From: Ivan Shmakov <ivan@siamics.net>
To: 18175@debbugs.gnu.org
Subject: bug#18175: files.el: use mapc in (mapcar 'switch-to-buffer ...)
Date: Sat, 02 Aug 2014 21:55:39 +0000 [thread overview]
Message-ID: <87r40yftes.fsf@violet.siamics.net> (raw)
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Package: emacs
Severity: wishlist
Given that switch-to-buffer returns its argument, /and/ given
that mapc returns the sequence it’s given, I suggest that the
(mapcar 'switch-to-buffer LIST) forms in lisp/files.el be
replaced with (mapc 'switch-to-buffer LIST), – if only to avoid
the unnecessary consing when the list is effectively copied in
the mapcar case.
The lists mapcar is applied to in such cases are returned from
find-file-noselect, and so, as it seems, are “fresh” ones
anyway.
A possible patch is MIMEd.
--
FSF associate member #7257 http://boycottsystemd.org/ … 3013 B6A0 230E 334A
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diff --git a/lisp/files.el b/lisp/files.el
index 9272e98..e604ce7 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -1428,7 +1428,7 @@ automatically choosing a major mode, use \\[find-file-literally]."
(confirm-nonexistent-file-or-buffer)))
(let ((value (find-file-noselect filename nil nil wildcards)))
(if (listp value)
- (mapcar 'switch-to-buffer (nreverse value))
+ (mapc 'switch-to-buffer (nreverse value))
(switch-to-buffer value))))
(defun find-file-other-window (filename &optional wildcards)
@@ -1451,7 +1451,7 @@ expand wildcards (if any) and visit multiple files."
(progn
(setq value (nreverse value))
(cons (switch-to-buffer-other-window (car value))
- (mapcar 'switch-to-buffer (cdr value))))
+ (mapc 'switch-to-buffer (cdr value))))
(switch-to-buffer-other-window value))))
(defun find-file-other-frame (filename &optional wildcards)
@@ -1474,7 +1474,7 @@ expand wildcards (if any) and visit multiple files."
(progn
(setq value (nreverse value))
(cons (switch-to-buffer-other-frame (car value))
- (mapcar 'switch-to-buffer (cdr value))))
+ (mapc 'switch-to-buffer (cdr value))))
(switch-to-buffer-other-frame value))))
(defun find-file-existing (filename)
next reply other threads:[~2014-08-02 21:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-02 21:55 Ivan Shmakov [this message]
2014-08-03 0:55 ` bug#18175: files.el: use mapc in (mapcar 'switch-to-buffer ...) Drew Adams
2014-08-03 8:55 ` Ivan Shmakov
2014-08-03 16:32 ` Drew Adams
2014-08-03 18:25 ` Ivan Shmakov
2014-08-03 18:43 ` Drew Adams
2014-08-06 17:26 ` Stefan Monnier
2014-08-07 19:15 ` Ivan Shmakov
2014-08-07 19:29 ` Stefan Monnier
2015-01-23 15:27 ` Ivan Shmakov
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