// ============= Test Cases =============
import type { Equal, Expect } from './test-utils'

const tuple = ['tesla', 'model 3', 'model X', 'model Y'] as const

type cases = [
  Expect<Equal<TupleToObject<typeof tuple>, { tesla: 'tesla'; 'model 3': 'model 3'; 'model X': 'model X'; 'model Y': 'model Y' }>>,
]

// @ts-expect-error
type error = TupleToObject<[[1, 2], {}]>

// ============= Your Code Here =============
type TupleToObject<T extends readonly string[]> = {
  [key in T[number]]: key
}

// usage:
type tuple = typeof (['name', 'string'] as const)

type obj = TupleToObject<tuple>

/*
{
  'name': 'name',
	'string': 'string'
}
*/

此处用到了一个方式，即 Tuple 如何转化为 union type?

type tuple1 = [number, string];
type unionType = number | string;
// how ??

type unionType1 = tuple1[number];