/**
 * Formula Tokenizer
 *
 * Converts an Excel formula string into a stream of tokens.
 * Supports cell references (A1, $A$1), ranges (A1:B10),
 * cross-sheet references (Sheet1!A1), operators, function calls,
 * numbers, strings, booleans, and error literals.
 */
import { type Token } from "./token-types.js";
export declare function tokenize(formula: string): Token[];