import * as XColorSpec from "./types";
/**
 * Parse an `xparse` argument specification string to an AST.
 * This function caches results. Don't mutate the returned AST!
 *
 * @param {string} [str=""] - LaTeX string input
 * @returns - AST for LaTeX string
 */
export declare function parse(str?: string): XColorSpec.Ast;
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