"compatible descriptors" and how they are checked

David Bruant bruant.d at gmail.com
Wed Sep 19 05:31:00 PDT 2012

Le 19/09/2012 13:48, Jason Orendorff a écrit :
> On Wed, Sep 19, 2012 at 4:44 AM, David Bruant <bruant.d at gmail.com> wrote:
>> Also, the wiki doesn't say how the check is being performed.
> http://wiki.ecmascript.org/doku.php?id=harmony:proxies_spec
> TrapGetOwnProperty specifies how the check is performed.
Indeed, my mistake.
So the answer to my earlier is that the action is performed on the 
target directly.
"Return the result of calling the built-in function 
Reflect.getOwnPropertyDescriptor(target, P)."
This means that if the target itself is a proxy, its 
getOwnPropertyDescriptor trap will be called.

Once again, just to state how things are, all algorithms in the 
harmony:proxies_spec page will have the largest part of their internal 
revealed if either the target or the handler are themselves proxies. It 
may necessitate a careful review of each algorithm before adding them to 
the spec.


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