32 lines
1.5 KiB
TypeScript
32 lines
1.5 KiB
TypeScript
type SetStateInternal<T> = {
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_(partial: T | Partial<T> | {
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_(state: T): T | Partial<T>;
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}['_'], replace?: false): void;
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_(state: T | {
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_(state: T): T;
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}['_'], replace: true): void;
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}['_'];
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export interface StoreApi<T> {
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setState: SetStateInternal<T>;
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getState: () => T;
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getInitialState: () => T;
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subscribe: (listener: (state: T, prevState: T) => void) => () => void;
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}
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export type ExtractState<S> = S extends {
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getState: () => infer T;
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} ? T : never;
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type Get<T, K, F> = K extends keyof T ? T[K] : F;
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export type Mutate<S, Ms> = number extends Ms['length' & keyof Ms] ? S : Ms extends [] ? S : Ms extends [[infer Mi, infer Ma], ...infer Mrs] ? Mutate<StoreMutators<S, Ma>[Mi & StoreMutatorIdentifier], Mrs> : never;
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export type StateCreator<T, Mis extends [StoreMutatorIdentifier, unknown][] = [], Mos extends [StoreMutatorIdentifier, unknown][] = [], U = T> = ((setState: Get<Mutate<StoreApi<T>, Mis>, 'setState', never>, getState: Get<Mutate<StoreApi<T>, Mis>, 'getState', never>, store: Mutate<StoreApi<T>, Mis>) => U) & {
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$$storeMutators?: Mos;
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};
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export interface StoreMutators<S, A> {
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}
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export type StoreMutatorIdentifier = keyof StoreMutators<unknown, unknown>;
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type CreateStore = {
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<T, Mos extends [StoreMutatorIdentifier, unknown][] = []>(initializer: StateCreator<T, [], Mos>): Mutate<StoreApi<T>, Mos>;
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<T>(): <Mos extends [StoreMutatorIdentifier, unknown][] = []>(initializer: StateCreator<T, [], Mos>) => Mutate<StoreApi<T>, Mos>;
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};
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export declare const createStore: CreateStore;
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export {};
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