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bug#44611: Prefix arg for xref-goto-xref

From: Dmitry Gutov
Subject: bug#44611: Prefix arg for xref-goto-xref
Date: Fri, 13 Nov 2020 13:20:41 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

Hi Juri,

On 13.11.2020 10:18, Juri Linkov wrote:
I recall endless discussions about xref in the past.
But now I realized that xref-goto-xref just misses
an obvious thing, and nothing more is needed.

Sounds promising!

Like e.g. 'quit-window' allows using a prefix argument
to change its behavior by relying on (interactive "P"),
xref-goto-xref should do the same:

The proposed change is not quite the same (bury instead of kill), but if it really helps, go ahead.

Please also note that instead of 'C-u RET' you can use 'TAB' already: it's bound to xref-quit-and-goto-xref which calls xref-goto-xref with QUIT=t.

diff --git a/lisp/progmodes/xref.el b/lisp/progmodes/xref.el
index a1c4c08c26..e1dd6e56bb 100644
--- a/lisp/progmodes/xref.el
+++ b/lisp/progmodes/xref.el
@@ -600,9 +600,9 @@ xref--item-at-point
(defun xref-goto-xref (&optional quit)
    "Jump to the xref on the current line and select its window.
-Non-interactively, non-nil QUIT means to first quit the *xref*
-  (interactive)
+Non-interactively, non-nil QUIT, or interactively, with prefix argument
+means to first quit the *xref* buffer."
+  (interactive "P")
    (let* ((buffer (current-buffer))
           (xref (or (xref--item-at-point)
                     (user-error "No reference at point")))

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