/**
 * Regex-based Symbol Extraction
 *
 * Extracts symbols from code using regular expressions.
 * Language-agnostic but optimized for common patterns.
 */
export type SymbolType = "function" | "class" | "variable" | "interface" | "type" | "enum" | "method" | "other";
export interface ExtractedSymbol {
    name: string;
    type: SymbolType;
    line: number;
    isExported: boolean;
}
/**
 * Extract symbols from code content using regex patterns.
 *
 * @param content - The source code content
 * @returns Array of extracted symbols with their locations
 */
export declare function extractSymbols(content: string): ExtractedSymbol[];
/**
 * Extract symbol names as keywords for BM25 indexing.
 *
 * @param symbols - Array of extracted symbols
 * @returns Array of unique symbol names
 */
export declare function symbolsToKeywords(symbols: ExtractedSymbol[]): string[];