typed objects and value types

[Dmitry Lomov]

Note that "value object" proposal does _not_ address int64.


On Tue, Apr 8, 2014 at 1:27 AM, Waldemar Horwat <waldemar at google.com> wrote:

> On 04/02/2014 07:32 AM, Niko Matsakis wrote:
>
>> I just wanted to let people on es-discuss know about two of my recent
>> blog posts concerning typed objects. The first is a kind of status
>> report:
>>
>> http://smallcultfollowing.com/babysteps/blog/2014/04/01/
>> typed-objects-status-report/
>>
>> and the second details some (preliminary) thoughts on how one could
>> build on typed objects to support user-defined value types:
>>
>> http://smallcultfollowing.com/babysteps/blog/2014/04/01/
>> value-types-in-javascript/
>>
>
> We've been tossing things like this around for a while.  I'd personally
> love to have some notion of value types along with int64 and friends (after
> having the proposals out for 15 years).  Note that these generally got
> bogged down on one of four issues:
>
> - Handling of NaN's and ±0
> - Direction of binary operator coercion (if x is an int64, is x+1 an int64
> or a regular double Number?  What about x+0.5?)
> - Built-in int64 vs. providing a library that allows folks to implement
> int64 (whichever one was proposed, folks wanted the other one)
> - Cross-realm behavior
>
>     Waldemar
>
>
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