[clang] [P3074] Partial implementation of support for trivial unions (PR #146815)

[Vlad Serebrennikov via cfe-commits]

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@@ -922,7 +922,7 @@ namespace cwg667 { // cwg667: 8
 
   struct B { ~B() = delete; };
   union C { B b; };
-  static_assert(!__is_trivially_destructible(C), "");
+  static_assert(!__is_trivially_destructible(C), ""); // cxx26-error {{failed}}
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Endilll wrote:

I think I want this static to be duplicated and put under `#if __cplusplus`, because we're not actually interested in "static_assert has failed" diagnostic. 

https://github.com/llvm/llvm-project/pull/146815