
       __new_value);
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _ForwardOutIterator,
+          class _Tp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void replace_copy(
+    _ExecutionPolicy&& __policy,
+    _ForwardIterator __first,
+    _ForwardIterator __last,
+    _ForwardOutIterator __result,
+    const _Tp& __old_value,
+    const _Tp& __new_value) {
+  if (!std::__replace_copy(
+          __policy, std::move(__first), std::move(__last), std::move(__result), __old_value, __new_value))
+    std::__throw_bad_alloc();
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_sort.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_sort.h
index 85239df0ab..3e71e0aa5a 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_sort.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_sort.h
@@ -16,8 +16,10 @@
 #include <__functional/operations.h>
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
+#include <__utility/empty.h>
 #include <__utility/forward.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -35,12 +37,13 @@ template <class _ExecutionPolicy,
           class _Comp,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-sort(_ExecutionPolicy&& __policy, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp) {
-  std::__pstl_frontend_dispatch(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __sort(
+    _ExecutionPolicy&& __policy, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp) noexcept {
+  return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_sort, _RawPolicy),
       [&__policy](_RandomAccessIterator __g_first, _RandomAccessIterator __g_last, _Comp __g_comp) {
         std::stable_sort(__policy, std::move(__g_first), std::move(__g_last), std::move(__g_comp));
+        return optional<__empty>{__empty{}};
       },
       std::move(__first),
       std::move(__last),
@@ -49,6 +52,17 @@ sort(_ExecutionPolicy&& __policy, _RandomAccessIterator __first, _RandomAccessIt
 
 template <class _ExecutionPolicy,
           class _RandomAccessIterator,
+          class _Comp,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void
+sort(_ExecutionPolicy&& __policy, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp) {
+  if (!std::__sort(__policy, std::move(__first), std::move(__last), std::move(__comp)))
+    std::__throw_bad_alloc();
+}
+
+template <class _ExecutionPolicy,
+          class _RandomAccessIterator,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI void
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_stable_sort.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_stable_sort.h
index 510ffd8629..c9d375535f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_stable_sort.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_stable_sort.h
@@ -15,7 +15,9 @@
 #include <__type_traits/enable_if.h>
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
+#include <__utility/empty.h>
 #include <__utility/move.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -30,10 +32,21 @@ template <class _ExecutionPolicy,
           class _Comp                                         = less<>,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI void
-stable_sort(_ExecutionPolicy&&, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp = {}) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __stable_sort(
+    _ExecutionPolicy&&, _RandomAccessIterator&& __first, _RandomAccessIterator&& __last, _Comp&& __comp = {}) noexcept {
   using _Backend = typename __select_backend<_RawPolicy>::type;
-  std::__pstl_stable_sort<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__comp));
+  return std::__pstl_stable_sort<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__comp));
+}
+
+template <class _ExecutionPolicy,
+          class _RandomAccessIterator,
+          class _Comp                                         = less<>,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI void stable_sort(
+    _ExecutionPolicy&& __policy, _RandomAccessIterator __first, _RandomAccessIterator __last, _Comp __comp = {}) {
+  if (!std::__stable_sort(__policy, std::move(__first), std::move(__last), std::move(__comp)))
+    std::__throw_bad_alloc();
 }
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_transform.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_transform.h
index a34439304a..aad59d1f30 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_transform.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/pstl_transform.h
@@ -16,7 +16,7 @@
 #include <__type_traits/is_execution_policy.h>
 #include <__type_traits/remove_cvref.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -32,8 +32,25 @@ template <class _ExecutionPolicy,
           class _UnaryOperation,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardOutIterator>>
+__transform(_ExecutionPolicy&&,
+            _ForwardIterator&& __first,
+            _ForwardIterator&& __last,
+            _ForwardOutIterator&& __result,
+            _UnaryOperation&& __op) noexcept {
+  using _Backend = typename __select_backend<_RawPolicy>::type;
+  return std::__pstl_transform<_RawPolicy>(
+      _Backend{}, std::move(__first), std::move(__last), std::move(__result), std::move(__op));
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _ForwardOutIterator,
+          class _UnaryOperation,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform(
-    _ExecutionPolicy&&,
+    _ExecutionPolicy&& __policy,
     _ForwardIterator __first,
     _ForwardIterator __last,
     _ForwardOutIterator __result,
@@ -41,9 +58,29 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform(
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardOutIterator);
   _LIBCPP_REQUIRE_CPP17_OUTPUT_ITERATOR(_ForwardOutIterator, decltype(__op(*__first)));
+  auto __res = std::__transform(__policy, std::move(__first), std::move(__last), std::move(__result), std::move(__op));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator1,
+          class _ForwardIterator2,
+          class _ForwardOutIterator,
+          class _BinaryOperation,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardOutIterator>>
+__transform(_ExecutionPolicy&&,
+            _ForwardIterator1&& __first1,
+            _ForwardIterator1&& __last1,
+            _ForwardIterator2&& __first2,
+            _ForwardOutIterator&& __result,
+            _BinaryOperation&& __op) noexcept {
   using _Backend = typename __select_backend<_RawPolicy>::type;
   return std::__pstl_transform<_RawPolicy>(
-      _Backend{}, std::move(__first), std::move(__last), std::move(__result), std::move(__op));
+      _Backend{}, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__result), std::move(__op));
 }
 
 template <class _ExecutionPolicy,
@@ -54,7 +91,7 @@ template <class _ExecutionPolicy,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform(
-    _ExecutionPolicy&&,
+    _ExecutionPolicy&& __policy,
     _ForwardIterator1 __first1,
     _ForwardIterator1 __last1,
     _ForwardIterator2 __first2,
@@ -64,9 +101,11 @@ _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform(
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator2);
   _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardOutIterator);
   _LIBCPP_REQUIRE_CPP17_OUTPUT_ITERATOR(_ForwardOutIterator, decltype(__op(*__first1, *__first2)));
-  using _Backend = typename __select_backend<_RawPolicy>::type;
-  return std::__pstl_transform<_RawPolicy>(
-      _Backend{}, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__result), std::move(__op));
+  auto __res = std::__transform(
+      __policy, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__result), std::move(__op));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
 }
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/ranges_count.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/ranges_count.h
index 82f5456756..4c8f1b2cbe 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/ranges_count.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/ranges_count.h
@@ -9,7 +9,8 @@
 #ifndef _LIBCPP___ALGORITHM_RANGES_COUNT_H
 #define _LIBCPP___ALGORITHM_RANGES_COUNT_H
 
-#include <__algorithm/ranges_count_if.h>
+#include <__algorithm/count.h>
+#include <__algorithm/iterator_operations.h>
 #include <__config>
 #include <__functional/identity.h>
 #include <__functional/ranges_operations.h>
@@ -36,16 +37,14 @@ struct __fn {
     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr iter_difference_t<_Iter>
   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
-    auto __pred = [&](auto&& __e) { return __e == __value; };
-    return ranges::__count_if_impl(std::move(__first), std::move(__last), __pred, __proj);
+    return std::__count<_RangeAlgPolicy>(std::move(__first), std::move(__last), __value, __proj);
   }
 
   template <input_range _Range, class _Type, class _Proj = identity>
     requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr range_difference_t<_Range>
   operator()(_Range&& __r, const _Type& __value, _Proj __proj = {}) const {
-    auto __pred = [&](auto&& __e) { return __e == __value; };
-    return ranges::__count_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);
+    return std::__count<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), __value, __proj);
   }
 };
 } // namespace __count
diff --git a/contrib/libs/cxxsupp/libcxx/include/__atomic/atomic_base.h b/contrib/libs/cxxsupp/libcxx/include/__atomic/atomic_base.h
index 87100ba5d8..775d06d757 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__atomic/atomic_base.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__atomic/atomic_base.h
@@ -39,7 +39,7 @@ struct __atomic_base  // false
 
     _LIBCPP_HIDE_FROM_ABI
     bool is_lock_free() const volatile _NOEXCEPT
-        {return __cxx_atomic_is_lock_free(sizeof(_Tp));}
+        {return __cxx_atomic_is_lock_free(sizeof(__cxx_atomic_impl<_Tp>));}
     _LIBCPP_HIDE_FROM_ABI
     bool is_lock_free() const _NOEXCEPT
         {return static_cast<__atomic_base const volatile*>(this)->is_lock_free();}
diff --git a/contrib/libs/cxxsupp/libcxx/include/__availability b/contrib/libs/cxxsupp/libcxx/include/__availability
index 579698ec1e..a6367945ed 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__availability
+++ b/contrib/libs/cxxsupp/libcxx/include/__availability
@@ -179,6 +179,17 @@
 // #   define _LIBCPP_AVAILABILITY_HAS_NO_TZDB
 #   define _LIBCPP_AVAILABILITY_TZDB
 
+// Enable additional explicit instantiations of iostreams components. This
+// reduces the number of weak definitions generated in programs that use
+// iostreams by providing a single strong definition in the shared library.
+//
+// TODO: Enable additional explicit instantiations on GCC once it supports exclude_from_explicit_instantiation,
+//       or once libc++ doesn't use the attribute anymore.
+// TODO: Enable them on Windows once https://llvm.org/PR41018 has been fixed.
+#if defined(_LIBCPP_COMPILER_GCC) || defined(_WIN32)
+#  define _LIBCPP_AVAILABILITY_HAS_NO_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
+#endif
+
 #elif defined(__APPLE__)
 
     // shared_mutex and shared_timed_mutex
@@ -356,6 +367,12 @@
 #  define _LIBCPP_AVAILABILITY_HAS_NO_TZDB
 #  define _LIBCPP_AVAILABILITY_TZDB __attribute__((unavailable))
 
+#  if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 120000)   || \
+      (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 150000) || \
+      (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 150000)         || \
+      (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 80000)
+#    define _LIBCPP_AVAILABILITY_HAS_NO_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
+#  endif
 #else
 
 // ...New vendors can add availability markup here...
diff --git a/contrib/libs/cxxsupp/libcxx/include/__bit_reference b/contrib/libs/cxxsupp/libcxx/include/__bit_reference
index 107368759c..9032b8f018 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__bit_reference
+++ b/contrib/libs/cxxsupp/libcxx/include/__bit_reference
@@ -171,45 +171,6 @@ private:
   __bit_const_reference& operator=(const __bit_const_reference&) = delete;
 };
 
-// count
-
-template <bool _ToCount, class _Cp, bool _IsConst>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 typename __bit_iterator<_Cp, _IsConst>::difference_type
-__count_bool(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n) {
-  using _It             = __bit_iterator<_Cp, _IsConst>;
-  using __storage_type  = typename _It::__storage_type;
-  using difference_type = typename _It::difference_type;
-
-  const int __bits_per_word = _It::__bits_per_word;
-  difference_type __r       = 0;
-  // do first partial word
-  if (__first.__ctz_ != 0) {
-    __storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
-    __storage_type __dn    = std::min(__clz_f, __n);
-    __storage_type __m     = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
-    __r                    = std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
-    __n -= __dn;
-    ++__first.__seg_;
-  }
-  // do middle whole words
-  for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
-    __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_));
-  // do last partial word
-  if (__n > 0) {
-    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
-    __r += std::__libcpp_popcount(std::__invert_if<!_ToCount>(*__first.__seg_) & __m);
-  }
-  return __r;
-}
-
-template <class _Cp, bool _IsConst, class _Tp>
-inline _LIBCPP_HIDE_FROM_ABI typename __bit_iterator<_Cp, _IsConst>::difference_type
-count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value) {
-  if (static_cast<bool>(__value))
-    return std::__count_bool<true>(__first, static_cast<typename _Cp::size_type>(__last - __first));
-  return std::__count_bool<false>(__first, static_cast<typename _Cp::size_type>(__last - __first));
-}
-
 // fill_n
 
