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bug#19466: 25.0.50; xref-find-def doesn't find C functions


From: Dmitry Gutov
Subject: bug#19466: 25.0.50; xref-find-def doesn't find C functions
Date: Mon, 19 Jan 2015 05:31:03 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Thunderbird/33.0

On 01/16/2015 09:47 AM, martin rudalics wrote:

so I think you should push the `quit-window' based solution to trunk
(which, from the few testing I gave it, seems to handle this case well).

Pushed. I'd really like you to look at the implementation, though.

One thing that has annoyed me ever since is the buffers that pile up
while browsing tags.  I always dreamt of a good heuristic to get rid of

I thought of that problem too, but it seems less important than willy-nilly changing the window configuration, hence the currently discussed attempt to alleviate it.

them.  Maybe you could try making provisions like

(1) this buffer is killable because it has been probably visited
     exclusively by and only accidentally during xrefing, and

(2) have the command that quits the *xref* buffer optionally kill the
     buffers marked in (1).

`xref--quit' could definitely be used for it.

A heuristic for (1) could go as follows:

   The buffer was created during xrefing, the window was never selected
   while it showed that buffer and either its buffer was "immediately"
   replaced by another xrefed one or `xref--quit' was invoked.

One question is, how will we know that if was never selected? Use a window-configuration-change-hook? Do we keep the newly added value there indefinitely, or when will `remove-hook' be called if the user never presses `q' in the xref buffer?

Overall, solving both problems would be easier if xref used a more restricting interface which would never allow to switch to the temporarily displayed buffers until the user made their choice (but sure, they could scroll the other window).

Maybe with `Electric-command-loop'.

You might also consider setting `other-window-scroll-buffer' to the
window used by `xref-show-location-at-point'.

martin, who'd prefer (user-error "No reference at point")

Done.





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