[racket-dev] racket/stream

That's the heart of the question, its distillation to a one-liner. 

The real question how a list can __be__ a stream and how a LR stream can __be__ a stream. At a minimum, I would have expected a list can be converted into a stream and a lazy stream can be converted into a stream. (And the last sentence shows why this terminology is questionable.) 

Sorry I don't have time to spell it all out -- Matthias





On Mar 17, 2011, at 3:51 PM, Jay McCarthy wrote:

> Is the question: is stream-cons a macro or a function? If it is a
> function, the answer has to be diverge. I think it being a macro is a
> little weird, but it being a function and the answer not being 1 is
> non-streamy.
> 
> Jay
> 
> 2011/3/17 Robby Findler <robby at eecs.northwestern.edu>:
>> Matthew wrote "Streams include lists and lazy lists as produced by `stream-cons'
>>  (i.e., the usual one instead of the one currently exported by
>>  `racket/stream')."
>> 
>> so I think the answer is 1.
>> 
>> Robby
>> 
>> On Thu, Mar 17, 2011 at 2:42 PM, Matthias Felleisen
>> <matthias at ccs.neu.edu> wrote:
>>> 
>>> On Mar 17, 2011, at 3:38 PM, Matthew Flatt wrote:
>>> 
>>>> At Thu, 17 Mar 2011 15:34:17 -0400, Matthias Felleisen wrote:
>>>>> 1. I think we should stay away from 'stream' here.
>>>>> If Racket had grown out of the Unix tradition, I'd
>>>>> be fine with it. But we partially grew out the
>>>>> functional community, and they use 'stream' for
>>>>> a narrower concept.
>>>> 
>>>> Unless I'm confused, the proposal is to use "stream" in the
>>>> functional-programming sense, not in the Unix sense.
>>> 
>>> 
>>> Perhaps the misunderstanding is on my side but that's easy to resolve.
>>> 
>>> What does
>>> 
>>>  (stream-first (stream-cons 1 (infinite-loop)))
>>> 
>>> produce?
>>> 
>>> -- Matthias
>>> 
>>> _________________________________________________
>>>  For list-related administrative tasks:
>>>  http://lists.racket-lang.org/listinfo/dev
>>> 
>> 
>> _________________________________________________
>>  For list-related administrative tasks:
>>  http://lists.racket-lang.org/listinfo/dev
> 
> 
> 
> -- 
> Jay McCarthy <jay at cs.byu.edu>
> Assistant Professor / Brigham Young University
> http://faculty.cs.byu.edu/~jay
> 
> "The glory of God is Intelligence" - D&C 93