domenic at domenicdenicola.com (2013-08-23T17:52:22.670Z)
On Aug 20, 2013, at 1:31 PM, Andrea Giammarchi <andrea.giammarchi at gmail.com> wrote:
> [In this page](http://wiki.ecmascript.org/doku.php?id=harmony:typed_objects), and in the latest meeting note too, I can read both uint8 and Uint8, as example.
Bug. Fixed, thanks.
> **The Question**
> How is `new StructType({x:Uint32, y:Uint32})` supposes to understand the type? `instanceof Uint32` or `typeof v === "uint32"` or ... both in case of `boolean` and `string` ?
Neither. It tells you that the x and y fields have typeof 'number' and that their values are constrained to be integers in the range [0, 2^32).
> A bonus question would be: does anybody know when this stuff is planned to go out? Not a single beta/alpha channel is exposing anything at all so far.
Nikhil Marathe and Niko Matsakis are actively working on the implementation for SpiderMonkey: https://bugzilla.mozilla.org/show_bug.cgi?id=578700
Dmitriy Lomov is actively working on updating the prollyfill to match the current API: https://github.com/dherman/structs.js https://github.com/dherman/structs.js/pull/12
Not sure if anyone on the V8 team (which includes Dmitriy) has started implementation but I believe they're interested. Right now Dmitriy is focused on the prollyfill and spec.
On Aug 20, 2013, at 1:31 PM, Andrea Giammarchi <andrea.giammarchi at gmail.com> wrote: > [In this page](http://wiki.ecmascript.org/doku.php?id=harmony:typed_objects), and in the latest meeting note too, I can read both uint8 and Uint8, as example. Bug. Fixed, thanks. > **The Question** > How is `new StructType({x:Uint32, y:Uint32})` supposes to understand the type? `instanceof Uint32` or `typeof v === "uint32"` or ... both in case of `boolean` and `string` ? Neither. It tells you that the x and y fields have typeof 'number' and that their values are constrained to be integers in the range [0, 2^32). > A bonus question would be: does anybody know when this stuff is planned to go out? Not a single beta/alpha channel is exposing anything at all so far. Nikhil Marathe and Niko Matsakis are actively working on the implementation for SpiderMonkey: https://bugzilla.mozilla.org/show_bug.cgi?id=578700 Dmitriy Lomov is actively working on updating the prollyfill to match the current API: https://github.com/dherman/structs.js https://github.com/dherman/structs.js/pull/12 Not sure if anyone on the V8 team (which includes Dmitriy) has started implementation but I believe they're interested. Right now Dmitriy is focused on the prollyfill and spec. Dave