Pretty neat stuff! I'm sure you had as much fun with it as I have with 
agent2: https://github.com/laforge49/agent2#readme

On Saturday, August 8, 2015 at 5:50:48 AM UTC-4, Atamert Ölçgen wrote:
>
> Hi William,
>
> Manifold deferreds can capture exceptions like future does.
>
> http://aleph.io/manifold/deferreds.html
>
>
>
> On Sat, Aug 8, 2015 at 12:44 AM, William la Forge <lafo...@gmail.com 
> <javascript:>> wrote:
>
>> Still a newbie here, about to release my first Clojure project. But that 
>> clojure blob will take some digging on my part. I use a gummed up 
>> dereference function that checks for Throwable in the meantime. 
>>
>> My goal right now is to become a Dtomic freelancer. So much to learn! 
>> Which is why I'm doing projects. Only way I know to become proficient! So 
>> yeah, I need to get to the point where I can roll my own. Similarly, my 
>> first project builds on the send method, but I really need to get to the 
>> point where I can roll my own agent.
>>  
>> In any case, thanks Francis. I can only promise more dumb questions in 
>> the future. ;-)
>>
>>
>> On Friday, August 7, 2015 at 5:24:24 PM UTC-4, Francis Avila wrote:
>>>
>>> Huh, I was sure I had done this before, but I misremembered, I was using 
>>> my own promise that rethrew Throwable instances on deref (and it was in 
>>> clojurescript!)
>>>
>>> Clojure promises have no notion of failure, only realized/not-realized. 
>>> You need to deliver a sentinel type or value and check for it on deref, or 
>>> implement your own promise type which does it for you. (It's not that hard: 
>>> https://github.com/clojure/clojure/blob/clojure-1.7.0/src/clj/clojure/core.clj#L6803
>>>  
>>> )
>>>
>>> On Friday, August 7, 2015 at 4:09:39 PM UTC-5, William la Forge wrote:
>>>>
>>>> Sorry, I meant to ask how to fail with a promise? It seems that there 
>>>> is no fail method.
>>>>
>>>> On Friday, August 7, 2015 at 4:52:47 PM UTC-4, Francis Avila wrote:
>>>>>
>>>>> Futures automatically capture exceptions raised in their bodies and 
>>>>> reraise them when the future is derefed. Promises also throw exceptions 
>>>>> when derefed.
>>>>>
>>>>> Unlike promises, futures are created with the code that delivers their 
>>>>> value, so calling fail and deliver explicitly on a future makes no sense.
>>>>>
>>>>> Think of futures as a thin wrapper around a promise which spawns a 
>>>>> thread, runs the code, and to the wrapped promise either delivers the 
>>>>> result of the code or calls (fail private-promise raised-exception) for 
>>>>> you.
>>>>>
>>>>> On Friday, August 7, 2015 at 2:14:30 PM UTC-5, William la Forge wrote:
>>>>>>
>>>>>> A future fails when it throws an exception. How to do that with a 
>>>>>> future?
>>>>>>
>>>>>> It looks like (fail future exception) does not do the trick: 
>>>>>> http://dev.clojure.org/display/design/Promises
>>>>>>
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>
>
>
> -- 
> Kind Regards,
> Atamert Ölçgen
>
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