with

Mark S. Miller erights at google.com
Wed Nov 16 23:27:36 PST 2011


On Wed, Nov 16, 2011 at 11:24 PM, David Herman <dherman at mozilla.com> wrote:

> Someone who shall remain nameless shot this down when I floated it
> privately. But I just have to throw this out there, because I kind of can't
> stop myself falling in love with it...
>
> We used to have this (mis-)feature for dynamically extending scope chains,
> and despite being ill-conceived, it did have this elegant syntax spelled
> "with." In ES5 strict, we banned that feature, and it's not coming back for
> ES6, or ever.
>
> Now we want a (good) feature for dynamically extending prototype chains.
> And here's this old keyword, just lying around unused...
>
>    obj with { foo: 12 } with { bar: 13 } with { baz: 17 }
>

I don't get it yet. What do you mean by "dynamically extending prototype
chains"? What does the above expression do and evaluate to?



>
> So? Who's with me?
>
> Dave
>
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> https://mail.mozilla.org/listinfo/es-discuss
>



-- 
    Cheers,
    --MarkM
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