 template <bool _FillValue, class _Cp>
@@ -1092,7 +1053,7 @@ private:
   _LIBCPP_CONSTEXPR_SINCE_CXX20 friend __bit_iterator<_Dp, _IC>
       __find_bool(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
   template <bool _ToCount, class _Dp, bool _IC>
-  friend typename __bit_iterator<_Dp, _IC>::difference_type _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
+  friend typename __bit_iterator<_Dp, _IC>::difference_type _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
       __count_bool(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
 };
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__concepts/swappable.h b/contrib/libs/cxxsupp/libcxx/include/__concepts/swappable.h
index c1969de345..cdffe34205 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__concepts/swappable.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__concepts/swappable.h
@@ -92,7 +92,7 @@ struct __fn {
   // 2.3   Otherwise, if `E1` and `E2` are lvalues of the same type `T` that models...
   template <__exchangeable _Tp>
   _LIBCPP_HIDE_FROM_ABI constexpr void operator()(_Tp& __x, _Tp& __y) const
-      noexcept(is_nothrow_move_constructible_v<_Tp>&& is_nothrow_move_assignable_v<_Tp>) {
+      noexcept(is_nothrow_move_constructible_v<_Tp> && is_nothrow_move_assignable_v<_Tp>) {
     __y = _VSTD::exchange(__x, _VSTD::move(__y));
   }
 };
diff --git a/contrib/libs/cxxsupp/libcxx/include/__config b/contrib/libs/cxxsupp/libcxx/include/__config
index f804928a6a..4856162769 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__config
+++ b/contrib/libs/cxxsupp/libcxx/include/__config
@@ -194,6 +194,11 @@
 // The implementation moved to the header, but we still export the symbols from
 // the dylib for backwards compatibility.
 #    define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
+// Save memory by providing the allocator more freedom to allocate the most
+// efficient size class by dropping the alignment requirements for std::string's
+// pointer from 16 to 8. This changes the output of std::string::max_size,
+// which makes it ABI breaking
+#    define _LIBCPP_ABI_STRING_8_BYTE_ALIGNMENT
 #  elif _LIBCPP_ABI_VERSION == 1
 #    if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF))
 // Enable compiling copies of now inline methods into the dylib to support
@@ -220,11 +225,6 @@
 #  endif
 
 #  if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2
-// Enable additional explicit instantiations of iostreams components. This
-// reduces the number of weak definitions generated in programs that use
-// iostreams by providing a single strong definition in the shared library.
-#    define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
-
 // Define a key function for `bad_function_call` in the library, to centralize
 // its vtable and typeinfo to libc++ rather than having all other libraries
 // using that class define their own copies.
@@ -246,11 +246,10 @@
 
 // HARDENING {
 
-// TODO(hardening): remove this in LLVM 19.
+// TODO(hardening): deprecate this in LLVM 19.
 // This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes)
 // equivalent to setting the safe mode.
 #  ifdef _LIBCPP_ENABLE_ASSERTIONS
-#    warning "_LIBCPP_ENABLE_ASSERTIONS is deprecated, please use _LIBCPP_ENABLE_SAFE_MODE instead."
 #    if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1
 #      error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1"
 #    endif
diff --git a/contrib/libs/cxxsupp/libcxx/include/__expected/expected.h b/contrib/libs/cxxsupp/libcxx/include/__expected/expected.h
index 3f468fc63b..3f25e00859 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__expected/expected.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__expected/expected.h
@@ -119,9 +119,7 @@ public:
   _LIBCPP_HIDE_FROM_ABI constexpr expected()
     noexcept(is_nothrow_default_constructible_v<_Tp>) // strengthened
     requires is_default_constructible_v<_Tp>
-      : __has_val_(true) {
-    std::construct_at(std::addressof(__union_.__val_));
-  }
+      : __union_(std::in_place), __has_val_(true) {}
 
   _LIBCPP_HIDE_FROM_ABI constexpr expected(const expected&) = delete;
 
@@ -136,14 +134,7 @@ public:
     noexcept(is_nothrow_copy_constructible_v<_Tp> && is_nothrow_copy_constructible_v<_Err>) // strengthened
     requires(is_copy_constructible_v<_Tp> && is_copy_constructible_v<_Err> &&
              !(is_trivially_copy_constructible_v<_Tp> && is_trivially_copy_constructible_v<_Err>))
-      : __has_val_(__other.__has_val_) {
-    if (__has_val_) {
-      std::construct_at(std::addressof(__union_.__val_), __other.__union_.__val_);
-    } else {
-      std::construct_at(std::addressof(__union_.__unex_), __other.__union_.__unex_);
-    }
-  }
-
+      : __union_(__other.__has_val_, __other.__union_), __has_val_(__other.__has_val_) { }
 
   _LIBCPP_HIDE_FROM_ABI constexpr expected(expected&&)
     requires(is_move_constructible_v<_Tp> && is_move_constructible_v<_Err>
@@ -154,13 +145,7 @@ public:
     noexcept(is_nothrow_move_constructible_v<_Tp> && is_nothrow_move_constructible_v<_Err>)
     requires(is_move_constructible_v<_Tp> && is_move_constructible_v<_Err> &&
              !(is_trivially_move_constructible_v<_Tp> && is_trivially_move_constructible_v<_Err>))
-      : __has_val_(__other.__has_val_) {
-    if (__has_val_) {
-      std::construct_at(std::addressof(__union_.__val_), std::move(__other.__union_.__val_));
-    } else {
-      std::construct_at(std::addressof(__union_.__unex_), std::move(__other.__union_.__unex_));
-    }
-  }
+      : __union_(__other.__has_val_, std::move(__other.__union_)), __has_val_(__other.__has_val_) { }
 
 private:
   template <class _Up, class _OtherErr, class _UfQual, class _OtherErrQual>
@@ -200,26 +185,14 @@ public:
   expected(const expected<_Up, _OtherErr>& __other)
     noexcept(is_nothrow_constructible_v<_Tp, const _Up&> &&
              is_nothrow_constructible_v<_Err, const _OtherErr&>) // strengthened
-      : __has_val_(__other.__has_val_) {
-    if (__has_val_) {
-      std::construct_at(std::addressof(__union_.__val_), __other.__union_.__val_);
-    } else {
-      std::construct_at(std::addressof(__union_.__unex_), __other.__union_.__unex_);
-    }
-  }
+      : __union_(__other.__has_val_, __other.__union_), __has_val_(__other.__has_val_) {}
 
   template <class _Up, class _OtherErr>
     requires __can_convert<_Up, _OtherErr, _Up, _OtherErr>::value
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_Up, _Tp> || !is_convertible_v<_OtherErr, _Err>)
   expected(expected<_Up, _OtherErr>&& __other)
     noexcept(is_nothrow_constructible_v<_Tp, _Up> && is_nothrow_constructible_v<_Err, _OtherErr>) // strengthened
-      : __has_val_(__other.__has_val_) {
-    if (__has_val_) {
-      std::construct_at(std::addressof(__union_.__val_), std::move(__other.__union_.__val_));
-    } else {
-      std::construct_at(std::addressof(__union_.__unex_), std::move(__other.__union_.__unex_));
-    }
-  }
+      : __union_(__other.__has_val_, std::move(__other.__union_)), __has_val_(__other.__has_val_) {}
 
   template <class _Up = _Tp>
     requires(!is_same_v<remove_cvref_t<_Up>, in_place_t> && !is_same_v<expected, remove_cvref_t<_Up>> &&
@@ -227,61 +200,47 @@ public:
              (!is_same_v<remove_cv_t<_Tp>, bool> || !__is_std_expected<remove_cvref_t<_Up>>::value))
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_Up, _Tp>)
       expected(_Up&& __u) noexcept(is_nothrow_constructible_v<_Tp, _Up>) // strengthened
-      : __has_val_(true) {
-    std::construct_at(std::addressof(__union_.__val_), std::forward<_Up>(__u));
-  }
+      : __union_(std::in_place, std::forward<_Up>(__u)), __has_val_(true) {}
 
   template <class _OtherErr>
     requires is_constructible_v<_Err, const _OtherErr&>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<const _OtherErr&, _Err>)
   expected(const unexpected<_OtherErr>& __unex)
     noexcept(is_nothrow_constructible_v<_Err, const _OtherErr&>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), __unex.error());
-  }
+      : __union_(std::unexpect, __unex.error()), __has_val_(false) {}
 
   template <class _OtherErr>
     requires is_constructible_v<_Err, _OtherErr>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_OtherErr, _Err>)
   expected(unexpected<_OtherErr>&& __unex)
     noexcept(is_nothrow_constructible_v<_Err, _OtherErr>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), std::move(__unex.error()));
-  }
+      : __union_(std::unexpect, std::move(__unex.error())), __has_val_(false) {}
 
   template <class... _Args>
     requires is_constructible_v<_Tp, _Args...>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(in_place_t, _Args&&... __args)
     noexcept(is_nothrow_constructible_v<_Tp, _Args...>) // strengthened
-      : __has_val_(true) {
-    std::construct_at(std::addressof(__union_.__val_), std::forward<_Args>(__args)...);
-  }
+      : __union_(std::in_place, std::forward<_Args>(__args)...), __has_val_(true) {}
 
   template <class _Up, class... _Args>
     requires is_constructible_v< _Tp, initializer_list<_Up>&, _Args... >
   _LIBCPP_HIDE_FROM_ABI constexpr explicit
   expected(in_place_t, initializer_list<_Up> __il, _Args&&... __args)
     noexcept(is_nothrow_constructible_v<_Tp, initializer_list<_Up>&, _Args...>) // strengthened
-      : __has_val_(true) {
-    std::construct_at(std::addressof(__union_.__val_), __il, std::forward<_Args>(__args)...);
-  }
+      : __union_(std::in_place, __il, std::forward<_Args>(__args)...), __has_val_(true) {}
 
   template <class... _Args>
     requires is_constructible_v<_Err, _Args...>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(unexpect_t, _Args&&... __args)
-    noexcept(is_nothrow_constructible_v<_Err, _Args...>)  // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), std::forward<_Args>(__args)...);
-  }
+    noexcept(is_nothrow_constructible_v<_Err, _Args...>) // strengthened
+      : __union_(std::unexpect, std::forward<_Args>(__args)...), __has_val_(false) {}
 
   template <class _Up, class... _Args>
     requires is_constructible_v< _Err, initializer_list<_Up>&, _Args... >
   _LIBCPP_HIDE_FROM_ABI constexpr explicit
   expected(unexpect_t, initializer_list<_Up> __il, _Args&&... __args)
     noexcept(is_nothrow_constructible_v<_Err, initializer_list<_Up>&, _Args...>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), __il, std::forward<_Args>(__args)...);
-  }
+      : __union_(std::unexpect, __il, std::forward<_Args>(__args)...), __has_val_(false) {}
 
   // [expected.object.dtor], destructor
 
@@ -440,9 +399,10 @@ public:
       std::destroy_at(std::addressof(__union_.__val_));
     } else {
       std::destroy_at(std::addressof(__union_.__unex_));
-      __has_val_ = true;
     }
-    return *std::construct_at(std::addressof(__union_.__val_), std::forward<_Args>(__args)...);
+    std::construct_at(std::addressof(__union_.__val_), std::forward<_Args>(__args)...);
+    __has_val_ = true;
+    return __union_.__val_;
   }
 
   template <class _Up, class... _Args>
@@ -452,9 +412,10 @@ public:
       std::destroy_at(std::addressof(__union_.__val_));
     } else {
       std::destroy_at(std::addressof(__union_.__unex_));
-      __has_val_ = true;
     }
-    return *std::construct_at(std::addressof(__union_.__val_), __il, std::forward<_Args>(__args)...);
+    std::construct_at(std::addressof(__union_.__val_), __il, std::forward<_Args>(__args)...);
+    __has_val_ = true;
+    return __union_.__val_;
   }
 
 
@@ -893,11 +854,15 @@ public:
   }
 
 private:
-  struct __empty_t {};
-
   template <class _ValueType, class _ErrorType>
   union __union_t {
-    _LIBCPP_HIDE_FROM_ABI constexpr __union_t() {}
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::in_place_t, _Args&&... __args)
+        : __val_(std::forward<_Args>(__args)...) {}
+
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::unexpect_t, _Args&&... __args)
+        : __unex_(std::forward<_Args>(__args)...) {}
 
     template <class _Func, class... _Args>
     _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(
@@ -909,6 +874,14 @@ private:
         std::__expected_construct_unexpected_from_invoke_tag, _Func&& __f, _Args&&... __args)
         : __unex_(std::invoke(std::forward<_Func>(__f), std::forward<_Args>(__args)...)) {}
 
