import { safeJsonParse, safeParse, safeParseWith, predicateToRefine, and, typedStruct, isString, isNumber } from 'is-kit';

const parseResult1 = safeParse(isString, 'ok');
if (parseResult1.valid) {
  parseResult1.value; // string
}

const isEven = predicateToRefine<number>((num) => num % 2 === 0);
const isEvenNumber = and(isNumber, isEven);
const parseEven = safeParseWith(isEvenNumber);
const parseResult2 = parseEven(4); // { valid: true, value: 4 }

type User = { id: string; name: string };
const isUser = typedStruct<User>()({ id: isString, name: isString });
const userResult = safeJsonParse('{"id":"1","name":"Ada"}', isUser);
// JSON is decoded to unknown, then validated without coercion.