/**
 * date-restrict - predicates for calendar constraints: min/max bounds,
 * `restrictedDates` (non-selectable), and `importantDates` (highlighted but
 * still selectable). Mirrors Smart's calendar constraint model. Framework-free.
 */
import { type DateLike } from './date-core';
export type RestrictOptions = {
    min?: DateLike | null;
    max?: DateLike | null;
    /** Individual dates (or predicate) that cannot be selected. */
    restrictedDates?: ReadonlyArray<DateLike> | ((d: Date) => boolean) | null;
};
/** True when `d` is outside the inclusive [min, max] day range. */
export declare function isOutOfRange(d: Date, min?: DateLike | null, max?: DateLike | null): boolean;
/** True when `d` is explicitly restricted (by list membership or predicate). */
export declare function isRestricted(d: Date, restrictedDates?: ReadonlyArray<DateLike> | ((day: Date) => boolean) | null): boolean;
/**
 * True when `d` cannot be selected: out of [min, max] OR restricted. This is
 * the single predicate the calendar/pickers use to disable a day.
 */
export declare function isDisabledDay(d: Date, opts: RestrictOptions): boolean;
/** True when `d` is flagged important (highlighted). Never affects selectability. */
export declare function isImportant(d: Date, importantDates?: ReadonlyArray<DateLike> | ((day: Date) => boolean) | null): boolean;