Function withVisitedTracking

packages/effect/src/Hash.ts:508–516

(obj: object, fn: () => T)

const visitedObjects = new WeakSet<object>()

function withVisitedTracking<T>(obj: object, fn: () => T): T {
  if (visitedObjects.has(obj)) {
    return string("[Circular]") as T
  }
  visitedObjects.add(obj)
  const result = fn()
  visitedObjects.delete(obj)
  return result
}