diff: bug fix for empty typeclass decls

[Fergus Henderson]

On 22-Jan-1998, David Glen JEFFERY <dgj at cs.mu.OZ.AU> wrote:
> Bug fix. When there are no methods for a class, the maybe(list(pred_proc_id))
> field of the hlds_instance_defn was left as no, rather than yes([]), so
> base_typeclass_info.m bombed out when trying to generate the pointers to the
> typeclass methods.
> 
> compiler/base_typeclass_info.m:
> 	Explicitly check for typeclasses with no methods, and set the
> 	mybe(list(pred_proc_id)) field to yes([]).

That looks fine.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>   |  "I have always known that the pursuit
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