[isabelle-dev] Shadowing of theorem names in locales
ballarin at in.tum.de
Fri Jan 10 20:34:48 CET 2014
On 28 December, 2013 19:53 CET, Florian Haftmann <florian.haftmann at informatik.tu-muenchen.de> wrote:
> HOL-Complex now builds with strict naming policy for facts (again).
Thanks, that's cool.
> I have stumbled over something which needs some consideration: with
> strict naming policy, locales can be compromised by »injecting«
> duplicate facts to imported locales.
That's not cool, but I would say that is a user error. There are other ways of compromising locales, for example with the sublocale command.
> This does not exhibit itself until
> the compromised locale context is (re-)entered, and I think this is not
> desirable. My first spontaneous thought is that strictness should not
> apply during the initialisation of a locale context.
I wouldn't want to add special treatment for this. Currently we can only ensure that a locale is intact by visiting its context. It would be better if integrity checking could be done in an incremental fashion. But that would require much more sophistication.
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