- From: Boris Zbarsky <bzbarsky@MIT.EDU>
- Date: Tue, 18 Jun 2013 08:36:07 -0400
- To: Cameron McCormack <cam@mcc.id.au>
- CC: "Tab Atkins Jr." <jackalmage@gmail.com>, Jonas Sicking <jonas@sicking.cc>, "public-script-coord@w3.org" <public-script-coord@w3.org>
On 6/18/13 3:13 AM, Cameron McCormack wrote:
> I've made the change that treats undefined on an object converted to an
> IDL dictionary as missing:
There are two issues here:
1) The new text has Type(V) where it means Type(value).
2) The [[Get]] is happening before we check for whether V is undefined
or null (this problem was actually preexisting, but with
[[HasProperty]]).
What Gecko's code for this looks like is more like this (after making a
change to align with the intent of the spec here):
If Type(V) is Null or Undefined set value to Undefined. Otherwise let
value be the result of calling the [[Get]] internal method on V
with property name key.
Let present be false if Type(value) is Undefined and true otherwise.
-Boris
Received on Tuesday, 18 June 2013 12:36:38 UTC