[MLton] Non-exhaustive exn fn match

[Vesa Karvonen]

Quoting Vesa Karvonen <vesa.karvonen@cs.helsinki.fi>:
> using exceptions as suggested in Type Specialization with Sharing by
> Martin Elsman.

Sorry, I meant to refer to "Type-Specialized Serialization with Sharing"
(http://www1.itu.dk/sw5450.asp).

-Vesa Karvonen