/**
 * Given a C expression, returns the equivalent postfix (Reverse Polish)
 * notation terms as an array.
 *
 * If a postfix string is desired, simply `.join( ' ' )` the result.
 *
 * @example
 *
 * ```js
 * import postfix from '@tannin/postfix';
 *
 * postfix( 'n > 1' );
 * // ⇒ [ 'n', '1', '>' ]
 * ```
 *
 * @param {string} expression C expression.
 *
 * @return {string[]} Postfix terms.
 */
export default function postfix(expression: string): string[];