bug#81624: New command: xref-find-by-kind

On 18/08/2026 17:01, João Távora wrote:
>> Couldn't really decide, flipped a coin. But if we flip it back, the
>> command definitions get even smaller:
>>
>>    (defun eglot-find-declaration (identifier)
>>      "Find declarations for IDENTIFIER."
>>      (interactive (list (xref-read-identifier "Find declarations of: ")))
>>      (xref-find-by-kind identifier 'declaration))
> I definitely think you should do this -- i.e. flip back -- the other one
> is repeating a database entry.  Consulting this small database should be
> cheap.  Again, if you really want to do it by the book, make the
> database in Lisp symbols: use a separate obarray and 'intern-soft' (the
> poor man's elisp equivalent to FIND-SYMBOL+package of proper civilized
> Lisps).

Very good, I've pushed this version.

Yeah, it's not really about noticeable performance, just about throwing 
away a usable value.

Regarding obarray, I think you're either describing a caching scheme 
(indefinite or timed) or a more complex return value for 
xref-backend-xref-kinds.