proposal: let in if parentheses

[Jordan Harband]

```
{
  let a = b();
  if (a) {
    c(a);
  }
}
```

On Tue, Aug 21, 2018 at 10:54 AM, Ali Rahbari <rahbari at gmail.com> wrote:

> while it's possible to use let keyword in for loop parentheses, it's not
> possible to use it in if parentheses.
>
> There are two use cases for this:
>
> *1- if (let a = b()) a.c();*
>  this can be done using optional chaining which is proposed:
> b()?.c();
>
> *2- if (let a = b()) c(a);*
> this or more sophisticated patterns can't be done in any way other than
> this:
> let a = b();
> if (a) c(a);
>
> the problem here beside more line of codes, is *a *is defined outside of
> if scope.
>
>
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>
>
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