* bug#69293: 30.0.50; cc-mode doesn't support "if consteval"
@ 2024-02-20 20:21 Herman, Géza
2024-02-22 13:18 ` Eli Zaretskii
2024-03-22 13:34 ` Alan Mackenzie
0 siblings, 2 replies; 6+ messages in thread
From: Herman, Géza @ 2024-02-20 20:21 UTC (permalink / raw)
To: 69293
C++ has a new feature, "if consteval". So one can write code like
if consteval {
// do something
} else {
// do something else
}
The problem is that cc-mode doesn't recognize this construct, lines
are not indented correctly: the "// do something" and the "} else {"
receive an additional level of indentation.
In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, cairo version
1.18.0) of 2023-11-29 built on okoska
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^ permalink raw reply [flat|nested] 6+ messages in thread* bug#69293: 30.0.50; cc-mode doesn't support "if consteval" 2024-02-20 20:21 bug#69293: 30.0.50; cc-mode doesn't support "if consteval" Herman, Géza @ 2024-02-22 13:18 ` Eli Zaretskii 2024-02-25 16:52 ` Alan Mackenzie 2024-03-22 13:34 ` Alan Mackenzie 1 sibling, 1 reply; 6+ messages in thread From: Eli Zaretskii @ 2024-02-22 13:18 UTC (permalink / raw) To: Herman, Géza, Alan Mackenzie; +Cc: 69293 > From: Herman@debbugs.gnu.org, Géza <geza.herman@gmail.com> > Date: Tue, 20 Feb 2024 21:21:27 +0100 > > > C++ has a new feature, "if consteval". So one can write code like > > if consteval { > // do something > } else { > // do something else > } > > The problem is that cc-mode doesn't recognize this construct, lines > are not indented correctly: the "// do something" and the "} else {" > receive an additional level of indentation. Alan, could you please look into this? ^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#69293: 30.0.50; cc-mode doesn't support "if consteval" 2024-02-22 13:18 ` Eli Zaretskii @ 2024-02-25 16:52 ` Alan Mackenzie 0 siblings, 0 replies; 6+ messages in thread From: Alan Mackenzie @ 2024-02-25 16:52 UTC (permalink / raw) To: Eli Zaretskii; +Cc: 69293, Géza, Herman Hello, Eli. On Thu, Feb 22, 2024 at 15:18:28 +0200, Eli Zaretskii wrote: > > From: Herman@debbugs.gnu.org, Géza <geza.herman@gmail.com> > > Date: Tue, 20 Feb 2024 21:21:27 +0100 > > C++ has a new feature, "if consteval". So one can write code like > > if consteval { > > // do something > > } else { > > // do something else > > } > > The problem is that cc-mode doesn't recognize this construct, lines > > are not indented correctly: the "// do something" and the "} else {" > > receive an additional level of indentation. > Alan, could you please look into this? Yes, I will. Thanks for the forwarding! -- Alan Mackenzie (Nuremberg, Germany). ^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#69293: 30.0.50; cc-mode doesn't support "if consteval" 2024-02-20 20:21 bug#69293: 30.0.50; cc-mode doesn't support "if consteval" Herman, Géza 2024-02-22 13:18 ` Eli Zaretskii @ 2024-03-22 13:34 ` Alan Mackenzie 2024-03-25 9:37 ` Herman, Géza 1 sibling, 1 reply; 6+ messages in thread From: Alan Mackenzie @ 2024-03-22 13:34 UTC (permalink / raw) To: Herman, Géza; +Cc: acm, 69293 Hello, Géza. Sorry it's taken a long time to respond. I've been unwell. On Tue, Feb 20, 2024 at 21:21:27 +0100, Herman wrote: > C++ has a new feature, "if consteval". So one can write code like > if consteval { > // do something > } else { > // do something else > } Yes, indeed. Maybe I'm the only person to think so, but I think it's a horrible distortion of C syntax. Anyway ... > The problem is that cc-mode doesn't recognize this construct, lines > are not indented correctly: the "// do something" and the "} else {" > receive an additional level of indentation. Would you please try out the patch below on your Emacs, then byte compile CC Mode in its entirety (there are new macros) then load it into a running Emacs (or restart Emacs). cc-mode is in .../lisp/progmodes. Then please let me know how well it fixes the bug. Thanks! > In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, cairo version > 1.18.0) of 2023-11-29 built on okoska > Repository revision: 47837b3863deba274f16960f1ee9fde4acb9d5a1 > Repository branch: my-modifications > Windowing system distributor 'The X.Org Foundation', version 11.0.12101008 > System Description: Debian GNU/Linux trixie/sid [ .... ] diff -r 779141971296 cc-engine.el --- a/cc-engine.el Sun Dec 31 10:45:58 2023 +0000 +++ b/cc-engine.el Fri Mar 22 12:54:39 2024 +0000 @@ -12365,13 +12365,21 @@ (zerop (c-backward-token-2 1 t lim)) t) (or (looking-at c-block-stmt-1-key) - (and (eq (char-after) ?\() - (zerop (c-backward-token-2 1 t lim)) - (if (looking-at c-block-stmt-hangon-key) - (zerop (c-backward-token-2 1 t lim)) - t) - (or (looking-at c-block-stmt-2-key) - (looking-at c-block-stmt-1-2-key)))) + (or + (and + (eq (char-after) ?