import { PageFileSystemRouter } from "./convention.ts";
/**
 * Maps a flat route file (relative to the route dir, extension stripped,
 * e.g. `/concerts.$city`) to a route path in the neutral pattern language,
 * or `undefined` for co-located files that are not routes.
 */
export declare function flatRoutePathFromFile(routeFile: string): string | undefined;
/**
 * `PageFileSystemRouter` with the flat filename convention. The module
 * convention is inherited unchanged — default export is a page, `route`
 * config export, `httpMethods` handlers, `components: false` — so the two
 * conventions are equally capable; only the filenames differ.
 */
export declare class FlatFileSystemRouter extends PageFileSystemRouter {
    toPath(src: string): string | undefined;
}