[clang] [clang] Implement __attribute__((format_matches)) (PR #116708)

[Erich Keane via cfe-commits]

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@@ -292,7 +292,7 @@ class ArgType {
   };
 
 private:
-  const Kind K;
+  Kind K;
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erichkeane wrote:

Oh? Is this necessary?

https://github.com/llvm/llvm-project/pull/116708