singcl/r-ts

type Name = string;
type NameResolver = () => string;
type NameOrResolver = Name | NameResolver;
function getName(n: NameOrResolver): Name {
    if (typeof n === 'string') {
        return n;
    }
    return n();
}

// 泛型类型别名
type Tree<T> = {
    value: T;
    left: Tree<T>;
    right: Tree<T>;
};

// 与交叉类型一起使用
type LinkedList<T> = T & { next: LinkedList<T> };
interface Person {
    name: string;
}

var people: LinkedList<Person>;
var s = people.name;
var s = people.next.name;
var s = people.next.next.name;
var s = people.next.next.next.name;

// 然而，类型别名不能出现在声明右侧的任何地方。
type Yikes = Array<Yikes>; // error