4 Mar
2005
4 Mar
'05
2:35 p.m.
On Fri, 4 Mar 2005 15:26:52 +0100, Benjamin Franksen <benjamin.franksen@bessy.de> wrote:
On Sunday 20 February 2005 14:19, Keean Schupke wrote:
TH has supported multi-parameter classes for a while... new in 6.4 is support for fundeps.
Yes, but unfortunately TH cannot create instances for them which is usually the boilerplate you want to avoid. From Language.Haskell.TH:
data Dec = ... ClassD Cxt Name [Name] [FunDep] [Dec] InstanceD Cxt Type [Dec] ...
Only one 'Type' can be given for an instance.
And there _should_ only be one type. Checkout 'appT'. Some real documentation for TH would clear misconceptions such as this. -- Friendly, Lemmih