/**
 * Rust Language Index Module
 *
 * Provides Rust-aware code search using:
 * - AST parsing via tree-sitter (with regex fallback)
 * - Local text embeddings for semantic similarity
 * - BM25 keyword matching for fast filtering
 *
 * Supported file types: .rs
 *
 * Index location: .raggrep/index/language/rust/
 */
import { IndexModule, IndexContext, SearchContext, SearchOptions, FileIndex, SearchResult, ModuleConfig } from "../../../types";
/** Default minimum similarity score for search results */
export declare const DEFAULT_MIN_SCORE = 0.15;
/** Default number of results to return */
export declare const DEFAULT_TOP_K = 10;
/** File extensions supported by this module */
export declare const RUST_EXTENSIONS: string[];
/**
 * Check if a file is supported by this module.
 */
export declare function isRustFile(filepath: string): boolean;
export declare const supportsFile: typeof isRustFile;
/**
 * Module-specific data stored alongside file index.
 */
export interface RustModuleData {
    embeddings: number[][];
    embeddingModel: string;
    [key: string]: unknown;
}
export declare class RustModule implements IndexModule {
    readonly id = "language/rust";
    readonly name = "Rust Search";
    readonly description = "Rust-aware code search with AST parsing and semantic embeddings";
    readonly version = "1.0.0";
    supportsFile(filepath: string): boolean;
    private embeddingConfig;
    private symbolicIndex;
    private literalIndex;
    private pendingSummaries;
    private pendingLiterals;
    private rootDir;
    private logger;
    initialize(config: ModuleConfig): Promise<void>;
    indexFile(filepath: string, content: string, ctx: IndexContext): Promise<FileIndex | null>;
    /**
     * Regex-based fallback parser for Rust.
     */
    private parseRustRegex;
    /**
     * Create file index from parsed chunks.
     */
    private createFileIndex;
    finalize(ctx: IndexContext): Promise<void>;
    search(query: string, ctx: SearchContext, options?: SearchOptions): Promise<SearchResult[]>;
}