[libcxx-commits] [libcxx] [libc++] Fix ambiguity when using std::scoped_allocator constructor (PR #80261)

[Louis Dionne via libcxx-commits]

================
@@ -104,13 +104,20 @@ int main(int, char**) {
     assert(a.outer_allocator() == A1<int>(4));
     assert((a.inner_allocator() == std::scoped_allocator_adaptor<A2<int>, A3<int>>(A2<int>(5), A3<int>(6))));
   }
-  //  Test for LWG2782
   {
+    //  Test for LWG2782
     static_assert(!std::is_convertible<A1<int>, A2<int>>::value, "");
     static_assert(
         !std::is_convertible< std::scoped_allocator_adaptor<A1<int>>, std::scoped_allocator_adaptor<A2<int>>>::value,
         "");
   }
+  {
+    // Test construction from convertible-to-allocator types
----------------
ldionne wrote:

```suggestion
    // Test construction from convertible-to-allocator types (https://github.com/llvm/llvm-project/issues/78754)
```

https://github.com/llvm/llvm-project/pull/80261