Although that is a weird Inconsistency. To clarify, which of these don't
throw when Sub is called as a constructor? It's surprising IMHO if any
don't.
```js
// 1.
function Super() { return 2 }
class Sub extends Super {}
// 2.
class Super {
constructor() { return 2 }
}
class Sub extends Super {}
```
On Thu, Mar 10, 2016, 00:24 Raul-Sebastian Mihăilă <[email protected]>
wrote:
> I agree, that's why I think it would have been better to throw if base
> constructors returned primitives different from undefined. It would have
> been inconsistent with the way normal old functions behave. But, currently,
> there are two other inconsistencies: there's an inconsistency between base
> class constructors and derived class constructors, and one between normal
> functions and derived class constructors. I would have preferred the first
> inconsistency (between base class constructors and normal functions).
>
> On Thu, Mar 10, 2016 at 3:58 AM, Isiah Meadows <[email protected]>
> wrote:
>
>> Classes aren't intended to be value type factories, so I find this
>> unlikely to change.
>>
>> On Tue, Mar 8, 2016, 15:46 Raul-Sebastian Mihăilă <[email protected]>
>> wrote:
>>
>>> I see that in step 13 of the [[Construct]] method of ordinary functions (
>>> https://tc39.github.io/ecma262/#sec-ecmascript-function-objects-construct-argumentslist-newtarget),
>>> the value resulted from the evaluation of the function body is checked and
>>> if the constructor is a derived constructor, the value cannot be a
>>> primitive different from undefined. Why isn't the same check performed if
>>> the constructor is a base constructor?
>>>
>>> Example of code that, when executed in the Chrome console, throws:
>>>
>>> ```
>>> (function () {
>>> 'use strict';
>>>
>>> class A {
>>> constructor() {
>>> return 4;
>>> }
>>> }
>>>
>>> class B extends A {
>>> constructor() {
>>> super();
>>>
>>> return 2;
>>> }
>>> }
>>>
>>> new B();
>>> })();
>>> ```
>>> _______________________________________________
>>> es-discuss mailing list
>>> [email protected]
>>> https://mail.mozilla.org/listinfo/es-discuss
>>>
>>
>
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
