import { Fn } from '../Fn'; import { IfInvoking, Input } from '../utils'; export interface IsDigit extends Fn { out: IfInvoking>, boolean>; } export type InvokeIsDigit = [C] extends [ '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' ] ? true : false;