Re: Curry-on to infinity

From: Sebastian Hanowski <sebastian_hanowski_at_gmx.de>
Date: Mon, 14 Dec 2015 07:49:32 +0100

On Thu, Dec 10, 2015 at 10:53:00PM +0100, Michael Hanus wrote:
> As I wrote before, the second argument of the non-strict unification
> operator (=:<=) must be a pattern variable in order to stay in the
> well-understood framework of functional patterns. Since this is not the
> case in your definition, it might compute something as intended,
> but the general declarative semantics is not clear (to me).

Challenge accepted ;)

fibaux fib xs | (1, (1, tail (tail fib))) =:<= xs = fib

fibs = fibaux xs (head xs, (head (tail xs), zipWith (+) xs (tail xs)))
  where xs free


And if non-linearity of patterns isn't an issue...

fibaux fib (1, (1, tail (tail fib))) = fib
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Received on Tue Dec 15 2015 - 15:45:44 CET

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