import { Cancellation, FileSystemNode, FileSystemProvider, URI } from "langium";
/**
 * Represents the result of visiting a file or directory during traversal.
 */
type WalkFolderResult = void | {
    /** If true, the traversal should stop immediately. */
    break?: boolean;
    /** If true, the current directory should be skipped (only applicable to onDir). */
    skipDir?: boolean;
};
/** Defines the visitor functions to be called during directory traversal. */
type WalkFolderVisitor = {
    /**
     * Called for each file encountered.
     * @param file The URI of the file.
     * @returns A WalkFolderResult to control traversal.
     */
    File?: (file: URI) => Promise<WalkFolderResult> | WalkFolderResult;
    /**
     * Called for each directory encountered.
     * @param dir The URI of the directory.
     * @param entries The entries (files and subdirectories) within the directory.
     * @returns A WalkFolderResult to control traversal.
     */
    Dir?: (dir: URI, entries: FileSystemNode[]) => Promise<WalkFolderResult> | WalkFolderResult;
};
/**
 * Traverses a directory asynchronously, applying visitor functions to files and directories.
 * @param svcs The shared services containing the file system provider.
 * @param location The starting URI of the directory to traverse.
 * @param visitor The visitor object with optional onFile and onDir methods.
 * @param cancel A cancellation token to stop the traversal.
 * @returns A Promise that resolves when the traversal is complete or cancelled.
 */
export declare function WalkDirectory(fs: FileSystemProvider, location: URI, visitor: WalkFolderVisitor, cancel?: Cancellation.CancellationToken): Promise<void>;
export {};