[plt-scheme] coroutine versus stream

Thanks for the info,
I got a lot more relevant hits this time, although most of them refer to rather old articles.
1986 is a long way back, but that does not mean the articles are outdated, of course.
I saw some articles introducing the concept of first class continuations. No longer new, of course, but may be interesting from a historical point of view.
Thanks,
Jos
  ----- Original Message ----- 
  From: Jim Bender 
  To: Jos Koot 
  Cc: Matthias Felleisen ; plt-scheme at list.cs.brown.edu 
  Sent: Sunday, April 19, 2009 12:23 AM
  Subject: Re: [plt-scheme] coroutine versus stream


  I believe the reference is to Carolyn Talcott's dissertation "The essence of Rum: A theory of intensional and extensional aspects of Lisp-type computation". Stanford, 1986. Unfortunately this is not available online, as far as I know.


  Jim

  Sent from my iPhone

  On Apr 18, 2009, at 4:54 PM, "Jos Koot" <jos.koot at telefonica.net> wrote:


    Thanks, Matthias,
    I did a quick search for Talcott 1986, but got so many hits relevevant info is hidden like a leaf on a sound tree.
    Can you be more specific? Thanks
    Jos
      ----- Original Message ----- 
      From: Matthias Felleisen 
      To: Jos Koot 
      Cc: plt-scheme at list.cs.brown.edu 
      Sent: Saturday, April 18, 2009 11:43 PM
      Subject: Re: [plt-scheme] coroutine versus stream




      It is indeed a well-known fact that streams and coroutines are two sides of the same coin. Talcott's 1986 dissertation is the earliest theoretical treatment that I know. -- Matthias






      On Apr 18, 2009, at 5:38 PM, Jos Koot wrote:


        It seems to me that in many cases the same problem can be solved (for an eager evaluater) both by coroutines and by streams. Both solutions very well show the structure of the principal algorithm as might have been written with a lazy evaluator in mind. Which approach would be preferred in terms of efficiency (time and memory). May be you would like to address other aspects as well. One reason that makes me tend to choose streams, is that the latter seem better suited to automatic code generation from purely lazy code.
        Thanks, Jos
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