[m-users.] Multi predicate of entire enum

[Ace]

Ok, thank you!

On Sun, Jul 19, 2020 at 9:44 PM Zoltan Somogyi <zoltan.somogyi at runbox.com>
wrote:

>
> 2020-07-20 14:37 GMT+10:00 "Ace" <sheganinans at gmail.com>:
> > So say I have some enum:
> >
> > `:- type ex ---> a; b; c.`
> >
> > And I want to generate a function similar to:
> >
> > ```
> > :- pred ex_mul(ex::out) is multi.
> > ex_mul(a).
> > ex_mul(b).
> > ex_mul(c).
> > ```
> >
> > Any kind of standard library predicate I can use so I don't have to add a
> > new case to the predicate for every instance of the enum?
>
> No, there is no such library predicate.
>
> If updating the predicate manually becomes too much of a bother,
> you could write a script (in sh, python, perl or something else) that
> generates the definition of both the type and the predicate from
> a single authoritative source in another file.
>
> Zoltan.
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