Initial commit

packages/core-shared/src/instrumentation/reported-flag.ts

@@ -0,0 +1,24 @@
+// Non-enumerable flag used by every ILogger implementation to skip
+// already-reported errors. The flag is non-enumerable so JSON.stringify
+// and {...err} spread won't surface it.
+
+const REPORTED = "__sentryReported" as const;
+
+export function isReported(err: unknown): boolean {
+  return (
+    err !== null &&
+    typeof err === "object" &&
+    Boolean((err as Record<string, unknown>)[REPORTED])
+  );
+}
+
+export function markReported(err: unknown): void {
+  if (err !== null && typeof err === "object" && !isReported(err)) {
+    Object.defineProperty(err, REPORTED, {
+      value: true,
+      enumerable: false,
+      configurable: false,
+      writable: false,
+    });
+  }
+}