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

Am Samstag, 9. Februar 2008 23:46 schrieben Sie:

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

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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.

I was just refering to Stefan’s argument that :* should be treated as a form of concatenation. From your point of view, it’s clear, of course. Best wishes, Wolfgang