Re: UI inconveniences with M-.

[Dmitry Gutov]

On 05/04/2015 04:41 PM, Vitalie Spinu wrote:

> At each moment of time there is only one active "set" which you can
> change with `xref-rotate-level`. The user then can customize levels of
> backends:
>
>    xref-backend-level-1 . (xref-default-mode-backend)
>    xref-backend-level-2 . (xref-etags elisp-xref)
>    xref-backend-level-3 . ....
>
>
> A set corresponding to level N would automatically include all backends
> from the lower levels. In the above example, if you set the level to 2
> xref will merge default-backend, etags and elisp-xref.

I'd rather not concern myself with this kind of complexity. However, if 
you're fine with merge logic simply concatenating the results (and it 
will be hard to do better), this shouldn't be hard to implement on top 
of the basic one-backend-at-a-time xref system, in a minor mode.