This makes me think that transients could (should?) be made reducible.
On Sat, Feb 24, 2018 at 4:19 PM, Timothy Baldridge <[email protected]>
wrote:
> Yes, transients mutate when updated. Seqs over sets are a immutable view
> over a collection. So if someone did get this to work, the implementation
> could be incorrect. And you could get something really strange like this:
>
> (def s (transient #{1 2}))
> (def sq (seq s))
> (first sq) => 1
> (disj s 1)
> (second sq) => nil
>
> There's a dozen things that could go really wrong here, but that's the
> gist of it.
>
> On Sat, Feb 24, 2018 at 8:14 AM, 'Alan Forrester' via Clojure <
> [email protected]> wrote:
>
>> Calling (first #{1}) gives the result 1.
>>
>> Calling (first (transient #{1})) gives an error:
>>
>> “IllegalArgumentException Don't know how to create ISeq from:
>> clojure.lang.PersistentHashSet$TransientHashSet clojure.lang.RT.seqFrom
>> (RT.java:550)”
>>
>> Is this behaviour intended?
>>
>> And whether or not this is intentional is there a way round it?
>>
>> Alan Forrester
>>
>>
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>
>
>
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