import { Observable } from 'rxjs';
import { IValidator, ValidatorContext } from '..';
/**
 * 条件校验，条件函数返回true时才会执行校验，否则直接视为校验通过
 * @param condition
 */
export declare function when<V = unknown>(condition: (ctx: ValidatorContext<V>) => boolean): (validator: IValidator<V>) => IValidator<V>;
/**
 * ValidatorMiddlewares.when的异步版本，接收异步的条件函数
 * @param condition
 */
export declare function whenAsync<V = unknown>(condition: (formValue: ValidatorContext<V>) => Promise<boolean> | Observable<boolean>): (validator: IValidator<V>) => import("..").IAsyncValidator<V>;
//# sourceMappingURL=when.d.ts.map