[clang-tools-extra] [clang-tidy] Fix `cppcoreguidelines-use-enum-class` anonymous enum bug (PR #215352)

[Yanzuo Liu via cfe-commits]

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@@ -10,6 +10,14 @@
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 
 using namespace clang::ast_matchers;
+using namespace clang::ast_matchers::internal;
+
+namespace {
+// FIXME: The matcher 'hasName(Name)' asserts that its argument 'Name' is
+// nonempty. Perhaps remove that assertion and replace 'isUnnamed()' with
+// 'hasName("")'.
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zwuis wrote:

Should we? How do we handle special names making `getName` return empty strings, for **other** derived classes of `NamedDecl`?

https://github.com/llvm/llvm-project/pull/215352