Re: [Haskell-cafe] Re: Implementing fixed-sized vectors (using datatype algebra?)

On Feb 9, 2008 4:08 PM, Wolfgang Jeltsch wrote:

So what would (D1 :* D1) :* (D2 :* D2) mean then?

Nothing. That value doesn't satisfy the Nat or Post class constraints and should be taken into consideration. Why should :* be provided a meaning? it is an unavoidable syntactical connective for all that I care. The meaning is provided by class constraints and that's all that matter from the semantical point of view.