Some Typed Objects Confusion

Andrea Giammarchi andrea.giammarchi at gmail.com
Wed Aug 21 17:08:15 PDT 2013


I agree lower ALL the cases is a win ... also because `boolean`, `string`,
and `object`, aren't reserved words while function obviously is so with
current proposal where `object` means `function` too and `any` includes
null there's nothing ambiguous and less to bother about references.


On Wed, Aug 21, 2013 at 5:02 PM, David Herman <dherman at mozilla.com> wrote:

> On Aug 21, 2013, at 2:36 PM, Brendan Eich <brendan at mozilla.com> wrote:
>
> > David Herman wrote:
> >> Any, String and Object should still be uppercase. The naming convention
> is: value types lowercase, reference types uppercase.
> >
> > Is String really a reference type? Currently you can't tell, and JS docs
> and books don't (AFAIK) say "reference type" apart from object (not null;
> including function). String also happens to spell the constructor/converter
> function, which sadly both returns a primitive and creates a String object
> depending on how it is called.
>
> You can tell, in that a type that includes String must be opaque. The
> might-be-a-pointer property of a type is observable in the typed objects
> API in that it cannot expose its backing storage as an ArrayBuffer. Strings
> necessarily might-be-a-pointer.
>
> I take your point that it's confusing on the primitive/object axis, though.
>
> So... all right, let's break out those paintbrushes. Let's say we use the
> lowercase naming convention for purely immutable types, independent of
> whether they might-be-a-pointer. This still leaves Dmitry's question about
> the unfortunate name collision -- even though modules make this "okay,"
> it's still a PITA in practice not to be able to import Object without
> shadowing the built-in Object.
>
> Personally I'd be fine with just lowercasing all the things. Brendan, you
> cared about using capitalization for object types, though. What color is
> your bikeshed?
>
> Dave
>
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