[Haskell-cafe] portable arrow instances

Wolfgang Jeltsch g9ks157k at acme.softbase.org
Tue Nov 18 09:01:00 EST 2008


how do I make a library work with both GHC 6.8 and GHC 6.10?  According to 
<http://www.haskell.org/haskellwiki/Upgrading_packages#Arrow_instances>, I 
should change all my Arrow instances but then they don’t work with GHC 6.8 
anymore, do they?  Or is the solution to force GHC 6.8 users to use 

Best wishes,

More information about the Haskell-Cafe mailing list