bug#28403: 25.2; find-tag works, but xref-find-definitions

[Dmitry Gutov]

On 9/10/17 5:29 PM, Eli Zaretskii wrote:

> > > Try adding `tag-symbol-match-p' to
> > > etags-xref-find-definitions-tag-order. This example should work then,
> > > but you'll get more false positives (like treating return types as
> > > function names).
>
> Dmitry, how about providing a more user-friendly customization to that
> effect?  As a "fire escape"?

We can turn etags-xref-find-definitions-tag-order into a defcustom, with 
descriptions of what every possible element means. Problems:

1) I have hard time imagining how we're going to have descriptions for 
both tag-exact-match-p and tag-implicit-name-match-p that are different 
and make sense to the user.

2) The user will have to find out about 
etags-xref-find-definitions-tag-order first anyway.

Or we could add a custom variable to xref with a higher-level meaning... 
that would require support from backends, then.