From: Kim F. Storm <storm@cua.dk>
Date: Wed, 22 Jun 2005 23:18:45 +0000 (+0000)
Subject: (save-match-data): Add comment about using evaporate arg
X-Git-Tag: emacs-pretest-22.0.90~8735
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=d1fab151dfb28b8f423b7cfa35cf5f8e3f731461;p=emacs.git

(save-match-data): Add comment about using evaporate arg
to set-match-data.
---

diff --git a/lisp/subr.el b/lisp/subr.el
index 15c23ebc81b..cb8006c10a7 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -2020,6 +2020,8 @@ The value returned is the value of the last form in BODY."
 	'((save-match-data-internal (match-data)))
 	(list 'unwind-protect
 	      (cons 'progn body)
+	      ;; It is safe to free (evaporate) markers immediately here,
+	      ;; as Lisp programs should not copy from save-match-data-internal.
 	      '(set-match-data save-match-data-internal 'evaporate))))
 
 (defun match-string (num &optional string)
diff --git a/src/ChangeLog b/src/ChangeLog
index 659f1066efc..72890cbc545 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2005-06-23  Kim F. Storm  <storm@cua.dk>
+
+	* search.c (Fmatch_data): Remove evaporate option.
+	(Fmatch_data): Do not mention evaporate option in doc string.
+	Add commentary explaining evaporate arg (for internal use only).
+	(unwind_set_match_data): Add comment on evaporate use.
+
 2005-06-22  Miles Bader  <miles@gnu.org>
 
 	* xfaces.c (Qvertical_border): Renamed from `Qvertical_divider'.