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authorNick Roberts <nickrob@snap.net.nz>2005-04-22 04:08:08 +0000
committerNick Roberts <nickrob@snap.net.nz>2005-04-22 04:08:08 +0000
commitf7f8f37aa6dde60f6c43f58ec3226799ef1892a3 (patch)
tree52396f8d4829cc3ca769b25a2486be9aded14069 /lisp/emacs-lisp/byte-run.el
parent727273e7e0a3b1cf8dce637d097416e4f1ba7e23 (diff)
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(define-obsolete-variable-alias): New macro.
Diffstat (limited to 'lisp/emacs-lisp/byte-run.el')
-rw-r--r--lisp/emacs-lisp/byte-run.el12
1 files changed, 12 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/byte-run.el b/lisp/emacs-lisp/byte-run.el
index 60fc862676d..ab7259b667f 100644
--- a/lisp/emacs-lisp/byte-run.el
+++ b/lisp/emacs-lisp/byte-run.el
@@ -129,6 +129,18 @@ was first made obsolete, for example a date or a release number."
(put variable 'byte-obsolete-variable (cons new when))
variable)
+(defmacro define-obsolete-variable-alias (variable new
+ &optional when docstring)
+ "Make VARIABLE a variable alias for NEW and warn that VARIABLE is obsolete.
+If provided, WHEN should be a string indicating when VARIABLE was
+first made obsolete, for example a date or a release number. The
+optional argument DOCSTRING specifies the documentation string
+for VARIABLE; if DOCSTRING is omitted or nil, VARIABLE uses the
+documentation string of NEW unless it already has one."
+ `(progn
+ (defvaralias ,variable ,new ,docstring)
+ (make-obsolete-variable ,variable ,new ,when)))
+
(defmacro dont-compile (&rest body)
"Like `progn', but the body always runs interpreted (not compiled).
If you think you need this, you're probably making a mistake somewhere."