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02793-medium-mutable
Medium
readonly
object-keys

挑战来源: type-challenges/02793-medium-mutable

实现一个通用的类型 Mutable<T>，使类型 T 的全部属性可变（非只读）。

例如：

interface Todo {
  readonly title: string
  readonly description: string
  readonly completed: boolean
}

type MutableTodo = Mutable<Todo> // { title: string; description: string; completed: boolean; }

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测试用例来源: type-challenges/02793-medium-mutable/test-cases.ts
import type { Equal, Expect } from '@type-challenges/utils'

interface Todo1 {
  title: string
  description: string
  completed: boolean
  meta: {
    author: string
  }
}

type List = [1, 2, 3]

type cases = [
  Expect<Equal<Mutable<Readonly<Todo1>>, Todo1>>,
  Expect<Equal<Mutable<Readonly<List>>, List>>,
]

type errors = [
  // @ts-expect-error
  Mutable<'string'>,
  // @ts-expect-error
  Mutable<0>,
]