Figured it out -- "type 'a maybe = Result of 'a | Exception of exn"

Putting the tick-a before the "maybe" was nonintuitive to me.

~~ Robert.

Robert Fischer wrote:
> Is it possible to do a variant type along the lines of "type try = Result of 'a | Exception of exn"?
>    When I try that, I get an error saying "Unbound type parameter 'a".
> 
> ~~ Robert.
> 
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