Re: Adding support for xref jumping to headers/interfaces

[Dmitry Gutov <dgutov@yandex.ru>]

On 06/03/2023 01:40, John Yates wrote:
> For languages that do not distinguish declaration from definition,
> another alternative is to have both key bindings reference the same
> find-definition functionality.

I think I would generally prefer for the "find declarations" binding to 
end with an error when unsupported rather than repeat an existing 
command which is already accessible through an easier key binding.

Otherwise some users might waste time wondering over the difference, 
testing, and comparing -- I myself would, probably.

Anyway, the question is moot if we're going the way of dynamically 
detecting the set of possible navigations.

But I suppose some simpler languages might have no "extra" searches to 
suggest. I wouldn't necessarily oppose rebinding xref-find-extra in such 
major mode to something different, as long as the command is doing 
something related. The key bindings are a limited set, after all.