[Haskell-cafe] Best idiom for avoiding Defaulting warnings with ghc -Wall -Werror ??

[Brandon S. Allbery KF8NH]

On Jun 22, 2007, at 18:29 , Henning Thielemann wrote:

> If the error occurs anyway, you get a report that your believe was  
> wrong.
> (Or the user gets the report, and he doesn't know how to react.)

Well, that's why I included the other leg, where I'd like the  
compiler to catch me at compile time if I set up a situation where it  
might occur --- because ideally that case can't happen at run time,  
but if I set up the types that way then I can't build the state  
machine because it's a polymorphic list.  (And no, I don't think  
HList is the right answer here.)

-- 
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