Module import/export bindings

Mark S. Miller erights at google.com
Wed Mar 18 17:11:13 UTC 2015


I have not been following this thread, so my response may be out of
context. But I have to point out that

    let x = y;

is *not* an assignment. It is an initialization.




On Wed, Mar 18, 2015 at 12:34 PM, caridy <caridy at gmail.com> wrote:

> Kyle, same answer, `let x = y` is just an assignment. btw, you cannot
> change `y` in that module, that's a static error.
>
> /caridy
>
> > On Mar 18, 2015, at 12:26 PM, Kyle Simpson <getify at gmail.com> wrote:
> >
> >> we are NOT changing the semantic of the assignment expression.
> >
> > So the result is going to be `42` / `"orig"`, right? :)
> >
> > The reason I asked is not because I thought we were changing the
> semantic of the assignment expression, but because I wasn't sure if this
> top-level "const or whatever binding" was some sort of special thing that
> you can only hold a reference to. Clearly not.
> >
> > Also, since `y` keeps a reference to the "orig"inal function reference
> imported, even if the module updates itself, this very well may affect
> those who (in places other than this thread, and for different reasons)
> have often suggested they plan to do stuff like:
> >
> > ```js
> > import { y } from "..";
> >
> > let x = y;
> > ..
> > // use x now
> > ```
> >
> > In those cases, I was trying to find out if `x` could be updated by the
> module itself, like `y` can, because that matters (either good or bad) to
> the desire to use such a pattern. Since `x` can't get updated here, it's
> now clear to me that I wouldn't want to use such pattern, for fear that I
> am not using the latest API binding.
> >
> > Thanks for clarifications!
> > _______________________________________________
> > es-discuss mailing list
> > es-discuss at mozilla.org
> > https://mail.mozilla.org/listinfo/es-discuss
>
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>



-- 
    Cheers,
    --MarkM
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