import type { BreadcrumbSegment, NavConfig, NavStackEntry } from './types';
export interface MatchNavResult {
    navStack: NavStackEntry[];
    breadcrumbSegments: BreadcrumbSegment[];
    activeItemId: string | null;
}
/**
 * Pure function. Matches pathname against nav config.
 *
 * - `link` → single URL segment (`{path}`)
 * - `drill` → segment + dynamic param (`{path}/:param/...`), pushes new stack level
 * - `group` → NO URL segment, children promoted to parent level
 *
 * Called via useMemo on every pathname change.
 */
export declare const matchNav: (pathname: string, config: NavConfig) => MatchNavResult;