+    template <class _Union>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(bool __has_val, _Union&& __other) {
+      if (__has_val)
+        std::construct_at(std::addressof(__val_), std::forward<_Union>(__other).__val_);
+      else
+        std::construct_at(std::addressof(__unex_), std::forward<_Union>(__other).__unex_);
+    }
+
     _LIBCPP_HIDE_FROM_ABI constexpr ~__union_t()
       requires(is_trivially_destructible_v<_ValueType> && is_trivially_destructible_v<_ErrorType>)
     = default;
@@ -927,10 +900,17 @@ private:
   template <class _ValueType, class _ErrorType>
     requires(is_trivially_move_constructible_v<_ValueType> && is_trivially_move_constructible_v<_ErrorType>)
   union __union_t<_ValueType, _ErrorType> {
-    _LIBCPP_HIDE_FROM_ABI constexpr __union_t() : __empty_() {}
     _LIBCPP_HIDE_FROM_ABI constexpr __union_t(const __union_t&) = default;
     _LIBCPP_HIDE_FROM_ABI constexpr __union_t& operator=(const __union_t&) = default;
 
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::in_place_t, _Args&&... __args)
+        : __val_(std::forward<_Args>(__args)...) {}
+
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::unexpect_t, _Args&&... __args)
+        : __unex_(std::forward<_Args>(__args)...) {}
+
     template <class _Func, class... _Args>
     _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(
         std::__expected_construct_in_place_from_invoke_tag, _Func&& __f, _Args&&... __args)
@@ -941,6 +921,14 @@ private:
         std::__expected_construct_unexpected_from_invoke_tag, _Func&& __f, _Args&&... __args)
         : __unex_(std::invoke(std::forward<_Func>(__f), std::forward<_Args>(__args)...)) {}
 
+    template <class _Union>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(bool __has_val, _Union&& __other) {
+      if (__has_val)
+        std::construct_at(std::addressof(__val_), std::forward<_Union>(__other).__val_);
+      else
+        std::construct_at(std::addressof(__unex_), std::forward<_Union>(__other).__unex_);
+    }
+
     _LIBCPP_HIDE_FROM_ABI constexpr ~__union_t()
       requires(is_trivially_destructible_v<_ValueType> && is_trivially_destructible_v<_ErrorType>)
     = default;
@@ -950,7 +938,6 @@ private:
       requires(!is_trivially_destructible_v<_ValueType> || !is_trivially_destructible_v<_ErrorType>)
     {}
 
-    _LIBCPP_NO_UNIQUE_ADDRESS __empty_t __empty_;
     _LIBCPP_NO_UNIQUE_ADDRESS _ValueType __val_;
     _LIBCPP_NO_UNIQUE_ADDRESS _ErrorType __unex_;
   };
@@ -998,11 +985,7 @@ public:
   _LIBCPP_HIDE_FROM_ABI constexpr expected(const expected& __rhs)
     noexcept(is_nothrow_copy_constructible_v<_Err>) // strengthened
     requires(is_copy_constructible_v<_Err> && !is_trivially_copy_constructible_v<_Err>)
-      : __has_val_(__rhs.__has_val_) {
-    if (!__rhs.__has_val_) {
-      std::construct_at(std::addressof(__union_.__unex_), __rhs.__union_.__unex_);
-    }
-  }
+      : __union_(__rhs.__has_val_, __rhs.__union_), __has_val_(__rhs.__has_val_) {}
 
   _LIBCPP_HIDE_FROM_ABI constexpr expected(expected&&)
     requires(is_move_constructible_v<_Err> && is_trivially_move_constructible_v<_Err>)
@@ -1011,51 +994,35 @@ public:
   _LIBCPP_HIDE_FROM_ABI constexpr expected(expected&& __rhs)
     noexcept(is_nothrow_move_constructible_v<_Err>)
     requires(is_move_constructible_v<_Err> && !is_trivially_move_constructible_v<_Err>)
-      : __has_val_(__rhs.__has_val_) {
-    if (!__rhs.__has_val_) {
-      std::construct_at(std::addressof(__union_.__unex_), std::move(__rhs.__union_.__unex_));
-    }
-  }
+      : __union_(__rhs.__has_val_, std::move(__rhs.__union_)), __has_val_(__rhs.__has_val_) {}
 
   template <class _Up, class _OtherErr>
     requires __can_convert<_Up, _OtherErr, const _OtherErr&>::value
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<const _OtherErr&, _Err>)
   expected(const expected<_Up, _OtherErr>& __rhs)
     noexcept(is_nothrow_constructible_v<_Err, const _OtherErr&>) // strengthened
-      : __has_val_(__rhs.__has_val_) {
-    if (!__rhs.__has_val_) {
-      std::construct_at(std::addressof(__union_.__unex_), __rhs.__union_.__unex_);
-    }
-  }
+      : __union_(__rhs.__has_val_, __rhs.__union_), __has_val_(__rhs.__has_val_) {}
 
   template <class _Up, class _OtherErr>
     requires __can_convert<_Up, _OtherErr, _OtherErr>::value
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_OtherErr, _Err>)
   expected(expected<_Up, _OtherErr>&& __rhs)
     noexcept(is_nothrow_constructible_v<_Err, _OtherErr>) // strengthened
-      : __has_val_(__rhs.__has_val_) {
-    if (!__rhs.__has_val_) {
-      std::construct_at(std::addressof(__union_.__unex_), std::move(__rhs.__union_.__unex_));
-    }
-  }
+      : __union_(__rhs.__has_val_, std::move(__rhs.__union_)), __has_val_(__rhs.__has_val_) {}
 
   template <class _OtherErr>
     requires is_constructible_v<_Err, const _OtherErr&>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<const _OtherErr&, _Err>)
   expected(const unexpected<_OtherErr>& __unex)
     noexcept(is_nothrow_constructible_v<_Err, const _OtherErr&>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), __unex.error());
-  }
+      : __union_(std::unexpect, __unex.error()), __has_val_(false) {}
 
   template <class _OtherErr>
     requires is_constructible_v<_Err, _OtherErr>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_OtherErr, _Err>)
   expected(unexpected<_OtherErr>&& __unex)
     noexcept(is_nothrow_constructible_v<_Err, _OtherErr>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), std::move(__unex.error()));
-  }
+      : __union_(std::unexpect, std::move(__unex.error())), __has_val_(false) {}
 
   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(in_place_t) noexcept : __has_val_(true) {}
 
@@ -1063,17 +1030,13 @@ public:
     requires is_constructible_v<_Err, _Args...>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(unexpect_t, _Args&&... __args)
     noexcept(is_nothrow_constructible_v<_Err, _Args...>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), std::forward<_Args>(__args)...);
-  }
+      : __union_(std::unexpect, std::forward<_Args>(__args)...), __has_val_(false) {}
 
   template <class _Up, class... _Args>
     requires is_constructible_v< _Err, initializer_list<_Up>&, _Args... >
   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(unexpect_t, initializer_list<_Up> __il, _Args&&... __args)
     noexcept(is_nothrow_constructible_v<_Err, initializer_list<_Up>&, _Args...>) // strengthened
-      : __has_val_(false) {
-    std::construct_at(std::addressof(__union_.__unex_), __il, std::forward<_Args>(__args)...);
-  }
+      : __union_(std::unexpect, __il, std::forward<_Args>(__args)...), __has_val_(false) {}
 
 private:
   template <class _Func>
@@ -1507,11 +1470,23 @@ private:
   union __union_t {
     _LIBCPP_HIDE_FROM_ABI constexpr __union_t() : __empty_() {}
 
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::unexpect_t, _Args&&... __args)
+        : __unex_(std::forward<_Args>(__args)...) {}
+
     template <class _Func, class... _Args>
     _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(
         __expected_construct_unexpected_from_invoke_tag, _Func&& __f, _Args&&... __args)
         : __unex_(std::invoke(std::forward<_Func>(__f), std::forward<_Args>(__args)...)) {}
 
+    template <class _Union>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(bool __has_val, _Union&& __other) {
+      if (__has_val)
+        std::construct_at(std::addressof(__empty_));
+      else
+        std::construct_at(std::addressof(__unex_), std::forward<_Union>(__other).__unex_);
+    }
+
     _LIBCPP_HIDE_FROM_ABI constexpr ~__union_t()
       requires(is_trivially_destructible_v<_ErrorType>)
     = default;
@@ -1534,11 +1509,23 @@ private:
     _LIBCPP_HIDE_FROM_ABI constexpr __union_t(const __union_t&) = default;
     _LIBCPP_HIDE_FROM_ABI constexpr __union_t& operator=(const __union_t&) = default;
 
+    template <class... _Args>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(std::unexpect_t, _Args&&... __args)
+        : __unex_(std::forward<_Args>(__args)...) {}
+
     template <class _Func, class... _Args>
     _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(
         __expected_construct_unexpected_from_invoke_tag, _Func&& __f, _Args&&... __args)
         : __unex_(std::invoke(std::forward<_Func>(__f), std::forward<_Args>(__args)...)) {}
 
+    template <class _Union>
+    _LIBCPP_HIDE_FROM_ABI constexpr explicit __union_t(bool __has_val, _Union&& __other) {
+      if (__has_val)
+        std::construct_at(std::addressof(__empty_));
+      else
+        std::construct_at(std::addressof(__unex_), std::forward<_Union>(__other).__unex_);
+    }
+
     _LIBCPP_HIDE_FROM_ABI constexpr ~__union_t()
       requires(is_trivially_destructible_v<_ErrorType>)
     = default;
diff --git a/contrib/libs/cxxsupp/libcxx/include/__iterator/reverse_iterator.h b/contrib/libs/cxxsupp/libcxx/include/__iterator/reverse_iterator.h
index 60969e1751..c1241da5d1 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__iterator/reverse_iterator.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__iterator/reverse_iterator.h
@@ -144,7 +144,7 @@ public:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
     reference operator*() const {_Iter __tmp = current; return *--__tmp;}
 
-#if (_LIBCPP_STD_VER >= 20) && !defined(__NVCC__)
+#if (_LIBCPP_STD_VER >= 20) && !defined(__CUDACC__)
     _LIBCPP_INLINE_VISIBILITY
     constexpr pointer operator->() const
       requires is_pointer_v<_Iter> || requires(const _Iter __i) { __i.operator->(); }
diff --git a/contrib/libs/cxxsupp/libcxx/include/__mdspan/extents.h b/contrib/libs/cxxsupp/libcxx/include/__mdspan/extents.h
index a510220d40..f6bcd940ee 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__mdspan/extents.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__mdspan/extents.h
@@ -456,7 +456,7 @@ using dextents = typename __mdspan_detail::__make_dextents<_IndexType, _Rank>::t
 
 // Deduction guide for extents
 template <class... _IndexTypes>
-extents(_IndexTypes...) -> extents<size_t, size_t((_IndexTypes(), dynamic_extent))...>;
+extents(_IndexTypes...) -> extents<size_t, size_t(((void)sizeof(_IndexTypes), dynamic_extent))...>;
 
 namespace __mdspan_detail {
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__memory/uses_allocator_construction.h b/contrib/libs/cxxsupp/libcxx/include/__memory/uses_allocator_construction.h
index a2e4f6e26f..71ae5bcd32 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__memory/uses_allocator_construction.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__memory/uses_allocator_construction.h
@@ -12,6 +12,7 @@
 #include <__config>
 #include <__memory/construct_at.h>
 #include <__memory/uses_allocator.h>
+#include <__tuple/pair_like.h>
 #include <__type_traits/enable_if.h>
 #include <__type_traits/is_same.h>
 #include <__type_traits/remove_cv.h>
@@ -36,15 +37,19 @@ inline constexpr bool __is_std_pair = false;
 template <class _Type1, class _Type2>
 inline constexpr bool __is_std_pair<pair<_Type1, _Type2>> = true;
 
