是否可以防止闭包捕获TypeScript中的外部变量？

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假设我有以下Typescript代码：

const x = 123
const f = () => x

Is it possible to do something such that Typescript compiler can produce an error/warning during compile time saying that function f is capturing an external variable x ?

P / S：我只是在寻找这种机制的技术可能性，为什么我不应该这样做的解释将不被接受。

评论
  • MS女人
    MS女人 回复

    I'd write f in a separate file, that way no other variables from the original file will be lexically visible. This work just fine in Javascript too:

    // main.ts
import { f } from './f'
const x = 123;
// do stuff with f and x

    // f.ts
export const f = () => {
  console.log('running f');
  // trying to reference x here (or anything from the original file)
  // will throw a TS error
};