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Re: M-y in isearch mode

From: Leo
Subject: Re: M-y in isearch mode
Date: Tue, 03 May 2011 00:51:28 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3.50 (Mac OS X 10.6.7)

On 2011-05-03 00:27 +0800, Stefan Monnier wrote:
> Now that C-y is bound to isearch-yank-kill, it would indeed make sense
> for M-y to match the behavior of M-y outside isearch.
> But maybe for compatibility with old "finger memory", we should allow
> a M-y that does not follow isearch-yank-kill isearch-yank-pop.
> I.e. rather than signal a "previous isearch command was not a yank", we
> should simply turn it into an isearch-yank-kill.

Sounds good. Patch modified to this suggestion.

diff --git a/lisp/isearch.el b/lisp/isearch.el
index e59fb29a..04d41af2 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -472,7 +472,7 @@ (defvar isearch-mode-map
     (define-key map "\M-n" 'isearch-ring-advance)
     (define-key map "\M-p" 'isearch-ring-retreat)
-    (define-key map "\M-y" 'isearch-yank-kill)
+    (define-key map "\M-y" 'isearch-yank-pop)
     (define-key map "\M-\t" 'isearch-complete)
@@ -636,6 +636,8 @@ (defun isearch-forward (&optional regexp-p 
 Type \\[isearch-yank-line] to yank rest of line onto end of search string\
  and search for it.
 Type \\[isearch-yank-kill] to yank the last string of killed text.
+Type \\[isearch-yank-pop] to replace string just yanked into search prompt
+ with string killed before it.
 Type \\[isearch-quote-char] to quote control character to search for it.
 \\[isearch-abort] while searching or when search has failed cancels input\
  back to what has
@@ -1499,6 +1501,14 @@ (defun isearch-yank-kill ()
   (isearch-yank-string (current-kill 0)))
+(defun isearch-yank-pop ()
+  "Replace just-yanked search string with previously killed string."
+  (interactive)
+  (if (not (memq last-command '(isearch-yank-kill isearch-yank-pop)))
+      (isearch-yank-kill)
+    (isearch-pop-state)
+    (isearch-yank-string (current-kill 1))))
 (defun isearch-yank-x-selection ()
   "Pull current X selection into search string."

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