Function prettyErrorMessage

packages/effect/src/internal/cause.ts:949–973

(u: unknown)

 * @internal
 */
export const prettyErrorMessage = (u: unknown): string => {
  // 1)
  if (typeof u === "string") {
    return u
  }
  // 2)
  if (typeof u === "object" && u !== null && u instanceof Error) {
    return u.message
  }
  // 3)
  try {
    if (
      hasProperty(u, "toString") &&
      isFunction(u["toString"]) &&
      u["toString"] !== Object.prototype.toString &&
      u["toString"] !== globalThis.Array.prototype.toString
    ) {
      return u["toString"]()
    }
  } catch {
    // something's off, rollback to json
  }
  // 4)
  return stringifyCircular(u)
}

const locationRegex = /\((.*)\)/g