[clang] [Clang] disallow attributes on void parameters (PR #124920)

[via cfe-commits]

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@@ -7986,6 +7986,13 @@ void Parser::ParseParameterDeclarationClause(
     if (getLangOpts().HLSL)
       MaybeParseHLSLAnnotations(DS.getAttributes());
 
+    if (ParmDeclarator.getIdentifier() == nullptr &&
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cor3ntin wrote:

I don't think checking checking for an identifier makes sense, the type is enough

https://github.com/llvm/llvm-project/pull/124920