Re: master 9ac6ff5: Make the test for auto-mode-alist from .dir-local.el stricter

[Stefan Monnier]

Lars Ingebrigtsen [2021-07-24 11:30:20] wrote:
> larsi@gnus.org (Lars Ingebrigtsen) writes:
>> +       (not (provided-mode-derived-p mode 'special-mode))))
> This may be too strict...  on the other hand, perhaps the check should
> be even stricter -- perhaps a whitelist of allowed modes?  (Perhaps (by
> default) populated from `auto-mode-alist'.)

Could you clarify what is the purpose of this test?

AFAICT the test that "corresponds" to what we do for file-local
variables is just to check the `-mode` suffix (since we accept any
`mode:foo` and call `foo-mode`).

So if you think we should make it stricter for the dir-local
auto-mode-alist, maybe we should also make it stricter for the
file-local `mode:` thingy.


        Stefan