type Getter = {
    <Value>(atom: Atom<Value | Promise<Value>>): Value;
    <Value>(atom: Atom<Promise<Value>>): Value;
    <Value>(atom: Atom<Value>): Awaited<Value>;
};
type WriteGetter = Getter & {
    <Value>(atom: Atom<Value | Promise<Value>>, options: {
        unstable_promise: true;
    }): Promise<Value> | Value;
    <Value>(atom: Atom<Promise<Value>>, options: {
        unstable_promise: true;
    }): Promise<Value> | Value;
    <Value>(atom: Atom<Value>, options: {
        unstable_promise: true;
    }): Promise<Awaited<Value>> | Awaited<Value>;
};
type Setter = {
    <Value, Result extends void | Promise<void>>(atom: WritableAtom<Value, undefined, Result>): Result;
    <Value, Update, Result extends void | Promise<void>>(atom: WritableAtom<Value, Update, Result>, update: Update): Result;
};
type Read<Value> = (get: Getter) => Value;
type Write<Update, Result extends void | Promise<void>> = (get: WriteGetter, set: Setter, update: Update) => Result;
type WithInitialValue<Value> = {
    init: Value;
};
export type SetAtom<Update, Result extends void | Promise<void>> = undefined extends Update ? (update?: Update) => Result : (update: Update) => Result;
type OnUnmount = () => void;
type OnMount<Update, Result extends void | Promise<void>> = <S extends SetAtom<Update, Result>>(setAtom: S) => OnUnmount | void;
export interface Atom<Value> {
    toString: () => string;
    debugLabel?: string;
    read: Read<Value>;
}
export interface WritableAtom<Value, Update, Result extends void | Promise<void> = void> extends Atom<Value> {
    write: Write<Update, Result>;
    onMount?: OnMount<Update, Result>;
}
type SetStateAction<Value> = Value | ((prev: Value) => Value);
export type PrimitiveAtom<Value> = WritableAtom<Value, SetStateAction<Value>>;
export declare function atom<Value, Update, Result extends void | Promise<void> = void>(read: Read<Value>, write: Write<Update, Result>): WritableAtom<Value, Update, Result>;
export declare function atom<Value>(read: Read<Value>): Atom<Value>;
export declare function atom(invalidFunction: (...args: any) => any, write?: any): never;
export declare function atom<Value, Update, Result extends void | Promise<void> = void>(initialValue: Value, write: Write<Update, Result>): WritableAtom<Value, Update, Result> & WithInitialValue<Value>;
export declare function atom<Value>(initialValue: Value): PrimitiveAtom<Value> & WithInitialValue<Value>;
export {};