[Haskell-cafe] Catch multiple exceptions using 'Control.Exception'

[Albert Y. C. Lai]

On 13-07-06 12:12 PM, Nikita Karetnikov wrote:
> Is there an open sum type or a closed existential type?

OCaml has open sum types.

I haven't really seen closed existential types. (I have seen some 
approximations, but each lacks one last bit.)