libstdc++: Remove unused functions in std::variant implementation

These functions aren't used, and accessing the storage as a void* isn't
compatible with C++20 constexpr requirements anyway, so we're unlikely
to ever start using them in future.

libstdc++-v3/ChangeLog:

	* include/std/variant (_Variant_storage::_M_storage()): Remove.
	(__detail::__variant::__get_storage): Remove.
	(variant): Remove friend declaration of __get_storage.

diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index b85a89d0b7bd74fa75a322f9146ea0b23e00b554..4a6826b7ba6aad6752b4adbd33d33ea68915f04d 100644 (file)
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -434,13 +434,6 @@ namespace __variant
       ~_Variant_storage()
       { _M_reset(); }
 
-      void*
-      _M_storage() const noexcept
-      {
-       return const_cast<void*>(static_cast<const void*>(
-           std::addressof(_M_u)));
-      }
-
       constexpr bool
       _M_valid() const noexcept
       {
@@ -472,13 +465,6 @@ namespace __variant
       void _M_reset() noexcept
       { _M_index = static_cast<__index_type>(variant_npos); }
 
-      void*
-      _M_storage() const noexcept
-      {
-       return const_cast<void*>(static_cast<const void*>(
-           std::addressof(_M_u)));
-      }
-
       constexpr bool
       _M_valid() const noexcept
       {
@@ -809,11 +795,6 @@ namespace __variant
     : _FUN_type<_Tp, _Variant>
     { };
 
-  // Returns the raw storage for __v.
-  template<typename _Variant>
-    void* __get_storage(_Variant&& __v) noexcept
-    { return __v._M_storage(); }
-
   template <typename _Maybe_variant_cookie, typename _Variant>
     struct _Extra_visit_slot_needed
     {
@@ -1690,10 +1671,6 @@ namespace __variant
        friend constexpr decltype(auto)
        __detail::__variant::__get(_Vp&& __v) noexcept;
 
-      template<typename _Vp>
-       friend void*
-       __detail::__variant::__get_storage(_Vp&& __v) noexcept;
-
 #define _VARIANT_RELATION_FUNCTION_TEMPLATE(__OP) \
       template<typename... _Tp> \
        friend constexpr bool \