"Dominic Steinitz"
I have been trying to write a Crypto library and so far it works with ghc and hugs.
Am I right in thinking I am going to struggle with nhc? It uses Word8 and Word64 heavily. For example, cipher block chaining relies on xoring Word64.
The things you mention are not a particular problem for nhc98. The only problem I encountered in the Crypto.hs code is that its use of the type class machinery is not Haskell'98 compliant. instance Bits [Bool] where ... is illegal in Haskell'98, because an instance head must be either a simple type name, or a type constructor applied to only type variables. (See the Report section 4.3.2) If ghc and Hugs permit this, then it is a non-standard extension to the language. Unfortunately, I don't immediately see an easy way to convert this construction into something more amenable. Regards, Malcolm