Cloning WeakSet/WeakMap

[Michał Wadas]

English isn't my native language, so I probably made a mistake.

I was asked to add WeakSet.prototype.union(iterable) creating new WeakSet
instance including data from both iterable and original WeakSet.



On 9 Feb 2018 4:01 pm, "David Bruant" <bruant.d at gmail.com> wrote:

> Hi,
>
> My understanding is that cloning a WeakSet into a Set would remove all its
> properties related to security and garbage collection.
>
> The properties related to security and garbage collection of WeakSet are
> based on the fact that its elements are not enumerable by someone who would
> only be holding a reference to the WeakSet. If you want to "clone" a
> WeakSet into a Set it means you have an expectation that the set of
> elements are deterministically enumerable.
>
> WeakSets and Sets, despite there close name and API, are used in different
> circumstances.
>
> David
>
>
> 2018-02-09 9:53 GMT-05:00 Michał Wadas <michalwadas at gmail.com>:
>
>> Hi.
>>
>> I was asked to include a way to clone WeakSet in Set builtins proposal.
>> Is there any consensus on security of such operation?
>>
>> Michał Wadas
>>
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>>
>>
>
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