intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 94 insertions, 0 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__utility/integer_sequence.h b/contrib/libs/cxxsupp/libcxx/include/__utility/integer_sequence.h
new file mode 100644
index 00000000000..141f230763a
--- /dev/null
+++ b/contrib/libs/cxxsupp/libcxx/include/__utility/integer_sequence.h
@@ -0,0 +1,94 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_INTEGER_SEQUENCE_H
+#define _LIBCPP___UTILITY_INTEGER_SEQUENCE_H
+
+#include <__config>
+#include <type_traits>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 11
+
+template<class _Tp, _Tp... _Ip>
+struct _LIBCPP_TEMPLATE_VIS integer_sequence
+{
+    typedef _Tp value_type;
+    static_assert( is_integral<_Tp>::value,
+                  "std::integer_sequence can only be instantiated with an integral type" );
+    static
+    _LIBCPP_INLINE_VISIBILITY
+    constexpr
+    size_t
+    size() noexcept { return sizeof...(_Ip); }
+};
+
+template<size_t... _Ip>
+    using index_sequence = integer_sequence<size_t, _Ip...>;
+
+#if __has_builtin(__make_integer_seq) && !defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE)
+
+template <class _Tp, _Tp _Ep>
+using __make_integer_sequence _LIBCPP_NODEBUG = __make_integer_seq<integer_sequence, _Tp, _Ep>;
+
+#else
+
+template <class _Tp, class _T> struct __integer_sequence_convert {
+    using type = integer_sequence<_Tp>;
+};
+
+template<class _Tp, class _Tp2, _Tp... _Values>
+struct __integer_sequence_convert<_Tp, __integer_sequence<_Tp2, _Values...>> {
+    using type = integer_sequence<_Tp, _Values...>;
+};
+
+template<typename _Tp, _Tp _Np> using __make_integer_sequence_unchecked _LIBCPP_NODEBUG =
+  typename __integer_sequence_convert<_Tp, typename __detail::__make<_Np>::type>::type;
+
+template <class _Tp, _Tp _Ep>
+struct __make_integer_sequence_checked
+{
+    static_assert(is_integral<_Tp>::value,
+                  "std::make_integer_sequence can only be instantiated with an integral type" );
+    static_assert(0 <= _Ep, "std::make_integer_sequence must have a non-negative sequence length");
+#ifdef _LIBCPP_COMPILER_MSVC
+#pragma warning ( push )
+#pragma warning ( disable : 4296 )
+#endif
+    // Workaround GCC bug by preventing bad installations when 0 <= _Ep
+    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68929
+    typedef _LIBCPP_NODEBUG __make_integer_sequence_unchecked<_Tp, 0 <= _Ep ? _Ep : 0> type;
+#ifdef _LIBCPP_COMPILER_MSVC
+#pragma warning ( pop )
+#endif
+};
+
+template <class _Tp, _Tp _Ep>
+using __make_integer_sequence _LIBCPP_NODEBUG = typename __make_integer_sequence_checked<_Tp, _Ep>::type;
+
+#endif
+
+template<class _Tp, _Tp _Np>
+    using make_integer_sequence = __make_integer_sequence<_Tp, _Np>;
+
+template<size_t _Np>
+    using make_index_sequence = make_integer_sequence<size_t, _Np>;
+
+template<class... _Tp>
+    using index_sequence_for = make_index_sequence<sizeof...(_Tp)>;
+
+#endif // _LIBCPP_STD_VER > 11
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___UTILITY_INTEGER_SEQUENCE_H