[libcxx-commits] [libcxx] [libc++] Implement P2988R12: `std::optional<T&>` (PR #155202)

[William Tran-Viet via libcxx-commits]

================
@@ -919,20 +937,38 @@ public:
     return std::move(this->__get());
   }
 
-  template <class _Up>
+  template <class _Up = remove_cv_t<_Tp>>
----------------
smallp-o-p wrote:

Here it is: https://github.com/llvm/llvm-project/pull/155356

https://github.com/llvm/llvm-project/pull/155202