Add support for captured block scoped bindings

[vladima]

// cc @rbuckton

[rbuckton]

What about an arrow function in a computed property name or extends clause of a class?

[vladima]

Good point

[rbuckton]

This comment may now be incorrect.

How do we want to handle captured block scope bindings for initializers?

let ar = [];
for (let i = 0; i < 2; i++) {
  ar.push(class { x = i; });
}
console.log(new ar[0]().x); // should this be 0 or 2?
console.log(new ar[1]().x); // should this be 1 or 2?

[vladima]

comment is fixed. Re initializers, I think this code should be equivalent to

"use strict"
let ar = [];
for (let i = 0; i < 2; i++) {
  ar.push(class { x: number; constructor() { this.x=i }; });
}
console.log(new ar[0]().x); // should be 0
console.log(new ar[1]().x); // should be 1

old emitter does not support this either so I'll file it as a separate issue that should be fixed

[vladima]

filed #7714 to track it

[rbuckton]

👍

[DanielRosenwasser]

Nit: Newline above

[vladima]

✅