Function withVisitedTracking

packages/effect/src/Equal.ts:205–225

Helper to run comparison with proper visited tracking

(
  self: object,
  that: object,
  fn: () => boolean
)

/** Helper to run comparison with proper visited tracking */
function withVisitedTracking(
  self: object,
  that: object,
  fn: () => boolean
): boolean {
  const hasLeft = visitedLeft.has(self)
  const hasRight = visitedRight.has(that)
  // Check for circular references before adding
  if (hasLeft && hasRight) {
    return true // Both are circular at the same level
  }
  if (hasLeft || hasRight) {
    return false // Only one is circular
  }
  visitedLeft.add(self)
  visitedRight.add(that)
  const result = fn()
  visitedLeft.delete(self)
  visitedRight.delete(that)
  return result
}

const visitedLeft = new WeakSet<object>()
const visitedRight = new WeakSet<object>()