-template <class _Type, class _Alloc, class... _Args, __enable_if_t<!__is_std_pair<_Type>, int> = 0>
+template <class _Tp>
+inline constexpr bool __is_cv_std_pair = __is_std_pair<remove_cv_t<_Tp>>;
+
+template <class _Type, class _Alloc, class... _Args, __enable_if_t<!__is_cv_std_pair<_Type>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, _Args&&... __args) noexcept {
-  if constexpr (!uses_allocator_v<_Type, _Alloc> && is_constructible_v<_Type, _Args...>) {
+  if constexpr (!uses_allocator_v<remove_cv_t<_Type>, _Alloc> && is_constructible_v<_Type, _Args...>) {
     return std::forward_as_tuple(std::forward<_Args>(__args)...);
-  } else if constexpr (uses_allocator_v<_Type, _Alloc> &&
+  } else if constexpr (uses_allocator_v<remove_cv_t<_Type>, _Alloc> &&
                        is_constructible_v<_Type, allocator_arg_t, const _Alloc&, _Args...>) {
     return tuple<allocator_arg_t, const _Alloc&, _Args&&...>(allocator_arg, __alloc, std::forward<_Args>(__args)...);
-  } else if constexpr (uses_allocator_v<_Type, _Alloc> && is_constructible_v<_Type, _Args..., const _Alloc&>) {
+  } else if constexpr (uses_allocator_v<remove_cv_t<_Type>, _Alloc> &&
+                       is_constructible_v<_Type, _Args..., const _Alloc&>) {
     return std::forward_as_tuple(std::forward<_Args>(__args)..., __alloc);
   } else {
     static_assert(
@@ -52,7 +57,7 @@ __uses_allocator_construction_args(const _Alloc& __alloc, _Args&&... __args) noe
   }
 }
 
-template <class _Pair, class _Alloc, class _Tuple1, class _Tuple2, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Tuple1, class _Tuple2, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto __uses_allocator_construction_args(
     const _Alloc& __alloc, piecewise_construct_t, _Tuple1&& __x, _Tuple2&& __y) noexcept {
   return std::make_tuple(
@@ -71,12 +76,12 @@ _LIBCPP_HIDE_FROM_ABI constexpr auto __uses_allocator_construction_args(
           std::forward<_Tuple2>(__y)));
 }
 
-template <class _Pair, class _Alloc, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto __uses_allocator_construction_args(const _Alloc& __alloc) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(__alloc, piecewise_construct, tuple<>{}, tuple<>{});
 }
 
-template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, _Up&& __u, _Vp&& __v) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(
@@ -87,7 +92,7 @@ __uses_allocator_construction_args(const _Alloc& __alloc, _Up&& __u, _Vp&& __v)
 }
 
 #  if _LIBCPP_STD_VER >= 23
-template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, pair<_Up, _Vp>& __pair) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(
@@ -95,14 +100,14 @@ __uses_allocator_construction_args(const _Alloc& __alloc, pair<_Up, _Vp>& __pair
 }
 #  endif
 
-template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, const pair<_Up, _Vp>& __pair) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(
       __alloc, piecewise_construct, std::forward_as_tuple(__pair.first), std::forward_as_tuple(__pair.second));
 }
 
-template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, pair<_Up, _Vp>&& __pair) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(
@@ -113,7 +118,7 @@ __uses_allocator_construction_args(const _Alloc& __alloc, pair<_Up, _Vp>&& __pai
 }
 
 #  if _LIBCPP_STD_VER >= 23
-template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_std_pair<_Pair>, int> = 0>
+template <class _Pair, class _Alloc, class _Up, class _Vp, __enable_if_t<__is_cv_std_pair<_Pair>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, const pair<_Up, _Vp>&& __pair) noexcept {
   return std::__uses_allocator_construction_args<_Pair>(
@@ -122,6 +127,20 @@ __uses_allocator_construction_args(const _Alloc& __alloc, const pair<_Up, _Vp>&&
       std::forward_as_tuple(std::get<0>(std::move(__pair))),
       std::forward_as_tuple(std::get<1>(std::move(__pair))));
 }
+
+template < class _Pair,
+           class _Alloc,
+           __pair_like _PairLike,
+           __enable_if_t<__is_cv_std_pair<_Pair> && !__is_specialization_of_subrange<remove_cvref_t<_PairLike>>::value,
+                         int> = 0>
+_LIBCPP_HIDE_FROM_ABI constexpr auto
+__uses_allocator_construction_args(const _Alloc& __alloc, _PairLike&& __p) noexcept {
+  return std::__uses_allocator_construction_args<_Pair>(
+      __alloc,
+      piecewise_construct,
+      std::forward_as_tuple(std::get<0>(std::forward<_PairLike>(__p))),
+      std::forward_as_tuple(std::get<1>(std::forward<_PairLike>(__p))));
+}
 #  endif
 
 namespace __uses_allocator_detail {
@@ -139,23 +158,33 @@ template <class _Tp>
 inline constexpr bool __convertible_to_const_pair_ref =
     decltype(__uses_allocator_detail::__convertible_to_const_pair_ref_impl<_Tp>(0))::value;
 
+#  if _LIBCPP_STD_VER >= 23
+template <class _Tp, class _Up>
+inline constexpr bool __uses_allocator_constraints =
+    __is_cv_std_pair<_Tp> &&
+    (__is_specialization_of_subrange<remove_cvref_t<_Up>>::value ||
+     (!__pair_like<_Up> && !__convertible_to_const_pair_ref<_Up>));
+#  else
+template <class _Tp, class _Up>
+inline constexpr bool __uses_allocator_constraints = __is_cv_std_pair<_Tp> && !__convertible_to_const_pair_ref<_Up>;
+#  endif
+
 } // namespace __uses_allocator_detail
 
-template <
-    class _Pair,
-    class _Alloc,
-    class _Type,
-    __enable_if_t<__is_std_pair<_Pair> && !__uses_allocator_detail::__convertible_to_const_pair_ref<_Type>, int> = 0>
+template < class _Pair,
+           class _Alloc,
+           class _Type,
+           __enable_if_t<__uses_allocator_detail::__uses_allocator_constraints<_Pair, _Type>, int> = 0>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, _Type&& __value) noexcept;
 
 template <class _Type, class _Alloc, class... _Args>
 _LIBCPP_HIDE_FROM_ABI constexpr _Type __make_obj_using_allocator(const _Alloc& __alloc, _Args&&... __args);
 
-template <class _Pair,
-          class _Alloc,
-          class _Type,
-          __enable_if_t<__is_std_pair<_Pair> && !__uses_allocator_detail::__convertible_to_const_pair_ref<_Type>, int>>
+template < class _Pair,
+           class _Alloc,
+           class _Type,
+           __enable_if_t< __uses_allocator_detail::__uses_allocator_constraints<_Pair, _Type>, int>>
 _LIBCPP_HIDE_FROM_ABI constexpr auto
 __uses_allocator_construction_args(const _Alloc& __alloc, _Type&& __value) noexcept {
   struct __pair_constructor {
diff --git a/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_reduce.h b/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_reduce.h
index 22ef2707d7..b19972a46d 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_reduce.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_reduce.h
@@ -33,16 +33,16 @@ template <class _ExecutionPolicy,
           class _BinaryOperation                              = plus<>,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _Tp
-reduce(_ExecutionPolicy&& __policy,
-       _ForwardIterator __first,
-       _ForwardIterator __last,
-       _Tp __init,
-       _BinaryOperation __op = {}) {
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_Tp>
+__reduce(_ExecutionPolicy&& __policy,
+         _ForwardIterator&& __first,
+         _ForwardIterator&& __last,
+         _Tp&& __init,
+         _BinaryOperation&& __op = {}) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_reduce, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Tp __g_init, _BinaryOperation __g_op) {
-        return std::transform_reduce(
+        return std::__transform_reduce(
             __policy, std::move(__g_first), std::move(__g_last), std::move(__g_init), std::move(__g_op), __identity{});
       },
       std::move(__first),
@@ -53,19 +53,50 @@ reduce(_ExecutionPolicy&& __policy,
 
 template <class _ExecutionPolicy,
           class _ForwardIterator,
+          class _Tp,
+          class _BinaryOperation                              = plus<>,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI __iter_value_type<_ForwardIterator>
-reduce(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last) {
+_LIBCPP_HIDE_FROM_ABI _Tp
+reduce(_ExecutionPolicy&& __policy,
+       _ForwardIterator __first,
+       _ForwardIterator __last,
+       _Tp __init,
+       _BinaryOperation __op = {}) {
+  auto __res = std::__reduce(__policy, std::move(__first), std::move(__last), std::move(__init), std::move(__op));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__iter_value_type<_ForwardIterator>>
+__reduce(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last) noexcept {
   return std::__pstl_frontend_dispatch(
       _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_reduce, _RawPolicy),
       [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last) {
-        return std::reduce(__policy, __g_first, __g_last, __iter_value_type<_ForwardIterator>());
+        return std::__reduce(
+            __policy, std::move(__g_first), std::move(__g_last), __iter_value_type<_ForwardIterator>());
       },
       std::move(__first),
       std::move(__last));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI __iter_value_type<_ForwardIterator>
+reduce(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last) {
+  auto __res = std::__reduce(__policy, std::move(__first), std::move(__last));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_transform_reduce.h b/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_transform_reduce.h
index b7c9d8d288..4127ee21e3 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_transform_reduce.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__numeric/pstl_transform_reduce.h
@@ -16,7 +16,7 @@
 #include <__numeric/transform_reduce.h>
 #include <__type_traits/is_execution_policy.h>
 #include <__utility/move.h>
-#include <__utility/terminate_on_exception.h>
+#include <optional>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -34,23 +34,53 @@ template <class _ExecutionPolicy,
           class _BinaryOperation2,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _Tp transform_reduce(
+_LIBCPP_HIDE_FROM_ABI optional<_Tp> __transform_reduce(
     _ExecutionPolicy&&,
+    _ForwardIterator1&& __first1,
+    _ForwardIterator1&& __last1,
+    _ForwardIterator2&& __first2,
+    _Tp&& __init,
+    _BinaryOperation1&& __reduce,
+    _BinaryOperation2&& __transform) noexcept {
+  using _Backend = typename __select_backend<_RawPolicy>::type;
+  return std::__pstl_transform_reduce<_RawPolicy>(
+      _Backend{},
+      std::move(__first1),
+      std::move(__last1),
+      std::move(__first2),
+      std::move(__init),
+      std::move(__reduce),
+      std::move(__transform));
+}
+
+template <class _ExecutionPolicy,
+          class _ForwardIterator1,
+          class _ForwardIterator2,
+          class _Tp,
+          class _BinaryOperation1,
+          class _BinaryOperation2,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _Tp transform_reduce(
+    _ExecutionPolicy&& __policy,
     _ForwardIterator1 __first1,
     _ForwardIterator1 __last1,
     _ForwardIterator2 __first2,
     _Tp __init,
     _BinaryOperation1 __reduce,
     _BinaryOperation2 __transform) {
-  using _Backend = typename __select_backend<_RawPolicy>::type;
-  return std::__pstl_transform_reduce<_RawPolicy>(
-      _Backend{},
+  auto __res = std::__transform_reduce(
+      __policy,
       std::move(__first1),
       std::move(__last1),
       std::move(__first2),
       std::move(__init),
       std::move(__reduce),
       std::move(__transform));
+
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
 }
 
 // This overload doesn't get a customization point because it's trivial to detect (through e.g.
@@ -76,13 +106,13 @@ template <class _ExecutionPolicy,
           class _UnaryOperation,
           class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
           enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
-_LIBCPP_HIDE_FROM_ABI _Tp transform_reduce(
+[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_Tp>> __transform_reduce(
     _ExecutionPolicy&&,
-    _ForwardIterator __first,
-    _ForwardIterator __last,
-    _Tp __init,
-    _BinaryOperation __reduce,
-    _UnaryOperation __transform) {
+    _ForwardIterator&& __first,
+    _ForwardIterator&& __last,
+    _Tp&& __init,
+    _BinaryOperation&& __reduce,
+    _UnaryOperation&& __transform) noexcept {
   using _Backend = typename __select_backend<_RawPolicy>::type;
   return std::__pstl_transform_reduce<_RawPolicy>(
       _Backend{},
@@ -93,6 +123,27 @@ _LIBCPP_HIDE_FROM_ABI _Tp transform_reduce(
       std::move(__transform));
 }
 
