1 files changed, 59 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__utility/swap.h b/contrib/llvm-project/libcxx/include/__utility/swap.h
new file mode 100644
index 000000000000..ab88b8e0a0b5
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__utility/swap.h
@@ -0,0 +1,59 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_SWAP_H
+#define _LIBCPP___UTILITY_SWAP_H
+
+#include <__config>
+#include <__type_traits/is_assignable.h>
+#include <__type_traits/is_constructible.h>
+#include <__type_traits/is_nothrow_assignable.h>
+#include <__type_traits/is_nothrow_constructible.h>
+#include <__type_traits/is_swappable.h>
+#include <__utility/declval.h>
+#include <__utility/move.h>
+#include <cstddef>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#ifndef _LIBCPP_CXX03_LANG
+template <class _Tp>
+using __swap_result_t = __enable_if_t<is_move_constructible<_Tp>::value && is_move_assignable<_Tp>::value>;
+#else
+template <class>
+using __swap_result_t = void;
+#endif
+
+template <class _Tp>
+inline _LIBCPP_HIDE_FROM_ABI __swap_result_t<_Tp> _LIBCPP_CONSTEXPR_SINCE_CXX20 swap(_Tp& __x, _Tp& __y)
+    _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value&& is_nothrow_move_assignable<_Tp>::value) {
+  _Tp __t(std::move(__x));
+  __x = std::move(__y);
+  __y = std::move(__t);
+}
+
+template <class _Tp, size_t _Np, __enable_if_t<__is_swappable_v<_Tp>, int> >
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np])
+    _NOEXCEPT_(__is_nothrow_swappable_v<_Tp>) {
+  for (size_t __i = 0; __i != _Np; ++__i) {
+    swap(__a[__i], __b[__i]);
+  }
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___UTILITY_SWAP_H