8 May
2012
8 May
'12
1:42 p.m.
On Tue, May 8, 2012 at 2:36 PM, MigMit
Hi café, a quick question.
Is there a somewhat standard class like this:
class Something c where unit :: c () () pair :: c x y -> c u v -> c (x, u) (y, v)
?
I'm using it heavily in my current project, but I don't want to repeat somebody else's work, and it seems general enough to be defined somewhere; but my quick search on Hackage didn't reveal anything.
I know about arrows; this, however, is something more general, and it's instances aren't always arrows.
Are you aware of generalized arrows [1]? It's still a lot more than your Something, though. [1] http://www.cs.berkeley.edu/~megacz/garrows/ -- Felipe.