[clang] [Clang] Diagnose defaulted assignment operator with incompatible object parameter (PR #70176)

[via cfe-commits]

================
@@ -7748,6 +7748,24 @@ bool Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD,
         HadError = true;
       }
     }
+    // [C++23][dcl.fct.def.default]/p2.2
----------------
cor3ntin wrote:

It applies to special member functions - Which excludes comparison. and constructors can't have an explicit object parameters

https://github.com/llvm/llvm-project/pull/70176