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export type FSMLifecycleFn<StatesT extends string, EventsT extends string> = (meta: LifecycleFnMeta<StatesT, EventsT>) => void;
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export type LifecycleFnMeta<StatesT extends string, EventsT extends string> = {
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from: StatesT | null;
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to: StatesT;
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event: EventsT | null;
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args: unknown;
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};
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export declare function isLifecycleFnMeta<StatesT extends string, EventsT extends string>(meta: unknown): meta is LifecycleFnMeta<StatesT, EventsT>;
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export type FSMLifecycle = "_enter" | "_exit";
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export type ActionFn<StatesT> = (...args: unknown[]) => StatesT | void;
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export type Action<StatesT> = StatesT | ActionFn<StatesT>;
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export type StateHandler<StatesT extends string, EventsT extends string> = {
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[e in EventsT]?: Action<StatesT>;
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} & {
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[k in FSMLifecycle]?: FSMLifecycleFn<StatesT, EventsT>;
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};
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export type Transition<StatesT extends string, EventsT extends string> = {
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[s in StatesT]: StateHandler<StatesT, EventsT>;
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} & {
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"*"?: StateHandler<StatesT, EventsT>;
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};
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/**
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* Defines a strongly-typed finite state machine.
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*
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* @see {@link https://runed.dev/docs/utilities/finite-state-machine}
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*/
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export declare class FiniteStateMachine<StatesT extends string, EventsT extends string> {
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#private;
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readonly states: Transition<StatesT, EventsT>;
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constructor(initial: StatesT, states: Transition<StatesT, EventsT>);
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/** Triggers a new event and returns the new state. */
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send(event: EventsT, ...args: unknown[]): StatesT;
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/** Debounces the triggering of an event. */
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debounce(wait: number | undefined, event: EventsT, ...args: unknown[]): Promise<StatesT>;
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/** The current state. */
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get current(): StatesT;
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}
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