+template <class _ExecutionPolicy,
+          class _ForwardIterator,
+          class _Tp,
+          class _BinaryOperation,
+          class _UnaryOperation,
+          class _RawPolicy                                    = __remove_cvref_t<_ExecutionPolicy>,
+          enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
+_LIBCPP_HIDE_FROM_ABI _Tp transform_reduce(
+    _ExecutionPolicy&& __policy,
+    _ForwardIterator __first,
+    _ForwardIterator __last,
+    _Tp __init,
+    _BinaryOperation __reduce,
+    _UnaryOperation __transform) {
+  auto __res = std::__transform_reduce(
+      __policy, std::move(__first), std::move(__last), std::move(__init), std::move(__reduce), std::move(__transform));
+  if (!__res)
+    std::__throw_bad_alloc();
+  return *std::move(__res);
+}
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
diff --git a/contrib/libs/cxxsupp/libcxx/include/__ranges/to.h b/contrib/libs/cxxsupp/libcxx/include/__ranges/to.h
index a519662e75..cf162100ee 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__ranges/to.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__ranges/to.h
@@ -207,13 +207,11 @@ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr auto to(_Args&&... __args)
   static_assert(
       !is_volatile_v<_Container>, "The target container cannot be volatile-qualified, please remove the volatile");
 
-  auto __to_func = []<input_range _Range, class... _Tail>(_Range && __range, _Tail && ... __tail)
+  auto __to_func = []<input_range _Range, class... _Tail>(_Range&& __range, _Tail&&... __tail)
     requires requires { //
       /**/ ranges::to<_Container>(std::forward<_Range>(__range), std::forward<_Tail>(__tail)...);
     }
-  {
-    return ranges::to<_Container>(std::forward<_Range>(__range), std::forward<_Tail>(__tail)...);
-  };
+  { return ranges::to<_Container>(std::forward<_Range>(__range), std::forward<_Tail>(__tail)...); };
 
   return __range_adaptor_closure_t(std::__bind_back(__to_func, std::forward<_Args>(__args)...));
 }
diff --git a/contrib/libs/cxxsupp/libcxx/include/__std_clang_module b/contrib/libs/cxxsupp/libcxx/include/__std_clang_module
index 4d02336d30..e2e9e85ffc 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__std_clang_module
+++ b/contrib/libs/cxxsupp/libcxx/include/__std_clang_module
@@ -135,7 +135,6 @@
 #if !defined(_LIBCPP_HAS_NO_THREADS)
 #  include <latch>
 #endif
-#include <limits.h>
 #include <limits>
 #include <list>
 #if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
@@ -170,7 +169,6 @@
 #  include <semaphore>
 #endif
 #include <set>
-#include <setjmp.h>
 #if !defined(_LIBCPP_HAS_NO_THREADS)
 #  include <shared_mutex>
 #endif
diff --git a/contrib/libs/cxxsupp/libcxx/include/__type_traits/datasizeof.h b/contrib/libs/cxxsupp/libcxx/include/__type_traits/datasizeof.h
index 019099a9cf..5688e3293a 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__type_traits/datasizeof.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__type_traits/datasizeof.h
@@ -47,7 +47,12 @@ struct __libcpp_datasizeof {
   };
 #endif
 
+  // _FirstPaddingByte<> is sometimes non-standard layout. Using `offsetof` is UB in that case, but GCC and Clang allow
+  // the use as an extension.
+  _LIBCPP_DIAGNOSTIC_PUSH
+  _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Winvalid-offsetof")
   static const size_t value = offsetof(_FirstPaddingByte<>, __first_padding_byte_);
+  _LIBCPP_DIAGNOSTIC_POP
 };
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/contrib/libs/cxxsupp/libcxx/include/__type_traits/promote.h b/contrib/libs/cxxsupp/libcxx/include/__type_traits/promote.h
index 018bd69df2..e22b4a422c 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__type_traits/promote.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__type_traits/promote.h
@@ -50,7 +50,7 @@ struct __numeric_type<void> {
 template <class _A1,
           class _A2 = void,
           class _A3 = void,
-          bool      = __numeric_type<_A1>::value&& __numeric_type<_A2>::value&& __numeric_type<_A3>::value>
+          bool      = __numeric_type<_A1>::value && __numeric_type<_A2>::value && __numeric_type<_A3>::value>
 class __promote_imp {
 public:
   static const bool value = false;
diff --git a/contrib/libs/cxxsupp/libcxx/include/setjmp.h b/contrib/libs/cxxsupp/libcxx/include/__utility/empty.h
index f4a2bbcb0b..8cca197145 100644
--- a/contrib/libs/cxxsupp/libcxx/include/setjmp.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__utility/empty.h
@@ -1,4 +1,3 @@
-// -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
@@ -7,23 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBCPP_SETJMP_H
-#define _LIBCPP_SETJMP_H
-
-/*
-    setjmp.h synopsis
-
-Macros:
-
-    setjmp
-
-Types:
-
-    jmp_buf
-
-void longjmp(jmp_buf env, int val);
-
-*/
+#ifndef _LIBCPP___UTILITY_EMPTY_H
+#define _LIBCPP___UTILITY_EMPTY_H
 
 #include <__config>
 
@@ -31,16 +15,10 @@ void longjmp(jmp_buf env, int val);
 #  pragma GCC system_header
 #endif
 
-#if __has_include_next(<setjmp.h>)
-#  include_next <setjmp.h>
-#endif
+_LIBCPP_BEGIN_NAMESPACE_STD
 
-#ifdef __cplusplus
-
-#ifndef setjmp
-#define setjmp(env) setjmp(env)
-#endif
+struct __empty {};
 
-#endif // __cplusplus
+_LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_SETJMP_H
+#endif // _LIBCPP___UTILITY_EMPTY_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__utility/pair.h b/contrib/libs/cxxsupp/libcxx/include/__utility/pair.h
index 62dac6dd1d..535344eb1e 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__utility/pair.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__utility/pair.h
@@ -284,7 +284,8 @@ struct _LIBCPP_TEMPLATE_VIS pair
     }
 
     template <__pair_like _PairLike>
-      requires(is_constructible_v<first_type, decltype(std::get<0>(std::declval<_PairLike&&>()))> &&
+      requires(!__is_specialization_of_subrange<remove_cvref_t<_PairLike>>::value &&
+               is_constructible_v<first_type, decltype(std::get<0>(std::declval<_PairLike&&>()))> &&
                is_constructible_v<second_type, decltype(std::get<1>(std::declval<_PairLike&&>()))>)
     _LIBCPP_HIDE_FROM_ABI constexpr explicit(__pair_like_explicit_wknd<_PairLike>())
         pair(_PairLike&& __p)
diff --git a/contrib/libs/cxxsupp/libcxx/include/__utility/terminate_on_exception.h b/contrib/libs/cxxsupp/libcxx/include/__utility/terminate_on_exception.h
deleted file mode 100644
index e035ec3409..0000000000
--- a/contrib/libs/cxxsupp/libcxx/include/__utility/terminate_on_exception.h
+++ /dev/null
@@ -1,48 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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___UTILITY_TERMINATE_ON_EXCEPTION_H
-#define _LIBCPP___UTILITY_TERMINATE_ON_EXCEPTION_H
-
-#include <__config>
-#include <__exception/terminate.h>
-#include <new>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-#if _LIBCPP_STD_VER >= 17
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#  ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-
-template <class _Func>
-_LIBCPP_HIDE_FROM_ABI auto __terminate_on_exception(_Func __func) {
-  try {
-    return __func();
-  } catch (...) {
-    std::terminate();
-  }
-}
-
-#  else // _LIBCPP_HAS_NO_EXCEPTIONS
-
-template <class _Func>
-_LIBCPP_HIDE_FROM_ABI auto __terminate_on_exception(_Func __func) {
-  return __func();
-}
-
-#  endif // _LIBCPP_HAS_NO_EXCEPTIONS
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP_STD_VER >= 17
-
-#endif // _LIBCPP___UTILITY_TERMINATE_ON_EXCEPTION_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/bitset b/contrib/libs/cxxsupp/libcxx/include/bitset
index 7ad332cc0d..d7112a7a8c 100644
--- a/contrib/libs/cxxsupp/libcxx/include/bitset
+++ b/contrib/libs/cxxsupp/libcxx/include/bitset
@@ -122,6 +122,7 @@ template <size_t N> struct hash<std::bitset<N>>;
 
 */
 
+#include <__algorithm/count.h>
 #include <__algorithm/fill.h>
 #include <__algorithm/find.h>
 #include <__assert> // all public C++ headers provide the assertion handler
@@ -1046,7 +1047,7 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
 size_t
 bitset<_Size>::count() const _NOEXCEPT
 {
-    return static_cast<size_t>(_VSTD::__count_bool<true>(base::__make_iter(0), _Size));
+    return static_cast<size_t>(std::count(base::__make_iter(0), base::__make_iter(_Size), true));
 }
 
 template <size_t _Size>
diff --git a/contrib/libs/cxxsupp/libcxx/include/climits b/contrib/libs/cxxsupp/libcxx/include/climits
index d773af50d2..2e8993e4d6 100644
--- a/contrib/libs/cxxsupp/libcxx/include/climits
+++ b/contrib/libs/cxxsupp/libcxx/include/climits
@@ -42,14 +42,6 @@ Macros:
 
 #include <limits.h>
 
-#ifndef _LIBCPP_LIMITS_H
-#   error <climits> tried including <limits.h> but didn't find libc++'s <limits.h> header. \
-          This usually means that your header search paths are not configured properly. \
-          The header search paths should contain the C++ Standard Library headers before \
-          any C Standard Library, and you are probably using compiler flags that make that \
-          not be the case.
-#endif
-
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
diff --git a/contrib/libs/cxxsupp/libcxx/include/csetjmp b/contrib/libs/cxxsupp/libcxx/include/csetjmp
index 4c64e8327e..d219c8e6cb 100644
--- a/contrib/libs/cxxsupp/libcxx/include/csetjmp
+++ b/contrib/libs/cxxsupp/libcxx/include/csetjmp
@@ -35,14 +35,6 @@ void longjmp(jmp_buf env, int val);
 
 #include <setjmp.h>
 
-#ifndef _LIBCPP_SETJMP_H
-#   error <csetjmp> tried including <setjmp.h> but didn't find libc++'s <setjmp.h> header. \
-          This usually means that your header search paths are not configured properly. \
-          The header search paths should contain the C++ Standard Library headers before \
-          any C Standard Library, and you are probably using compiler flags that make that \
-          not be the case.
-#endif
-
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
index 341292612e..479809392f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
@@ -46,6 +46,11 @@ struct __simd_operations<_Tp, simd_abi::__scalar> {
   using _MaskStorage = __mask_storage<_Tp, simd_abi::__scalar>;
 
   static _LIBCPP_HIDE_FROM_ABI _SimdStorage __broadcast(_Tp __v) noexcept { return {__v}; }
+
+  template <class _Generator>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate(_Generator&& __g) noexcept {
+    return {__g(std::integral_constant<size_t, 0>())};
+  }
 };
 
 template <class _Tp>
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
index 30856f4b03..954f94c907 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
@@ -44,6 +44,10 @@ public:
   template <class _Up, enable_if_t<__can_broadcast_v<value_type, __remove_cvref_t<_Up>>, int> = 0>
   _LIBCPP_HIDE_FROM_ABI simd(_Up&& __v) noexcept : __s_(_Impl::__broadcast(static_cast<value_type>(__v))) {}
 
+  // generator constructor
+  template <class _Generator, enable_if_t<__can_generate_v<value_type, _Generator, size()>, int> = 0>
+  explicit _LIBCPP_HIDE_FROM_ABI simd(_Generator&& __g) : __s_(_Impl::__generate(std::forward<_Generator>(__g))) {}
+
   // scalar access [simd.subscr]
   // Add operator[] temporarily to test braodcast. Add test for it in later patch.
   _LIBCPP_HIDE_FROM_ABI value_type operator[](size_t __i) const { return __s_.__get(__i); }
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
index 0dba345e05..847d006629 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
@@ -19,6 +19,7 @@
 #include <__type_traits/is_volatile.h>
 #include <__type_traits/void_t.h>
 #include <__utility/declval.h>
+#include <__utility/integer_sequence.h>
 #include <cstdint>
 #include <limits>
 
