They have been deprecated for a decade now.
* src/lread.c (Fload): Don't use record_unwind_protect to warn about
old-style backquotes any more. They now generate a hard error.
(read1): Signal an error when detecting old-style backquotes. Remove
unused label.
(syms_of_lread): Remove unused internal variable
'lread--old-style-backquotes'.
(load_error_old_style_backquotes): Rename from
'load_warn_oldstyle_backquotes'. Signal an error.
* lisp/emacs-lisp/bytecomp.el (byte-compile-from-buffer): Remove check
from byte compiler. It isn't triggered any more.
* test/src/lread-tests.el (lread-tests--old-style-backquotes): Adapt
unit test.
* test/lisp/emacs-lisp/bytecomp-tests.el
(bytecomp-tests--old-style-backquotes)
(bytecomp-tests-function-put): Adapt unit tests.
* etc/NEWS: Document change.
support, you should set 'eldoc-documentation-function' instead of
calling 'eldoc-message' directly.
+** Old-style backquotes now generate an error. They have been
+generating warnings for a decade.
+
\f
* Lisp Changes in Emacs 27.1
(not (eobp)))
(setq byte-compile-read-position (point)
byte-compile-last-position byte-compile-read-position)
- (let* ((lread--old-style-backquotes nil)
- (lread--unescaped-character-literals nil)
+ (let* ((lread--unescaped-character-literals nil)
(form (read inbuffer)))
- ;; Warn about the use of old-style backquotes.
- (when lread--old-style-backquotes
- (byte-compile-warn "!! The file uses old-style backquotes !!
-This functionality has been obsolete for more than 10 years already
-and will be removed soon. See (elisp)Backquote in the manual."))
(when lread--unescaped-character-literals
(byte-compile-warn
"unescaped character literals %s detected!"
return Qnil;
}
-static void
-load_warn_old_style_backquotes (Lisp_Object file)
+static _Noreturn void
+load_error_old_style_backquotes (void)
{
- if (!NILP (Vlread_old_style_backquotes))
- {
- AUTO_STRING (format, "Loading `%s': old-style backquotes detected!");
- CALLN (Fmessage, format, file);
- }
+ AUTO_STRING (format, "Loading `%s': old-style backquotes detected!");
+ xsignal1 (Qerror, CALLN (Fformat_message, format, Vload_file_name));
}
static void
version = -1;
- /* Check for the presence of old-style quotes and warn about them. */
- specbind (Qlread_old_style_backquotes, Qnil);
- record_unwind_protect (load_warn_old_style_backquotes, file);
-
/* Check for the presence of unescaped character literals and warn
about them. */
specbind (Qlread_unescaped_character_literals, Qnil);
first_in_list exception (old-style can still be obtained via
"(\`" anyway). */
if (!new_backquote_flag && first_in_list && next_char == ' ')
- {
- Vlread_old_style_backquotes = Qt;
- goto default_label;
- }
+ load_error_old_style_backquotes ();
else
{
Lisp_Object value;
return list2 (comma_type, value);
}
else
- {
- Vlread_old_style_backquotes = Qt;
- goto default_label;
- }
+ load_error_old_style_backquotes ();
}
case '?':
{
row. */
FALLTHROUGH;
default:
- default_label:
if (c <= 040) goto retry;
if (c == NO_BREAK_SPACE)
goto retry;
doc: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
Veval_buffer_list = Qnil;
- DEFVAR_LISP ("lread--old-style-backquotes", Vlread_old_style_backquotes,
- doc: /* Set to non-nil when `read' encounters an old-style backquote.
-For internal use only. */);
- Vlread_old_style_backquotes = Qnil;
- DEFSYM (Qlread_old_style_backquotes, "lread--old-style-backquotes");
-
DEFVAR_LISP ("lread--unescaped-character-literals",
Vlread_unescaped_character_literals,
doc: /* List of deprecated unescaped character literals encountered by `read'.
(ert-deftest bytecomp-tests--old-style-backquotes ()
"Check that byte compiling warns about old-style backquotes."
- (should (boundp 'lread--old-style-backquotes))
(bytecomp-tests--with-temp-file source
(write-region "(` (a b))" nil source)
(bytecomp-tests--with-temp-file destination
(let* ((byte-compile-dest-file-function (lambda (_) destination))
- (byte-compile-error-on-warn t)
- (byte-compile-debug t)
- (err (should-error (byte-compile-file source))))
+ (byte-compile-debug t)
+ (err (should-error (byte-compile-file source))))
(should (equal (cdr err)
- (list "!! The file uses old-style backquotes !!
-This functionality has been obsolete for more than 10 years already
-and will be removed soon. See (elisp)Backquote in the manual.")))))))
+ '("Loading `nil': old-style backquotes detected!")))))))
(ert-deftest bytecomp-tests-function-put ()
"Check `function-put' operates during compilation."
- (should (boundp 'lread--old-style-backquotes))
(bytecomp-tests--with-temp-file source
(dolist (form '((function-put 'bytecomp-tests--foo 'foo 1)
(function-put 'bytecomp-tests--foo 'bar 2)
(should (string-suffix-p "/somelib.el" (caar load-history)))))
(ert-deftest lread-tests--old-style-backquotes ()
- "Check that loading warns about old-style backquotes."
+ "Check that loading doesn't accept old-style backquotes."
(lread-tests--with-temp-file file-name
(write-region "(` (a b))" nil file-name)
- (should (equal (load file-name nil :nomessage :nosuffix) t))
- (should (equal (lread-tests--last-message)
- (concat (format-message "Loading `%s': " file-name)
- "old-style backquotes detected!")))))
+ (let ((data (should-error (load file-name nil :nomessage :nosuffix))))
+ (should (equal (cdr data)
+ (list (concat (format-message "Loading `%s': " file-name)
+ "old-style backquotes detected!")))))))
(ert-deftest lread-lread--substitute-object-in-subtree ()
(let ((x (cons 0 1)))