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-rw-r--r--lisp/emacs-lisp/byte-run.el7
1 files changed, 7 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/byte-run.el b/lisp/emacs-lisp/byte-run.el
index a377ec395e1..3e4e4d12cc8 100644
--- a/lisp/emacs-lisp/byte-run.el
+++ b/lisp/emacs-lisp/byte-run.el
@@ -494,6 +494,11 @@ convention was modified."
Return t if there isn't any."
(gethash function advertised-signature-table t))
+(defun byte-run--constant-obsolete-warning (obsolete-name)
+ (if (memq obsolete-name '(nil t))
+ (error "Can't make `%s' obsolete; did you forget a quote mark?"
+ obsolete-name)))
+
(defun make-obsolete (obsolete-name current-name when)
"Make the byte-compiler warn that function OBSOLETE-NAME is obsolete.
OBSOLETE-NAME should be a function name or macro name (a symbol).
@@ -503,6 +508,7 @@ If CURRENT-NAME is a string, that is the `use instead' message
\(it should end with a period, and not start with a capital).
WHEN should be a string indicating when the function
was first made obsolete, for example a date or a release number."
+ (byte-run--constant-obsolete-warning obsolete-name)
(put obsolete-name 'byte-obsolete-info
;; The second entry used to hold the `byte-compile' handler, but
;; is not used any more nowadays.
@@ -539,6 +545,7 @@ WHEN should be a string indicating when the variable
was first made obsolete, for example a date or a release number.
ACCESS-TYPE if non-nil should specify the kind of access that will trigger
obsolescence warnings; it can be either `get' or `set'."
+ (byte-run--constant-obsolete-warning obsolete-name)
(put obsolete-name 'byte-obsolete-variable
(purecopy (list current-name access-type when)))
obsolete-name)