Re: on helm substantial differences

[Stefan Monnier]

>> In particular, you can change the *Completions* display on the fly
> It would be nice if in addition to already existing 'annotation-function'
> 'completing-read' also supported 'format-function' or 'display-function',
> i.e. a function that would return a completion candidate to display
> in the *Completions* buffer.

Agreed: the `annotation-function` is much too limited.
I don't think "in addition" is right tho: the new functionality should
aim to replace the current `annotation-function`.

Tangentially related are the :company-doc-buffer, :company-docsig,
and :company-location properties, which aren't documented (and were
designed simply to match what `company-mode` needed), and might deserve
to be more properly added to the official API.


        Stefan