// copy from element-plus
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import type { CSSProperties, Plugin } from 'vue';
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type OptionalKeys<T extends Record<string, unknown>> = {
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[K in keyof T]: T extends Record<K, T[K]> ? never : K;
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}[keyof T];
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type RequiredKeys<T extends Record<string, unknown>> = Exclude<keyof T, OptionalKeys<T>>;
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type MonoArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg?: T[K]) => void;
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type BiArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg: T[K]) => void;
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export type EventEmitter<T extends Record<string, unknown>> = MonoArgEmitter<T, OptionalKeys<T>> &
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BiArgEmitter<T, RequiredKeys<T>>;
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export type AnyFunction<T> = (...args: any[]) => T;
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export type PartialReturnType<T extends (...args: unknown[]) => unknown> = Partial<ReturnType<T>>;
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export type SFCWithInstall<T> = T & Plugin;
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export type Nullable<T> = T | null;
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export type RefElement = Nullable<HTMLElement>;
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export type CustomizedHTMLElement<T> = HTMLElement & T;
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export type Indexable<T> = {
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[key: string]: T;
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};
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export type Hash<T> = Indexable<T>;
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export type TimeoutHandle = ReturnType<typeof global.setTimeout>;
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export type ComponentSize = 'large' | 'medium' | 'small' | 'mini';
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export type StyleValue = string | CSSProperties | Array<StyleValue>;
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export type Mutable<T> = { -readonly [P in keyof T]: T[P] };
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export type Merge<O extends object, T extends object> = {
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[K in keyof O | keyof T]: K extends keyof T ? T[K] : K extends keyof O ? O[K] : never;
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};
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/**
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* T = [
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* { name: string; age: number; },
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* { sex: 'male' | 'female'; age: string }
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* ]
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* =>
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* MergeAll<T> = {
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* name: string;
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* sex: 'male' | 'female';
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* age: string
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* }
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*/
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export type MergeAll<T extends object[], R extends object = {}> = T extends [
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infer F extends object,
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...infer Rest extends object[],
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]
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? MergeAll<Rest, Merge<R, F>>
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: R;
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