[libcxx-commits] [libcxx] WIP - [libc++][functional] P2944R3 (partial): Comparisons for ``reference_wrapper`` (``reference_wrapper`` operators only) (PR #88384)

[Mark de Wever via libcxx-commits]

================
@@ -64,6 +67,62 @@ class _LIBCPP_TEMPLATE_VIS reference_wrapper : public __weak_result_type<_Tp> {
   {
     return std::__invoke(get(), std::forward<_ArgTypes>(__args)...);
   }
+
+#if _LIBCPP_STD_VER >= 26
+
+  // [refwrap.comparisons], comparisons
+
+  friend constexpr bool operator==(reference_wrapper __x, reference_wrapper __y)
----------------
mordante wrote:

Here and the other friends.
```suggestion
_LIBCPP_HIDE_FROM_ABI  friend constexpr bool operator==(reference_wrapper __x, reference_wrapper __y)
```

https://github.com/llvm/llvm-project/pull/88384