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bug#34908: Push mark in xref-push-marker-stack


From: Dmitry Gutov
Subject: bug#34908: Push mark in xref-push-marker-stack
Date: Tue, 19 Mar 2019 01:14:26 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1

On 18.03.2019 23:12, Juri Linkov wrote:
X-Debbugs-CC: João Távora <address@hidden>, Dmitry Gutov <address@hidden>

Shouldn't xref-push-marker-stack push the mark like all normal commands do?

It's not a command, though. Right?

I know there is ‘M-,’ but why not allow using the standard keys
‘C-x C-SPC’ (pop-global-mark) and ‘C-u C-SPC’ (in the same file)
as well?

IMO that separation of marks between local and global ones, and navigation between them (where you have to remember whether your previous navigation was between files or inside one file) is extremely counter-intuitive, so I don't have a lot of experience with that facility.

Even so, I think it's been nice enough that every command can choose whether it pushes the mark to the local/global buffer rights, and/or it adds it to the xref marker stack. Do we have any particular guidelines in the manual for when either should happen?

xref-push-marker-stack is used externally as well as a replacement for find-tag-marker-ring (which is now marked obsolete). And any command that replaced the usage of the latter with the former, and also intended to push mark, probably does as a separate action.

diff --git a/lisp/progmodes/xref.el b/lisp/progmodes/xref.el
index 6974d00048..861e24a85f 100644
--- a/lisp/progmodes/xref.el
+++ b/lisp/progmodes/xref.el
@@ -365,6 +365,7 @@ xref-set-marker-ring-length
(defun xref-push-marker-stack (&optional m)
    "Add point M (defaults to `point-marker') to the marker stack."
+  (push-mark nil t)
    (ring-insert xref--marker-ring (or m (point-marker))))

At the very least, it's missing a docstring update.





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