import { ValidatorFn } from '@angular/forms';
import { DateValue } from '@internationalized/date';
/**
 * Validator for a DateValue to be within a range (closed or open).
 * Can also be used to validate a RangeValue<DateValue> against a range.
 */
export declare function createDateRangeValidator({ minValue, maxValue, }: {
    minValue?: DateValue;
    maxValue?: DateValue;
}): ValidatorFn;
/**
 * Custom validator to determine if a value is valid or not.
 * Can also be used to validate a RangeValue<DateValue>. In
 * such case both the start and end dates must pass validation.
 */
export declare function createCustomDateValidator({ isDateUnavailable, }: {
    isDateUnavailable?: (value: DateValue) => boolean;
}): ValidatorFn;
/**
 * Validator for controls that work with a value of type RangeValue<DateValue>.
 * This validates that the date range is not absurd (eg. start date is after
 * end date).
 */
export declare function createDateRangeSanityValidator(): ValidatorFn;