/**
 * Pie Chart Parser
 *
 * Uses @mermaid-js/parser (Langium-based) for parsing pie charts.
 * This is an async parser since Langium parsing is async.
 */
import type { PieAST } from '../types/pie.js';
/**
 * Detects if the input is a pie chart diagram
 */
export declare function isPieDiagram(input: string): boolean;
/**
 * Parses a Mermaid pie chart into an AST
 *
 * @param input - The Mermaid pie chart syntax
 * @returns Promise resolving to PieAST
 * @throws Error if parsing fails
 */
export declare function parsePie(input: string): Promise<PieAST>;
/**
 * Synchronous detection wrapper for compatibility
 */
export declare function detectPie(input: string): boolean;
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