[clang] [Clang][Sema] Reject array prvalue operands (PR #140702)

[via cfe-commits]

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@@ -7639,6 +7639,8 @@ def warn_param_mismatched_alignment : Warning<
 
 def err_objc_object_assignment : Error<
   "cannot assign to class object (%0 invalid)">;
+def err_typecheck_array_prvalue_operand : Error<
+  "array prvalue is not permitted">;
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Sirraide wrote:

```suggestion
  "operand of '%0' cannot be an array prvalue">;
```
I think it’s a bit clearer if we phrase it like this and also print out the operator rather than just saying ‘X is not permitted’.

https://github.com/llvm/llvm-project/pull/140702