On 2016-06-18 14:09, Stefan Monnier wrote:
>> Probably not. Last I checked, Ido only supported "simple" completion tables,
>> such as lists and alists (and maybe obarray). Which is a shame, in this and
>> other use cases.
> 
> Indeed, it's too bad and it's actually surprising since the main two
> cases where ido is used (buffers and files) both use functions as
> completion table.

Btw, ido-ubiquitous seems broken in the latest master; is this expected? Even in ido-ubiquitous-mode, C-h f doesn't use ido completion anymore.