Re: [Emacs-diffs] emacs-25 504696d: Etags: yet another improvement in Ruby tags

[Dmitry Gutov]

On 02/05/2016 12:14 PM, Eli Zaretskii wrote:

> No.  What comes after the comma must begin with attr_SOMETHING or
> alias_method.  The issue being tested here is that we are not in a
> state where matches for these are being tried.

    alias_method :qux, :tee, attr_accessor(:bogus)

or

    alias_method :qux, :tee, alias_method(:bogus, :bogus2)

are the main options, I suppose. But they might also look misleading, 
and indicate that we don't support the paren-using syntax intentionally.

(It's another omission, but AFAICS nobody uses attr_XXX without parens 
in the context we're interested in.)

> But if you ever figure out how to do that with a less abnormal syntax,
> feel free to update the test files.

The problem with me updating the tests is I can't revert the 
corresponding fix and make sure that the test fails without it.

> It could also be a good idea to add a Rakefile or a Thorfile to the
> ruby-src directory (when I tested the change, I just renamed one of
> the other files).  It could be that those present special challenges,
> and in any case we should test the file-name rules.

I believe the file-name rules should be tested in a language-agnostic 
way, or just with one language. There's not much point in having all 
possible file names in test/etags. Or at least that's how I usually try 
to write tests: in as orthogonal way as possible.

> OK, thanks.  I guess we now have the "best etags in the West" (and in
> the East as well), as far as Ruby support is concerned.

You could say so.

It's definitely better than "Exuberant Ctags 5.9~svn20110310" I have 
installed through the default Ubuntu repositories.

It's better [0] than "Ctag Revival" [1], at least until they add support 
for qualified tags for Ruby [2], which could take a while.

We're probably better in some things, and worse in others, than "Ripper 
Tags" [3]. I haven't tried them yet myself.

In any case, it'll give me something to try using day-to-day, when we 
have at least some solution for tags being out of date (an experimental 
xref backend that simply rescans the whole project every time comes to 
mind).

[0] https://github.com/universal-ctags/ctags/issues/408
[1] https://github.com/universal-ctags/ctags
[2] https://github.com/universal-ctags/ctags/issues/524
[3] https://github.com/tmm1/ripper-tags/