@@ -71,6 +72,25 @@ inline constexpr bool __can_broadcast_v =
     (!__is_vectorizable_v<_Up> && is_convertible_v<_Up, _Tp>) || is_same_v<_Up, int> ||
     (is_same_v<_Up, unsigned int> && is_unsigned_v<_Tp>);
 
+template <class _Tp, class _Generator, std::size_t _Idx, class = void>
+inline constexpr bool __is_well_formed = false;
+
+template <class _Tp, class _Generator, std::size_t _Idx>
+inline constexpr bool
+    __is_well_formed<_Tp,
+                     _Generator,
+                     _Idx,
+                     std::void_t<decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>> =
+        __can_broadcast_v<_Tp, decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>;
+
+template <class _Tp, class _Generator, std::size_t... _Idxes>
+_LIBCPP_HIDE_FROM_ABI constexpr bool __can_generate(index_sequence<_Idxes...>) {
+  return (true && ... && __is_well_formed<_Tp, _Generator, _Idxes>);
+}
+
+template <class _Tp, class _Generator, std::size_t _Size>
+inline constexpr bool __can_generate_v = experimental::__can_generate<_Tp, _Generator>(make_index_sequence<_Size>());
+
 } // namespace parallelism_v2
 _LIBCPP_END_NAMESPACE_EXPERIMENTAL
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
index 44a1f481ab..4b23bfe384 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
@@ -11,6 +11,7 @@
 #define _LIBCPP_EXPERIMENTAL___SIMD_VEC_EXT_H
 
 #include <__bit/bit_ceil.h>
+#include <__utility/forward.h>
 #include <cstddef>
 #include <experimental/__simd/internal_declaration.h>
 #include <experimental/__simd/utility.h>
@@ -56,6 +57,16 @@ struct __simd_operations<_Tp, simd_abi::__vec_ext<_Np>> {
     }
     return __result;
   }
+
+  template <class _Generator, size_t... _Is>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate_init(_Generator&& __g, std::index_sequence<_Is...>) {
+    return _SimdStorage{{__g(std::integral_constant<size_t, _Is>())...}};
+  }
+
+  template <class _Generator>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate(_Generator&& __g) noexcept {
+    return __generate_init(std::forward<_Generator>(__g), std::make_index_sequence<_Np>());
+  }
 };
 
 template <class _Tp, int _Np>
diff --git a/contrib/libs/cxxsupp/libcxx/include/fstream b/contrib/libs/cxxsupp/libcxx/include/fstream
index cf5ca142e7..024eef8a9d 100644
--- a/contrib/libs/cxxsupp/libcxx/include/fstream
+++ b/contrib/libs/cxxsupp/libcxx/include/fstream
@@ -1734,7 +1734,7 @@ basic_fstream<_CharT, _Traits>::close()
         this->setstate(ios_base::failbit);
 }
 
-#if defined(_LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1)
+#ifndef _LIBCPP_AVAILABILITY_HAS_NO_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>;
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>;
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>;
diff --git a/contrib/libs/cxxsupp/libcxx/include/functional b/contrib/libs/cxxsupp/libcxx/include/functional
index 5c60b9fc39..5f9e8fa82a 100644
--- a/contrib/libs/cxxsupp/libcxx/include/functional
+++ b/contrib/libs/cxxsupp/libcxx/include/functional
@@ -34,7 +34,7 @@ struct binary_function
 template <class T>
 class reference_wrapper
     : public unary_function<T1, R> // if wrapping a unary functor
-    : public binary_function<T1, T2, R> // if wraping a binary functor
+    : public binary_function<T1, T2, R> // if wrapping a binary functor
 {
 public:
     // types
diff --git a/contrib/libs/cxxsupp/libcxx/include/limits b/contrib/libs/cxxsupp/libcxx/include/limits
index 9f5949e63c..51daee6c49 100644
--- a/contrib/libs/cxxsupp/libcxx/include/limits
+++ b/contrib/libs/cxxsupp/libcxx/include/limits
@@ -43,8 +43,8 @@ public:
     static constexpr bool has_infinity = false;
     static constexpr bool has_quiet_NaN = false;
     static constexpr bool has_signaling_NaN = false;
-    static constexpr float_denorm_style has_denorm = denorm_absent;
-    static constexpr bool has_denorm_loss = false;
+    static constexpr float_denorm_style has_denorm = denorm_absent; // deprecated in C++23
+    static constexpr bool has_denorm_loss = false;                  // deprecated in C++23
     static constexpr T infinity() noexcept;
     static constexpr T quiet_NaN() noexcept;
     static constexpr T signaling_NaN() noexcept;
@@ -68,7 +68,7 @@ enum float_round_style
     round_toward_neg_infinity =  3
 };
 
-enum float_denorm_style
+enum float_denorm_style // deprecated in C++23
 {
     denorm_indeterminate = -1,
     denorm_absent = 0,
@@ -128,7 +128,7 @@ enum float_round_style
     round_toward_neg_infinity =  3
 };
 
-enum float_denorm_style
+enum _LIBCPP_DEPRECATED_IN_CXX23 float_denorm_style
 {
     denorm_indeterminate = -1,
     denorm_absent = 0,
@@ -164,8 +164,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = false;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = false;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = false;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return type();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return type();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return type();}
@@ -224,8 +224,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = false;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = false;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = false;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return type(0);}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return type(0);}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return type(0);}
@@ -277,8 +277,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = false;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = false;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = false;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_absent;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return type(0);}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return type(0);}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return type(0);}
@@ -323,8 +323,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = true;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = true;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = true;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __builtin_huge_valf();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __builtin_nanf("");}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __builtin_nansf("");}
@@ -373,8 +373,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = true;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = true;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = true;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __builtin_huge_val();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __builtin_nan("");}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __builtin_nans("");}
@@ -423,8 +423,8 @@ protected:
     static _LIBCPP_CONSTEXPR const bool has_infinity = true;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = true;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = true;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = denorm_present;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = false;
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __builtin_huge_vall();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __builtin_nanl("");}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __builtin_nansl("");}
@@ -477,8 +477,10 @@ public:
     static _LIBCPP_CONSTEXPR const bool has_infinity = __base::has_infinity;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = __base::has_quiet_NaN;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = __base::has_signaling_NaN;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __base::infinity();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __base::quiet_NaN();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __base::signaling_NaN();}
@@ -570,8 +572,10 @@ public:
     static _LIBCPP_CONSTEXPR const bool has_infinity = __base::has_infinity;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = __base::has_quiet_NaN;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = __base::has_signaling_NaN;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __base::infinity();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __base::quiet_NaN();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __base::signaling_NaN();}
@@ -663,8 +667,10 @@ public:
     static _LIBCPP_CONSTEXPR const bool has_infinity = __base::has_infinity;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = __base::has_quiet_NaN;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = __base::has_signaling_NaN;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __base::infinity();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __base::quiet_NaN();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __base::signaling_NaN();}
@@ -756,8 +762,10 @@ public:
     static _LIBCPP_CONSTEXPR const bool has_infinity = __base::has_infinity;
     static _LIBCPP_CONSTEXPR const bool has_quiet_NaN = __base::has_quiet_NaN;
     static _LIBCPP_CONSTEXPR const bool has_signaling_NaN = __base::has_signaling_NaN;
-    static _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
-    static _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const float_denorm_style has_denorm = __base::has_denorm;
+    static _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_CONSTEXPR const bool has_denorm_loss = __base::has_denorm_loss;
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT {return __base::infinity();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT {return __base::quiet_NaN();}
     _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT {return __base::signaling_NaN();}
diff --git a/contrib/libs/cxxsupp/libcxx/include/limits.h b/contrib/libs/cxxsupp/libcxx/include/limits.h
deleted file mode 100644
index 537a4b1439..0000000000
--- a/contrib/libs/cxxsupp/libcxx/include/limits.h
+++ /dev/null
@@ -1,71 +0,0 @@
-// -*- 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_LIMITS_H
-#define _LIBCPP_LIMITS_H
-
-/*
-    limits.h synopsis
-
-Macros:
-
-    CHAR_BIT
-    SCHAR_MIN
-    SCHAR_MAX
-    UCHAR_MAX
-    CHAR_MIN
-    CHAR_MAX
-    MB_LEN_MAX
-    SHRT_MIN
-    SHRT_MAX
-    USHRT_MAX
-    INT_MIN
-    INT_MAX
-    UINT_MAX
-    LONG_MIN
-    LONG_MAX
-    ULONG_MAX
-    LLONG_MIN   // C99
-    LLONG_MAX   // C99
-    ULLONG_MAX  // C99
-
-*/
-
-#include <__config>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-#ifdef _LIBCPP_COMPILER_GCC
-
-// GCC header limits.h recursively includes itself through another header called
-// syslimits.h for some reason. This setup breaks down if we directly
-// #include_next GCC's limits.h (reasons not entirely clear to me).
-// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107795 for more details.
-// Therefore, we manually re-create the necessary include sequence below:
-
-// Get the system limits.h defines (force recurse into the next level)
-#define _GCC_LIMITS_H_
-#define _GCC_NEXT_LIMITS_H
-#include_next <limits.h>
-
-// Get the ISO C defines
-#undef _GCC_LIMITS_H_
-#include_next <limits.h>
-
-#else
-
-#  if __has_include_next(<limits.h>)
-#    include_next <limits.h>
-#  endif
-
-#endif // _LIBCPP_COMPILER_GCC
-
-#endif // _LIBCPP_LIMITS_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/memory b/contrib/libs/cxxsupp/libcxx/include/memory
index cd6bcc7eaa..24ba82f43d 100644
--- a/contrib/libs/cxxsupp/libcxx/include/memory
+++ b/contrib/libs/cxxsupp/libcxx/include/memory
@@ -867,6 +867,43 @@ template <class T> struct hash<shared_ptr<T> >;
 template <class T, class Alloc>
   inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value;
 
+// [allocator.uses.construction], uses-allocator construction
+template<class T, class Alloc, class... Args>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  Args&&... args) noexcept;
+template<class T, class Alloc, class Tuple1, class Tuple2>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  piecewise_construct_t,
+                                                  Tuple1&& x, Tuple2&& y) noexcept;
+template<class T, class Alloc>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc) noexcept;   // since C++20
+template<class T, class Alloc, class U, class V>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  U&& u, V&& v) noexcept;
+template<class T, class Alloc, class U, class V>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++23
+                                                  pair<U, V>& pr) noexcept;
+template<class T, class Alloc, class U, class V>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  const pair<U, V>& pr) noexcept;
+template<class T, class Alloc, class U, class V>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  pair<U, V>&& pr) noexcept;
+template<class T, class Alloc, class U, class V>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++23
+                                                  const pair<U, V>&& pr) noexcept;
+template<class T, class Alloc, pair-like P>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  P&& p) noexcept;
+template<class T, class Alloc, class U>
+  constexpr auto uses_allocator_construction_args(const Alloc& alloc,             // since C++20
+                                                  U&& u) noexcept;
+template<class T, class Alloc, class... Args>
+  constexpr T make_obj_using_allocator(const Alloc& alloc, Args&&... args);       // since C++20
+template<class T, class Alloc, class... Args>
+  constexpr T* uninitialized_construct_using_allocator(T* p,                      // since C++20
+                                                         const Alloc& alloc, Args&&... args);
+
 // [ptr.align]
 void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/module.modulemap.in b/contrib/libs/cxxsupp/libcxx/include/module.modulemap.in
index 6d9bb8653f..3e5a8a391b 100644
--- a/contrib/libs/cxxsupp/libcxx/include/module.modulemap.in
+++ b/contrib/libs/cxxsupp/libcxx/include/module.modulemap.in
@@ -448,10 +448,6 @@ module std_inttypes_h [system] {
   export *
 }
 // <iso646.h> provided by compiler.
-module std_limits_h [system] {
-  header "limits.h"
-  export *
-}
 module std_locale_h [system] {
   header "locale.h"
   export *
@@ -460,10 +456,7 @@ module std_math_h [system] {
   header "math.h"
   export *
 }
-module std_setjmp_h [system] {
-  header "setjmp.h"
-  export *
-}
+// <setjmp.h> provided by C library.
 // <signal.h> provided by C library.
 // FIXME: <stdalign.h> is missing.
 // <stdarg.h> provided by compiler.
@@ -2053,6 +2046,7 @@ module std_private_utility_cmp                    [system] {
 }
 module std_private_utility_convert_to_integral    [system] { header "__utility/convert_to_integral.h" }
 module std_private_utility_declval                [system] { header "__utility/declval.h" }
+module std_private_utility_empty                  [system] { header "__utility/empty.h" }
 module std_private_utility_exception_guard        [system] { header "__utility/exception_guard.h" }
 module std_private_utility_exchange               [system] { header "__utility/exchange.h" }
 module std_private_utility_forward                [system] { header "__utility/forward.h" }
@@ -2088,7 +2082,6 @@ module std_private_utility_swap                   [system] {
   header "__utility/swap.h"
   export std_private_type_traits_is_swappable
 }
-module std_private_utility_terminate_on_exception [system] { header "__utility/terminate_on_exception.h" }
 module std_private_utility_to_underlying          [system] { header "__utility/to_underlying.h" }
 module std_private_utility_unreachable            [system] { header "__utility/unreachable.h" }
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/sstream b/contrib/libs/cxxsupp/libcxx/include/sstream
index 40930df24c..4fec465d57 100644
--- a/contrib/libs/cxxsupp/libcxx/include/sstream
+++ b/contrib/libs/cxxsupp/libcxx/include/sstream
@@ -267,6 +267,7 @@ typedef basic_stringstream<wchar_t> wstringstream;
 */
 
