/**
 * The `UNINITIALIZED` symbol represents a special internal value that can be used to differentiate
 * between any user-supplied value and the state of being uninitialized.
 *
 * You do not **need** to import `@starbeam/shared` to get this symbol, as it is specified using
 * `Symbol.for`.
 */
const UNINITIALIZED = Symbol.for("starbeam.UNINITIALIZED");
type UNINITIALIZED = typeof UNINITIALIZED;

/**
 * The `REACTIVE` symbol is the protocol entry point for reactive values. Implementations of
 * the `ReactiveProtocol` interface specify their reactive behavior under this symbol.
 */
const REACTIVE: unique symbol = Symbol.for("starbeam.REACTIVE");
type REACTIVE = typeof REACTIVE;

/**
 * The `NOW` symbol is the name on `globalThis` that is used to store the current timestamp.
 */
const COORDINATION: unique symbol = Symbol.for("starbeam.COORDINATION");
type COORDINATION = typeof COORDINATION;

export { COORDINATION, REACTIVE, UNINITIALIZED };