package main

import strconv
import os

fun parse(value: String): Result<Int, Error> {
    return strconv.atoi(value)
}

fun changeDirectory(path: String): Result<Unit, Error> {
    return os.chdir(path)
}

fun main() {
    println(parse("42").unwrap())
    println(parse("invalid").unwrapOr(0))
    changeDirectory(".").unwrap()
}