There's an annoying inconsistency:
(CustId 47, CustName "Fred", Gender Male) -- threeple
(CustId 47, CustName "Fred) -- twople
-- (CustId 47) -- oneple not!
() -- nople
(That is, it's annoying if you're trying to make typeclass instances for
extensible/contractable tuples. Yes, I know I could use HLists.)
I'm not happy with either approach I've tried:
data Oneple a = Oneple a -- (or newtype)
(Oneple $ CustId 47) -- too verbose
type Oneple a = [a]
[CustId 47] -- at least looks bracket-y
What do you do?
AntC
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