[libcxx-commits] [libcxx] [libc++] Implement LWG4406: value_or return statement is inconsistent with Mandates (PR #189568)

[William Tran-Viet via libcxx-commits]

================
@@ -49,6 +49,19 @@ constexpr bool test() {
     assert(x == 10);
   }
 
+  // LWG3424: return type is remove_cv_t<T>
+  {
+    const std::expected<const int, int> e(5);
----------------
smallp-o-p wrote:

Pedantically, we should also test for `const volatile T`, `volatile T`.

https://github.com/llvm/llvm-project/pull/189568