Commit 8b18911a authored by Noam Postavsky's avatar Noam Postavsky

Signal error for symbol names with strange quotes (Bug#2967)

* src/lread.c (read1): Signal an error when a symbol starts with a
non-escaped quote-like character.
* test/src/lread-tests.el (lread-tests--funny-quote-symbols): New
test.
* etc/NEWS: Announce change.
parent 37954f39
......@@ -1154,6 +1154,10 @@ instead of its first.
renamed to 'lread--old-style-backquotes'. No user code should use
this variable.
** To avoid confusion caused by "smart quotes", the reader no longer
accepts Lisp symbols which begin with the following quotation
characters: ‘’‛“”‟〞"', unless they are escaped with backslash.
+++
** Module functions are now implemented slightly differently; in
particular, the function 'internal--module-call' has been removed.
......
......@@ -3479,6 +3479,24 @@ read1 (Lisp_Object readcharfun, int *pch, bool first_in_list)
if (! NILP (result))
return unbind_to (count, result);
}
if (!quoted && multibyte)
{
int ch = STRING_CHAR ((unsigned char *) read_buffer);
switch (ch)
{
case 0x2018: /* LEFT SINGLE QUOTATION MARK */
case 0x2019: /* RIGHT SINGLE QUOTATION MARK */
case 0x201B: /* SINGLE HIGH-REVERSED-9 QUOTATION MARK */
case 0x201C: /* LEFT DOUBLE QUOTATION MARK */
case 0x201D: /* RIGHT DOUBLE QUOTATION MARK */
case 0x201F: /* DOUBLE HIGH-REVERSED-9 QUOTATION MARK */
case 0x301E: /* DOUBLE PRIME QUOTATION MARK */
case 0xFF02: /* FULLWIDTH QUOTATION MARK */
case 0xFF07: /* FULLWIDTH APOSTROPHE */
xsignal2 (Qinvalid_read_syntax, build_string ("strange quote"),
CALLN (Fstring, make_number (ch)));
}
}
{
Lisp_Object result;
ptrdiff_t nbytes = p - read_buffer;
......
......@@ -142,6 +142,23 @@ literals (Bug#20852)."
"unescaped character literals "
"`?\"', `?(', `?)', `?;', `?[', `?]' detected!")))))
(ert-deftest lread-tests--funny-quote-symbols ()
"Check that 'smart quotes' or similar trigger errors in symbol names."
(dolist (quote-char
'(#x2018 ;; LEFT SINGLE QUOTATION MARK
#x2019 ;; RIGHT SINGLE QUOTATION MARK
#x201B ;; SINGLE HIGH-REVERSED-9 QUOTATION MARK
#x201C ;; LEFT DOUBLE QUOTATION MARK
#x201D ;; RIGHT DOUBLE QUOTATION MARK
#x201F ;; DOUBLE HIGH-REVERSED-9 QUOTATION MARK
#x301E ;; DOUBLE PRIME QUOTATION MARK
#xFF02 ;; FULLWIDTH QUOTATION MARK
#xFF07 ;; FULLWIDTH APOSTROPHE
))
(let ((str (format "%cfoo" quote-char)))
(should-error (read str) :type 'invalid-read-syntax)
(should (eq (read (concat "\\" str)) (intern str))))))
(ert-deftest lread-test-bug26837 ()
"Test for http://debbugs.gnu.org/26837 ."
(let ((load-path (cons
......
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