 #include <__assert> // all public C++ headers provide the assertion handler
+#include <__availability>
 #include <__config>
 #include <__fwd/sstream.h>
 #include <__utility/swap.h>
@@ -399,12 +400,12 @@ public:
     _LIBCPP_HIDE_FROM_ABI_SSTREAM string_type str() const & { return str(__str_.get_allocator()); }
 
     _LIBCPP_HIDE_FROM_ABI_SSTREAM string_type str() && {
-        string_type __result;
         const basic_string_view<_CharT, _Traits> __view = view();
-        if (!__view.empty()) {
-            auto __pos = __view.data() - __str_.data();
-            __result.assign(std::move(__str_), __pos, __view.size());
-        }
+        typename string_type::size_type __pos = __view.empty() ? 0 : __view.data() - __str_.data();
+        // In C++23, this is just string_type(std::move(__str_), __pos, __view.size(), __str_.get_allocator());
+        // But we need something that works in C++20 also.
+        string_type __result(__str_.get_allocator());
+        __result.__move_assign(std::move(__str_), __pos, __view.size());
         __str_.clear();
         __init_buf_ptrs();
         return __result;
@@ -1192,7 +1193,7 @@ swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,
     __x.swap(__y);
 }
 
-#if defined(_LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1)
+#ifndef _LIBCPP_AVAILABILITY_HAS_NO_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_stringbuf<char>;
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_stringstream<char>;
 extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ostringstream<char>;
diff --git a/contrib/libs/cxxsupp/libcxx/include/string b/contrib/libs/cxxsupp/libcxx/include/string
index 6550f5baf6..7320cf16a3 100644
--- a/contrib/libs/cxxsupp/libcxx/include/string
+++ b/contrib/libs/cxxsupp/libcxx/include/string
@@ -836,8 +836,8 @@ private:
     {
         union
         {
-            __long  __l;
             __short __s;
+            __long  __l;
             __raw   __r;
         };
     };
@@ -885,9 +885,7 @@ public:
 
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string()
       _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
-      : __r_(__default_init_tag(), __default_init_tag()) {
-    __default_init();
-  }
+      : __r_(__value_init_tag(), __default_init_tag()) {}
 
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a)
 #if _LIBCPP_STD_VER <= 14
@@ -895,9 +893,7 @@ public:
 #else
       _NOEXCEPT
 #endif
-      : __r_(__default_init_tag(), __a) {
-    __default_init();
-  }
+      : __r_(__value_init_tag(), __a) {}
 
   _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const basic_string& __str)
       : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) {
@@ -923,7 +919,7 @@ public:
       _NOEXCEPT
 #  endif
       : __r_(std::move(__str.__r_)) {
-    __str.__default_init();
+    __str.__r_.first() = __rep();
   }
 
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str, const allocator_type& __a)
@@ -934,7 +930,7 @@ public:
       if (__libcpp_is_constant_evaluated())
         __r_.first() = __rep();
       __r_.first() = __str.__r_.first();
-      __str.__default_init();
+      __str.__r_.first() = __rep();
     }
   }
 #endif // _LIBCPP_CXX03_LANG
@@ -994,12 +990,7 @@ public:
 
     auto __len = std::min<size_type>(__n, __str.size() - __pos);
     if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc()) {
-      __r_.first() = __str.__r_.first();
-      __str.__default_init();
-
-      _Traits::move(data(), data() + __pos, __len);
-      __set_size(__len);
-      _Traits::assign(data()[__len], value_type());
+      __move_assign(std::move(__str), __pos, __len);
     } else {
       // Perform a copy because the allocators are not compatible.
       __init(__str.data() + __pos, __len);
@@ -1368,6 +1359,20 @@ public:
     return assign(__sv.data(), __sv.size());
   }
 
+#if _LIBCPP_STD_VER >= 20
+  _LIBCPP_HIDE_FROM_ABI constexpr
+  void __move_assign(basic_string&& __str, size_type __pos, size_type __len) {
+    // Pilfer the allocation from __str.
+    _LIBCPP_ASSERT_INTERNAL(__alloc() == __str.__alloc(), "__move_assign called with wrong allocator");
+    __r_.first() = __str.__r_.first();
+    __str.__r_.first() = __rep();
+
+    _Traits::move(data(), data() + __pos, __len);
+    __set_size(__len);
+    _Traits::assign(data()[__len], value_type());
+  }
+#endif
+
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     basic_string& assign(const basic_string& __str) { return *this = __str; }
 #ifndef _LIBCPP_CXX03_LANG
@@ -1764,8 +1769,9 @@ private:
 
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     bool __is_long() const _NOEXCEPT {
-        if (__libcpp_is_constant_evaluated())
-            return true;
+        if (__libcpp_is_constant_evaluated() && __builtin_constant_p(__r_.first().__l.__is_long_)) {
+            return __r_.first().__l.__is_long_;
+        }
         return __r_.first().__s.__is_long_;
     }
 
@@ -1781,26 +1787,8 @@ private:
 #endif // _LIBCPP_STD_VER >= 20
     }
 
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __default_init() {
-        __r_.first() = __rep();
-        if (__libcpp_is_constant_evaluated()) {
-            size_type __sz = __recommend(0) + 1;
-            pointer __ptr = __alloc_traits::allocate(__alloc(), __sz);
-            __begin_lifetime(__ptr, __sz);
-            __set_long_pointer(__ptr);
-            __set_long_cap(__sz);
-            __set_long_size(0);
-        }
-    }
-
-    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __deallocate_constexpr() {
-        if (__libcpp_is_constant_evaluated() && __get_pointer() != nullptr)
-            __alloc_traits::deallocate(__alloc(), __get_pointer(), __get_long_cap());
-    }
-
     _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) {
-        // SSO is disabled during constant evaluation because `__is_long` isn't constexpr friendly
-        return !__libcpp_is_constant_evaluated() && (__sz < __min_cap);
+        return __sz < __min_cap;
     }
 
     template <class _Iterator, class _Sentinel>
@@ -1907,15 +1895,19 @@ private:
         _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
         size_type __align_it(size_type __s) _NOEXCEPT
             {return (__s + (__a-1)) & ~(__a-1);}
-    enum {__alignment = 16};
+    enum {
+      __alignment =
+#ifdef _LIBCPP_ABI_STRING_8_BYTE_ALIGNMENT
+      8
+#else
+      16
+#endif
+    };
     static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     size_type __recommend(size_type __s) _NOEXCEPT
     {
         if (__s < __min_cap) {
-            if (__libcpp_is_constant_evaluated())
-                return static_cast<size_type>(__min_cap);
-            else
-                return static_cast<size_type>(__min_cap) - 1;
+            return static_cast<size_type>(__min_cap) - 1;
         }
         size_type __guess = __align_it<sizeof(value_type) < __alignment ?
                      __alignment/sizeof(value_type) : 1 > (__s+1) - 1;
@@ -2056,7 +2048,7 @@ private:
     _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_external(const value_type* __s, size_type __n);
 
     // Assigns the value in __s, guaranteed to be __n < __min_cap in length.
-    inline basic_string& __assign_short(const value_type* __s, size_type __n) {
+    inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_short(const value_type* __s, size_type __n) {
       pointer __p = __is_long()
                         ? (__set_long_size(__n), __get_long_pointer())
                         : (__set_short_size(__n), __get_short_pointer());
@@ -2270,7 +2262,7 @@ template <class _CharT, class _Traits, class _Allocator>
 template <class _InputIterator, class _Sentinel>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
 void basic_string<_CharT, _Traits, _Allocator>::__init_with_sentinel(_InputIterator __first, _Sentinel __last) {
-    __default_init();
+    __r_.first() = __rep();
 
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
     try
@@ -2370,7 +2362,7 @@ basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace
     if (__sec_cp_sz != 0)
         traits_type::copy(std::__to_address(__p) + __n_copy + __n_add,
                           std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz);
-    if (__old_cap+1 != __min_cap || __libcpp_is_constant_evaluated())
+    if (__old_cap+1 != __min_cap)
         __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1);
     __set_long_pointer(__p);
     __set_long_cap(__allocation.count);
@@ -2410,7 +2402,7 @@ basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_t
         traits_type::copy(std::__to_address(__p) + __n_copy + __n_add,
                           std::__to_address(__old_p) + __n_copy + __n_del,
                           __sec_cp_sz);
-    if (__libcpp_is_constant_evaluated() || __old_cap + 1 != __min_cap)
+    if (__old_cap + 1 != __min_cap)
         __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1);
     __set_long_pointer(__p);
     __set_long_cap(__allocation.count);
@@ -2573,12 +2565,8 @@ basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, tr
   }
   __move_assign_alloc(__str);
   __r_.first() = __str.__r_.first();
-  if (__libcpp_is_constant_evaluated()) {
-    __str.__default_init();
-  } else {
-    __str.__set_short_size(0);
-    traits_type::assign(__str.__get_short_pointer()[0], value_type());
-  }
+  __str.__set_short_size(0);
+  traits_type::assign(__str.__get_short_pointer()[0], value_type());
 }
 
 #endif
@@ -2864,13 +2852,6 @@ basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_t
     if (__pos > __sz)
         __throw_out_of_range();
     size_type __cap = capacity();
-    if (__libcpp_is_constant_evaluated()) {
-        if (__cap - __sz >= __n)
-            __grow_by_and_replace(__cap, 0, __sz, __pos, 0, __n, __s);
-        else
-            __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s);
-        return *this;
-    }
     if (__cap - __sz >= __n)
     {
         if (__n)
@@ -2879,7 +2860,7 @@ basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_t
             size_type __n_move = __sz - __pos;
             if (__n_move != 0)
             {
-                if (__p + __pos <= __s && __s < __p + __sz)
+                if (std::__is_pointer_in_range(__p + __pos, __p + __sz, __s))
                     __s += __n;
                 traits_type::move(__p + __pos + __n, __p + __pos, __n_move);
             }
@@ -3902,7 +3883,7 @@ basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT
     if(__is_long())
     {
         __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1);
-        __default_init();
+        __r_.first() = __rep();
     }
 }
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/tuple b/contrib/libs/cxxsupp/libcxx/include/tuple
index eb1785cc89..63adb8ec30 100644
--- a/contrib/libs/cxxsupp/libcxx/include/tuple
+++ b/contrib/libs/cxxsupp/libcxx/include/tuple
@@ -592,51 +592,31 @@ class _LIBCPP_TEMPLATE_VIS tuple
 public:
     // [tuple.cnstr]
 
