declare enum Types {
    CONSTANT = "CONSTANT",
    NAMED_FUNCTION = "NAMED_FUNCTION",
    OPERATOR = "OPERATOR",
    VARIABLE = "VARIABLE",
    NUMBER = "NUMBER",
    LEFT_PARENTHESIS = "LEFT_PARENTHESIS",
    RIGHT_PARENTHESIS = "RIGHT_PARENTHESIS",
    UNKNOWN = "UNKNOWN"
}
type OperatorToken = {
    value: string;
    type: Types.OPERATOR | Types.NAMED_FUNCTION;
    args: number;
    precedence: number;
};
type ConstantToken = {
    value: string;
    type: Types.NUMBER | Types.VARIABLE | Types.LEFT_PARENTHESIS | Types.RIGHT_PARENTHESIS | Types.CONSTANT;
};
type Token = ConstantToken | OperatorToken;
type Maybe<T> = T | null;

export { type ConstantToken, type Maybe, type OperatorToken, type Token, Types };