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bug#53260: closed (char-syntax differs in interpreter and bytecode)
From: |
GNU bug Tracking System |
Subject: |
bug#53260: closed (char-syntax differs in interpreter and bytecode) |
Date: |
Thu, 20 Jan 2022 10:48:02 +0000 |
Your message dated Thu, 20 Jan 2022 11:47:01 +0100
with message-id <748AD547-562F-495C-9BEC-D406953CFE4D@acm.org>
and subject line Re: bug#53260: char-syntax differs in interpreter and bytecode
[PATCH]
has caused the debbugs.gnu.org bug report #53260,
regarding char-syntax differs in interpreter and bytecode
to be marked as done.
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help-debbugs@gnu.org.)
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53260: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=53260
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--- Begin Message ---
Subject: |
char-syntax differs in interpreter and bytecode |
Date: |
Fri, 14 Jan 2022 17:43:00 +0100 |
Fchar_syntax and the bytecode Bchar_syntax differ:
Fchar_syntax calls SETUP_BUFFER_SYNTAX_TABLE. Bchar_syntax does not.
Bchar_syntax converts arguments to multibyte. Fchar_syntax does not.
The last property can be used to get different behaviour:
(let ((cs (byte-compile (lambda (x) (char-syntax x)))))
(with-temp-buffer
(let ((st (make-syntax-table)))
(set-buffer-multibyte nil)
(modify-syntax-entry 128 "_" st)
(set-syntax-table st)
(list (funcall cs 128) (char-syntax 128)))))
-> (119 95)
Not sure how to expose the presence or absence of SETUP_BUFFER_SYNTAX_TABLE.
Suggestions?
And, most importantly, what would be the correct code?
(I suppose char-syntax is rare enough that we could call Fchar_syntax from
Bchar_syntax and thus avoid any future divergence.)
--- End Message ---
--- Begin Message ---
Subject: |
Re: bug#53260: char-syntax differs in interpreter and bytecode [PATCH] |
Date: |
Thu, 20 Jan 2022 11:47:01 +0100 |
20 jan. 2022 kl. 10.30 skrev Lars Ingebrigtsen <larsi@gnus.org>:
> Makes sense to me. Unless Stefan has any further comments, please go
> ahead and push.
Thank you, pushed with a necessary modification: SETUP_BUFFER_SYNTAX_TABLE() is
indeed necessary in Fchar_syntax because syntax.c has its own local #define
SYNTAX() and doesn't use the one in syntax.h. Lovely.
--- End Message ---
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