[Haskell-cafe] mapping a concept to a type
Edward Z. Yang
ezyang at MIT.EDU
Fri May 18 21:10:00 CEST 2012
> I find both heavy and redundant. The first forces me to specify if I want
> an argument of not (with the constructors MR and NR)
I'm sorry, I don't understand what you mean here.
> Do you know of a construction/abstraction that allows having or not an
> argument (a variable number of arguments, here zero or one)?
Either way you do it (Maybe, or building the variant yourself), you're
going to need a constructor. This is a feature, not a bug.
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