Re: Adding support for xref jumping to headers/interfaces

[João Távora]

Dmitry Gutov <dgutov@yandex.ru> writes:

> On 11/03/2023 00:18, João Távora wrote:
>> So, unless we are talking about the case were absolutely 0
>> "extras" are supported in M-x xref-find-extra
>
> I think we are.

Ah, great.  In that case, sth like `(user-error "unsupported")` is fine,
for interactive calls to xref-find-extra.  For lisp calls you can make
the function return nil instead, so users like Ergus can code up their
desired fallback behaviour in a new command.

João