[m-dev.] Re: [mercury-users] Mutual Exclusivity & Exhaustiveness

[Lars Yencken]

> No -- if you declare that this disjunction has exactly one solution,
> then the compiler could safely infer that any disjunction
> containing a subset of the disjuncts has at most one solution.
> Hence it should consider such switches to be semidet rather than nondet.
> 
> So there's no difference between mutual exclusivity and
> `promise_exactly_one_solution' here.

Sorry, you're right ;)
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