import type Cion from '@taiyakihitotsu/cion';
export type isRational<S> = S extends string ? Cion.Lisp<`(re-find '^[+-]?[0-9]+(/[+-]?[0-9]+)?$' '${S}')`> extends `''` ? false : true : false;
export declare const unsafeSomeFraction: (s: unknown) => number | string;
export declare const someFraction: <T extends number | string>(s: T extends (isRational<T> extends true ? T : never) ? T : never) => number | string;
export * as fraction from './fraction.js';