-    // tuple() constructors (including allocator_arg_t variants)
-    template <template<class...> class _IsImpDefault = __is_implicitly_default_constructible, __enable_if_t<
-        _And<
-            _IsImpDefault<_Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    tuple()
-        _NOEXCEPT_(_And<is_nothrow_default_constructible<_Tp>...>::value)
-    { }
+_LIBCPP_DIAGNOSTIC_PUSH
+_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions")
+_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions")
 
+    // tuple() constructors (including allocator_arg_t variants)
     template <template<class...> class _IsImpDefault = __is_implicitly_default_constructible,
               template<class...> class _IsDefault = is_default_constructible, __enable_if_t<
         _And<
-            _IsDefault<_Tp>...,
-            _Not<_Lazy<_And, _IsImpDefault<_Tp>...> > // explicit check
+            _IsDefault<_Tp>...
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-    explicit tuple()
+    explicit(_Not<_Lazy<_And, _IsImpDefault<_Tp>...> >::value) tuple()
         _NOEXCEPT_(_And<is_nothrow_default_constructible<_Tp>...>::value)
     { }
 
-    template <class _Alloc, template<class...> class _IsImpDefault = __is_implicitly_default_constructible, __enable_if_t<
-        _And<
-            _IsImpDefault<_Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, _Alloc const& __a)
-      : __base_(allocator_arg_t(), __a,
-                    __tuple_indices<>(), __tuple_types<>(),
-                    typename __make_tuple_indices<sizeof...(_Tp), 0>::type(),
-                    __tuple_types<_Tp...>()) {}
-
     template <class _Alloc,
               template<class...> class _IsImpDefault = __is_implicitly_default_constructible,
               template<class...> class _IsDefault = is_default_constructible, __enable_if_t<
         _And<
-            _IsDefault<_Tp>...,
-            _Not<_Lazy<_And, _IsImpDefault<_Tp>...> > // explicit check
+            _IsDefault<_Tp>...
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, _Alloc const& __a)
+    explicit(_Not<_Lazy<_And, _IsImpDefault<_Tp>...> >::value) tuple(allocator_arg_t, _Alloc const& __a)
       : __base_(allocator_arg_t(), __a,
                     __tuple_indices<>(), __tuple_types<>(),
                     typename __make_tuple_indices<sizeof...(_Tp), 0>::type(),
@@ -646,29 +626,11 @@ public:
     template <template<class...> class _And = _And, __enable_if_t<
         _And<
             _BoolConstant<sizeof...(_Tp) >= 1>,
-            is_copy_constructible<_Tp>...,
-            is_convertible<const _Tp&, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(const _Tp& ... __t)
-        _NOEXCEPT_(_And<is_nothrow_copy_constructible<_Tp>...>::value)
-        : __base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
-                typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
-                typename __make_tuple_indices<0>::type(),
-                typename __make_tuple_types<tuple, 0>::type(),
-                __t...
-               ) {}
-
-    template <template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _BoolConstant<sizeof...(_Tp) >= 1>,
-            is_copy_constructible<_Tp>...,
-            _Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> > // explicit check
+            is_copy_constructible<_Tp>...
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(const _Tp& ... __t)
+    explicit(_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> >::value) tuple(const _Tp& ... __t)
         _NOEXCEPT_(_And<is_nothrow_copy_constructible<_Tp>...>::value)
         : __base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
                 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
@@ -680,29 +642,11 @@ public:
     template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
         _And<
             _BoolConstant<sizeof...(_Tp) >= 1>,
-            is_copy_constructible<_Tp>...,
-            is_convertible<const _Tp&, _Tp>... // explicit check
+            is_copy_constructible<_Tp>...
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
-        : __base_(allocator_arg_t(), __a,
-                typename __make_tuple_indices<sizeof...(_Tp)>::type(),
-                typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
-                typename __make_tuple_indices<0>::type(),
-                typename __make_tuple_types<tuple, 0>::type(),
-                __t...
-               ) {}
-
-    template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _BoolConstant<sizeof...(_Tp) >= 1>,
-            is_copy_constructible<_Tp>...,
-            _Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> > // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
+    explicit(_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
         : __base_(allocator_arg_t(), __a,
                 typename __make_tuple_indices<sizeof...(_Tp)>::type(),
                 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
@@ -725,28 +669,17 @@ public:
     template <class ..._Up, __enable_if_t<
         _And<
             _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
-            _EnableUTypesCtor<_Up...>,
-            is_convertible<_Up, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(_Up&&... __u)
-        _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
-        : __base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
-                    typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
-                    typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
-                    typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
-                    _VSTD::forward<_Up>(__u)...) {}
-
-    template <class ..._Up, __enable_if_t<
-        _And<
-            _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
-            _EnableUTypesCtor<_Up...>,
-            _Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
+            _EnableUTypesCtor<_Up...>
+// nvcc 12.2 cannot choose between tuple(const T& ... t) and tuple(U&&... u)
+// so we have to added an explicit requires in enable_if
+#ifdef __CUDACC__
+            ,
+            _Not<_And<is_copy_constructible<_Tp>..., _Lazy<_And, is_convertible<_Up, const _Tp&>...>> >
+#endif
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(_Up&&... __u)
+    explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(_Up&&... __u)
         _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
         : __base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
                     typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
@@ -757,28 +690,11 @@ public:
     template <class _Alloc, class ..._Up, __enable_if_t<
         _And<
             _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
-            _EnableUTypesCtor<_Up...>,
-            is_convertible<_Up, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
-        : __base_(allocator_arg_t(), __a,
-                    typename __make_tuple_indices<sizeof...(_Up)>::type(),
-                    typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
-                    typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
-                    typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
-                    _VSTD::forward<_Up>(__u)...) {}
-
-    template <class _Alloc, class ..._Up, __enable_if_t<
-        _And<
-            _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
-            _EnableUTypesCtor<_Up...>,
-            _Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
+            _EnableUTypesCtor<_Up...>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
+    explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
         : __base_(allocator_arg_t(), __a,
                     typename __make_tuple_indices<sizeof...(_Up)>::type(),
                     typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
@@ -833,47 +749,22 @@ public:
 
     template <class ..._Up, __enable_if_t<
         _And<
-            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>,
-            is_convertible<const _Up&, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(const tuple<_Up...>& __t)
-        _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, const _Up&>...>::value))
-        : __base_(__t)
-    { }
-
-    template <class ..._Up, __enable_if_t<
-        _And<
-            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>,
-            _Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> > // explicit check
+            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(const tuple<_Up...>& __t)
+    explicit(_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> >::value) tuple(const tuple<_Up...>& __t)
         _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, const _Up&>...>::value))
         : __base_(__t)
     { }
 
     template <class ..._Up, class _Alloc, __enable_if_t<
         _And<
-            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>,
-            is_convertible<const _Up&, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t)
-        : __base_(allocator_arg_t(), __a, __t)
-    { }
-
-    template <class ..._Up, class _Alloc, __enable_if_t<
-        _And<
-            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>,
-            _Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> > // explicit check
+            _EnableCtorFromUTypesTuple<const tuple<_Up...>&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t)
+    explicit(_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t)
         : __base_(allocator_arg_t(), __a, __t)
     { }
 
@@ -894,50 +785,24 @@ public:
 #endif // _LIBCPP_STD_VER >= 23
 
     // tuple(tuple<U...>&&) constructors (including allocator_arg_t variants)
-
-    template <class ..._Up, __enable_if_t<
-        _And<
-            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>,
-            is_convertible<_Up, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(tuple<_Up...>&& __t)
-        _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
-        : __base_(_VSTD::move(__t))
-    { }
-
     template <class ..._Up, __enable_if_t<
         _And<
-            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>,
-            _Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
+            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(tuple<_Up...>&& __t)
+    explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(tuple<_Up...>&& __t)
         _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
         : __base_(_VSTD::move(__t))
     { }
 
     template <class _Alloc, class ..._Up, __enable_if_t<
         _And<
-            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>,
-            is_convertible<_Up, _Tp>... // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t)
-        : __base_(allocator_arg_t(), __a, _VSTD::move(__t))
-    { }
-
-    template <class _Alloc, class ..._Up, __enable_if_t<
-        _And<
-            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>,
-            _Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
+            _EnableCtorFromUTypesTuple<tuple<_Up...>&&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t)
+    explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t)
         : __base_(allocator_arg_t(), __a, _VSTD::move(__t))
     { }
 
@@ -986,47 +851,22 @@ public:
 
     template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
         _And<
-            _EnableCtorFromPair<const pair<_Up1, _Up2>&>,
-            _BothImplicitlyConvertible<const pair<_Up1, _Up2>&> // explicit check
+            _EnableCtorFromPair<const pair<_Up1, _Up2>&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(const pair<_Up1, _Up2>& __p)
-        _NOEXCEPT_((_NothrowConstructibleFromPair<const pair<_Up1, _Up2>&>::value))
-        : __base_(__p)
-    { }
-
-    template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _EnableCtorFromPair<const pair<_Up1, _Up2>&>,
-            _Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> > // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(const pair<_Up1, _Up2>& __p)
+    explicit(_Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> >::value) tuple(const pair<_Up1, _Up2>& __p)
         _NOEXCEPT_((_NothrowConstructibleFromPair<const pair<_Up1, _Up2>&>::value))
         : __base_(__p)
     { }
 
     template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
         _And<
-            _EnableCtorFromPair<const pair<_Up1, _Up2>&>,
-            _BothImplicitlyConvertible<const pair<_Up1, _Up2>&> // explicit check
+            _EnableCtorFromPair<const pair<_Up1, _Up2>&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p)
-        : __base_(allocator_arg_t(), __a, __p)
-    { }
-
-    template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _EnableCtorFromPair<const pair<_Up1, _Up2>&>,
-            _Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> > // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p)
+    explicit(_Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> >::value) tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p)
         : __base_(allocator_arg_t(), __a, __p)
     { }
 
@@ -1050,47 +890,22 @@ public:
 
     template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
         _And<
-            _EnableCtorFromPair<pair<_Up1, _Up2>&&>,
-            _BothImplicitlyConvertible<pair<_Up1, _Up2>&&> // explicit check
+            _EnableCtorFromPair<pair<_Up1, _Up2>&&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    tuple(pair<_Up1, _Up2>&& __p)
-        _NOEXCEPT_((_NothrowConstructibleFromPair<pair<_Up1, _Up2>&&>::value))
-        : __base_(_VSTD::move(__p))
-    { }
-
-    template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _EnableCtorFromPair<pair<_Up1, _Up2>&&>,
-            _Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> > // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-    explicit tuple(pair<_Up1, _Up2>&& __p)
+    explicit(_Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> >::value) tuple(pair<_Up1, _Up2>&& __p)
         _NOEXCEPT_((_NothrowConstructibleFromPair<pair<_Up1, _Up2>&&>::value))
         : __base_(_VSTD::move(__p))
     { }
 
     template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
         _And<
-            _EnableCtorFromPair<pair<_Up1, _Up2>&&>,
-            _BothImplicitlyConvertible<pair<_Up1, _Up2>&&> // explicit check
+            _EnableCtorFromPair<pair<_Up1, _Up2>&&>
         >::value
     , int> = 0>
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p)
-        : __base_(allocator_arg_t(), __a, _VSTD::move(__p))
-    { }
-
-    template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
-        _And<
-            _EnableCtorFromPair<pair<_Up1, _Up2>&&>,
-            _Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> > // explicit check
-        >::value
-    , int> = 0>
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-    explicit tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p)
+    explicit(_Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> >::value) tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p)
         : __base_(allocator_arg_t(), __a, _VSTD::move(__p))
     { }
 
@@ -1111,6 +926,8 @@ public:
         : __base_(allocator_arg_t(), __alloc, std::move(__p)) {}
 #endif // _LIBCPP_STD_VER >= 23
 
+_LIBCPP_DIAGNOSTIC_POP
+
     // [tuple.assign]
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
     tuple& operator=(_If<_And<is_copy_assignable<_Tp>...>::value, tuple, __nat> const& __tuple)