Update perfect_forward.h to make std::bind_front compile on Windows

This is a partial backport of [commit 5a4f177c](https://github.com/llvm/llvm-project/commit/5a4f177c949e5ff56bc6af9c0145e2d0c1b29c4d) from upstream.

1 files changed, 51 insertions, 52 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__functional/perfect_forward.h b/contrib/libs/cxxsupp/libcxx/include/__functional/perfect_forward.h
index 9acaa7e98f..9ffea1a8c7 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__functional/perfect_forward.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__functional/perfect_forward.h
@@ -25,63 +25,62 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if _LIBCPP_STD_VER > 14
 
-template <class _Op, class _Indices, class ..._Bound>
+template <class _Op, class _Indices, class... _BoundArgs>
 struct __perfect_forward_impl;
 
-template <class _Op, size_t ..._Idx, class ..._Bound>
-struct __perfect_forward_impl<_Op, index_sequence<_Idx...>, _Bound...> {
+template <class _Op, size_t... _Idx, class... _BoundArgs>
+struct __perfect_forward_impl<_Op, index_sequence<_Idx...>, _BoundArgs...> {
 private:
-    tuple<_Bound...> __bound_;
+  tuple<_BoundArgs...> __bound_args_;
 
 public:
-    template <class ..._BoundArgs, class = enable_if_t<
-        is_constructible_v<tuple<_Bound...>, _BoundArgs&&...>
-    >>
-    explicit constexpr __perfect_forward_impl(_BoundArgs&& ...__bound)
-        : __bound_(_VSTD::forward<_BoundArgs>(__bound)...)
-    { }
-
-    __perfect_forward_impl(__perfect_forward_impl const&) = default;
-    __perfect_forward_impl(__perfect_forward_impl&&) = default;
-
-    __perfect_forward_impl& operator=(__perfect_forward_impl const&) = default;
-    __perfect_forward_impl& operator=(__perfect_forward_impl&&) = default;
-
-    template <class ..._Args, class = enable_if_t<is_invocable_v<_Op, _Bound&..., _Args...>>>
-    _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) &
-        noexcept(noexcept(_Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...)))
-        -> decltype(      _Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...))
-        { return          _Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...); }
-
-    template <class ..._Args, class = enable_if_t<!is_invocable_v<_Op, _Bound&..., _Args...>>>
-    auto operator()(_Args&&...) & = delete;
-
-    template <class ..._Args, class = enable_if_t<is_invocable_v<_Op, _Bound const&..., _Args...>>>
-    _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) const&
-        noexcept(noexcept(_Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...)))
-        -> decltype(      _Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...))
-        { return          _Op()(_VSTD::get<_Idx>(__bound_)..., _VSTD::forward<_Args>(__args)...); }
-
-    template <class ..._Args, class = enable_if_t<!is_invocable_v<_Op, _Bound const&..., _Args...>>>
-    auto operator()(_Args&&...) const& = delete;
-
-    template <class ..._Args, class = enable_if_t<is_invocable_v<_Op, _Bound..., _Args...>>>
-    _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) &&
-        noexcept(noexcept(_Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...)))
-        -> decltype(      _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...))
-        { return          _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...); }
-
-    template <class ..._Args, class = enable_if_t<!is_invocable_v<_Op, _Bound..., _Args...>>>
-    auto operator()(_Args&&...) && = delete;
-
-    template <class ..._Args, class = enable_if_t<is_invocable_v<_Op, _Bound const..., _Args...>>>
-    _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) const&&
-        noexcept(noexcept(_Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...)))
-        -> decltype(      _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...))
-        { return          _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_))..., _VSTD::forward<_Args>(__args)...); }
-
-    template <class ..._Args, class = enable_if_t<!is_invocable_v<_Op, _Bound const..., _Args...>>>
-    auto operator()(_Args&&...) const&& = delete;
+  template <class... _Args, class = enable_if_t<
+    is_constructible_v<tuple<_BoundArgs...>, _Args&&...>
+  >>
+  explicit constexpr __perfect_forward_impl(_Args&&... __bound_args)
+    : __bound_args_(_VSTD::forward<_Args>(__bound_args)...) {}
+
+  __perfect_forward_impl(__perfect_forward_impl const&) = default;
+  __perfect_forward_impl(__perfect_forward_impl&&) = default;
+
+  __perfect_forward_impl& operator=(__perfect_forward_impl const&) = default;
+  __perfect_forward_impl& operator=(__perfect_forward_impl&&) = default;
+
+  template <class... _Args, class = enable_if_t<is_invocable_v<_Op, _BoundArgs&..., _Args...>>>
+  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) &
+    noexcept(noexcept(_Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...)))
+    -> decltype(      _Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...))
+    { return          _Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...); }
+
+  template <class... _Args, class = enable_if_t<!is_invocable_v<_Op, _BoundArgs&..., _Args...>>>
+  auto operator()(_Args&&...) & = delete;
+
+  template <class... _Args, class = enable_if_t<is_invocable_v<_Op, _BoundArgs const&..., _Args...>>>
+  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) const&
+    noexcept(noexcept(_Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...)))
+    -> decltype(      _Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...))
+    { return          _Op()(_VSTD::get<_Idx>(__bound_args_)..., _VSTD::forward<_Args>(__args)...); }
+
+  template <class... _Args, class = enable_if_t<!is_invocable_v<_Op, _BoundArgs const&..., _Args...>>>
+  auto operator()(_Args&&...) const& = delete;
+
+  template <class... _Args, class = enable_if_t<is_invocable_v<_Op, _BoundArgs..., _Args...>>>
+  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) &&
+    noexcept(noexcept(_Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...)))
+    -> decltype(      _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...))
+    { return          _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...); }
+
+  template <class... _Args, class = enable_if_t<!is_invocable_v<_Op, _BoundArgs..., _Args...>>>
+  auto operator()(_Args&&...) && = delete;
+
+  template <class... _Args, class = enable_if_t<is_invocable_v<_Op, _BoundArgs const..., _Args...>>>
+  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Args&&... __args) const&&
+    noexcept(noexcept(_Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...)))
+    -> decltype(      _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...))
+    { return          _Op()(_VSTD::get<_Idx>(_VSTD::move(__bound_args_))..., _VSTD::forward<_Args>(__args)...); }
+
+  template <class... _Args, class = enable_if_t<!is_invocable_v<_Op, _BoundArgs const..., _Args...>>>
+  auto operator()(_Args&&...) const&& = delete;
 };
 
 // __perfect_forward implements a perfect-forwarding call wrapper as explained in [func.require].