import type { NeverType } from '../never/never_type.js';
import type { KeyTypes } from '../object/KeyTypes.js';
import type { Tail } from './tail.js';
/**
 * ⚗️ *transform*
 * 🔢 *customization*
 *
 * Gets the common property keys of the elements in tuple `T`.
 *
 * @example
 * ```ts
 * import { type TuplePlus } from 'type-plus'
 *
 * type R = TuplePlus.CommonPropKeys<[{ a: number }, { b: number }]> // never
 * type R = TuplePlus.CommonPropKeys<[{ a: number, c: 1 }, { b: number, c: 2 }]> // 'c'
 * ```
 *
 * @typeParam Options['caseNever'] Return type when `T` is `never`.
 * Default to `never`.
 */
export type CommonPropKeys<T extends Record<KeyTypes, unknown>[], Options extends CommonPropKeys.Options = CommonPropKeys.DefaultOptions> = NeverType<T, Options['caseNever'], (T['length'] extends 0 ? never : (T['length'] extends 1 ? keyof T[0] : (T['length'] extends 2 ? keyof T[0] & keyof T[1] : keyof T[0] & keyof T[1] & CommonPropKeys<Tail<Tail<T>>>)))>;
export declare namespace CommonPropKeys {
    interface Options extends NeverType.Options {
    }
    interface DefaultOptions extends NeverType.DefaultOptions {
    }
}
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