[clang] [Clang][Sema] Mark decomposition decl invalid for explicit array type (PR #210964)

[Shengxin Pei via cfe-commits]

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@@ -229,4 +229,13 @@ namespace by_value_array_copy {
     auto [d] = T{};
   }
 
+  // A structured binding cannot be declared with an explicit array type: the
+  // array type it binds to is deduced from the initializer. Such an ill-formed
+  // declaration must not be initialized, so only one error is expected here.
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TPPPP72 wrote:

I think these comments are unnecessary; of course, we should hear @cor3ntin opinion on the matter.

https://github.com/llvm/llvm-project/pull/210964