[Haskell-cafe] better way to do this?

[Edward Z. Yang]

Excerpts from Ketil Malde's message of Wed Oct 07 05:13:19 -0400 2009:
> One could argue that IO should be broken down into a set of "sub-monads"
> encapsulating various subsets of the functionality - file system,
> network access, randomness, and so on.  This could extend the "safe
> spot" to cover much more computational real estate, and effectively
> sandbox programs in various ways.

You can approximate this using the Prompt monad.

http://hackage.haskell.org/packages/archive/MonadPrompt/1.0.0.1/doc/html/Control-Monad-Prompt.html

Cheers,
Edward