[clang] [clang] Add test for CWG110 "Can template functions and classes be declared in the same scope?" (PR #111446)

[Vlad Serebrennikov via cfe-commits]

================
@@ -119,6 +119,16 @@ namespace cwg109 { // cwg109: yes
   };
 }
 
+namespace cwg110 { // cwg110: 2.8
+template <typename>
+void f();
+
+class f;
+
+template <typename>
+void f(int);
+} // namespace cwg110
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Endilll wrote:

I updated the test. Does it look good now?

https://github.com/llvm/llvm-project/pull/111446