[Haskell-cafe] implementing try for RWST ?

[Brandon S. Allbery KF8NH]

On Apr 17, 2007, at 0:03 , oleg at pobox.com wrote:
> eventually run in the IO monad. One may wonder then why do we need
> RWST transformer, given that the IO monad can implement both the state

For what it's worth, I got the impression that RWST was an example of  
a complex monad transformer --- not necessarily something useful.

-- 
brandon s. allbery  [solaris,freebsd,perl,pugs,haskell]   
allbery at kf8nh.com
system administrator  [openafs,heimdal,too many hats]   
allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university       
KF8NH