[Haskell-cafe] "Prompt" Monad

Ryan Ingram ryani.spam at gmail.com
Tue Aug 12 13:28:58 EDT 2008

Latest code is on hackage:

There is a "sample" file with lots of other monads implemented in
terms of Prompt included, along with some links to other samples; I
seem to recall there being a "guess a number" game on paste.lisp.org
that used Prompt to switch between user control and AI control.

Let me know if you have any problems building it and I'll patch it up.

  -- ryan

On Tue, Aug 12, 2008 at 5:50 AM, Martin Hofmann
<martin.hofmann at uni-bamberg.de> wrote:
> I just came across last year's thread about Ryan Ingram's "Prompt" monad
> ( http://www.mail-archive.com/haskell-cafe@haskell.org/msg33040.html )
> and wondered if it might be useful for debugging and program analysis
> purposes. In particular, I thought about enforcing program decisions
> interactively. Consider for example modifying the heuristic function of
> a search algorithm at specific breakpoints.
> Is this possible with the "Prompt" monad? Furthermore, could somebody
> post the full code of it (and maybe a short example how to use it if at
> hand)? I was not able to run the code from the previous posts and the
> referring links are dead.
> Thanks a lot,
> Martin
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