[Libguestfs] [PATCH v2 2/2] v2v: use Getopt.Symbol for few options

[Richard W.M. Jones]

On Tue, Jul 19, 2016 at 02:28:31PM +0200, Pino Toscano wrote:
> Use Getopt.Symbol for options with a fixed list of choices, so there is
> no need to check them on our own.

It would sure be nice if Getopt.Symbol was smarter and could do the
full conversion from string to internal type safely.  That would
remove the need to have the type unsafe cases like:

> +    | _ -> assert false (* Already checked by Getopt.Symbol. *)

This would be trivial with a camlp4 or ppx macro.  Since we don't want
to add those packages as dependencies, how about generating code (in
the generator) to do that?

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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