import { Obj } from '@mathigon/core';
export declare const CONSTANTS: Obj<number>;
export declare const BRACKETS: Obj<string>;
export declare const SPECIAL_OPERATORS: Obj<string>;
export declare const SPECIAL_IDENTIFIERS: Obj<string>;
export declare const IDENTIFIER_SYMBOLS: string[];
export declare const OPERATOR_SYMBOLS: string[];
export declare const FUNCTION_NAMES: Obj<string>;
export declare function escape(char: string): string;
declare const SPECIAL_FUNCTIONS: readonly ["abs", "round", "floor", "ceil", "max", "min", "mod", "lcm", "gcd", "gcf", "log", "exp", "ln", "sqrt", "root", "sin", "cos", "tan", "sec", "csc", "cot", "cosec", "cotan", "arcsin", "arccos", "arctan", "sinh", "cosh", "tanh", "sech", "csch", "coth", "cosech"];
export type SpecialFunction = typeof SPECIAL_FUNCTIONS[number];
export declare function isSpecialFunction(fn: string): fn is SpecialFunction;
export declare const VOICE_STRINGS: Obj<string>;
export {};