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A comment on Clojure's core.typed vs Haskell. Parent comment

Re:Clojure's core.typed vs Haskell by brandonbloom on Monday September 30, 2013 @05:28PM (#6472495)
I'll agree it's best to avoid fully open unions when you can, but some (super useful) things truly don't work that way. Check out http://okmij.org/ftp/Computation/monads.html#ExtensibleDS for a cool example.
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Re:Clojure's core.typed vs Haskell by tel on Monday September 30, 2013 @05:31PM (#6472512)
I always think of Control.Exception as the poster child for open unions.
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Re:Clojure's core.typed vs Haskell by brandonbloom on Monday September 30, 2013 @08:08PM (#6473172)
Perfect, since exceptions are a subset of effects! Check out http://math.andrej.com/eff/ and its literature.
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