================
@@ -12,16 +12,25 @@
#include "clang/AST/Comment.h"
#include "clang/Index/USRGeneration.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/Support/Error.h"
+#include "llvm/Support/Mutex.h"
+#include <unordered_set>
namespace clang {
namespace doc {
+
+static std::unordered_set<std::string> USRVisited;
+
+static llvm::sys::Mutex USRVisitedGuard;
+
+
+
----------------
ilovepi wrote:
nit: extra newlines
https://github.com/llvm/llvm-project/pull/96809
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