\() + (zerop (c-backward-token-2 1 t lim)) + (if (looking-at c-block-stmt-hangon-key) + (zerop (c-backward-token-2 1 t lim)) + t) + (or (looking-at c-block-stmt-2-key) + (looking-at c-block-stmt-1-2-key))) + (and (looking-at c-paren-clause-key) + (zerop (c-backward-token-2 1 t lim)) + (if (looking-at c-negation-op-re) + (zerop (c-backward-token-2 1 t lim)) + t) + (looking-at c-block-stmt-with-key)))) (point)))) (defun c-after-special-operator-id (&optional lim) diff -r 779141971296 cc-langs.el --- a/cc-langs.el Sun Dec 31 10:45:58 2023 +0000 +++ b/cc-langs.el Fri Mar 22 12:54:39 2024 +0000 @@ -1583,6 +1583,12 @@ (c-lang-defvar c-assignment-op-regexp (c-lang-const c-assignment-op-regexp)) +(c-lang-defconst c-negation-op-re + ;; Regexp matching the negation operator. + t "!\\([^=]\\|$\\)") + +(c-lang-defvar c-negation-op-re (c-lang-const c-negation-op-re)) + (c-lang-defconst c-arithmetic-operators "List of all arithmetic operators, including \"+=\", etc." ;; Note: in the following, there are too many operators for AWK and IDL. @@ -3149,6 +3155,30 @@ (c-lang-const c-block-stmt-2-kwds))))) (c-lang-defvar c-opt-block-stmt-key (c-lang-const c-opt-block-stmt-key)) +(c-lang-defconst c-paren-clause-kwds + "Keywords which can stand in the place of paren sexps in conditionals. +This applies only to conditionals in `c-block-stmt-with-kwds'." + t nil + c++ '("consteval")) + +(c-lang-defconst c-paren-clause-key + ;; Regexp matching a keyword in `c-paren-clause-kwds'. + t (c-make-keywords-re t + (c-lang-const c-paren-clause-kwds))) +(c-lang-defvar c-paren-clause-key (c-lang-const c-paren-clause-key)) + +(c-lang-defconst c-block-stmt-with-kwds + "Statement keywords which can be followed by a keyword instead of a parens. +Such a keyword is a member of `c-paren-clause-kwds." + t nil + c++ '("if")) + +(c-lang-defconst c-block-stmt-with-key + ;; Regexp matching a keyword in `c-block-stmt-with-kwds'. + t (c-make-keywords-re t + (c-lang-const c-block-stmt-with-kwds))) +(c-lang-defvar c-block-stmt-with-key (c-lang-const c-block-stmt-with-key)) + (c-lang-defconst c-simple-stmt-kwds "Statement keywords followed by an expression or nothing." t '("break" "continue" "goto" "return") -- Alan Mackenzie (Nuremberg, Germany). ^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#69293: 30.0.50; cc-mode doesn't support "if consteval" 2024-03-22 13:34 ` Alan Mackenzie @ 2024-03-25 9:37 ` Herman, Géza 2024-03-26 21:12 ` Alan Mackenzie 0 siblings, 1 reply; 6+ messages in thread From: Herman, Géza @ 2024-03-25 9:37 UTC (permalink / raw) To: Alan Mackenzie; +Cc: 69293 Hi Alan, I agree, "if consteval" looks weird indeed. With your patch, "if consteval" indents correctly. I used cc-mode with your patch for a day, haven't noticed any newly introduced bugs. Thank you, and get better! Géza Alan Mackenzie <acm@muc.de> writes: > Hello, Géza. > > Sorry it's taken a long time to respond. I've been unwell. > > On Tue, Feb 20, 2024 at 21:21:27 +0100, Herman wrote: > >> C++ has a new feature, "if consteval". So one can write code >> like > >> if consteval { >> // do something >> } else { >> // do something else >> } > > Yes, indeed. Maybe I'm the only person to think so, but I think > it's a > horrible distortion of C syntax. Anyway ... > >> The problem is that cc-mode doesn't recognize this construct, >> lines >> are not indented correctly: the "// do something" and the "} >> else {" >> receive an additional level of indentation. > > Would you please try out the patch below on your Emacs, then > byte > compile CC Mode in its entirety (there are new macros) then load > it into > a running Emacs (or restart Emacs). cc-mode is in > .../lisp/progmodes. > > Then please let me know how well it fixes the bug. Thanks! > >> In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, cairo >> version >> 1.18.0) of 2023-11-29 built on okoska >> Repository revision: 47837b3863deba274f16960f1ee9fde4acb9d5a1 >> Repository branch: my-modifications >> Windowing system distributor 'The X.Org Foundation', version >> 11.0.12101008 >> System Description: Debian GNU/Linux trixie/sid > > [ .... ] > > > > diff -r 779141971296 cc-engine.el > --- a/cc-engine.el Sun Dec 31 10:45:58 2023 +0000 > +++ b/cc-engine.el Fri Mar 22 12:54:39 2024 +0000 > @@ -12365,13 +12365,21 @@ > (zerop (c-backward-token-2 1 t lim)) > t) > (or (looking-at c-block-stmt-1-key) > - (and (eq (char-after) ?\() > - (zerop (c-backward-token-2 1 t lim)) > - (if (looking-at c-block-stmt-hangon-key) > - (zerop (c-backward-token-2 1 t lim)) > - t) > - (or (looking-at c-block-stmt-2-key) > - (looking-at c-block-stmt-1-2-key)))) > + (or > + (and > + (eq (char-after) ?\() > + (zerop (c-backward-token-2 1 t lim)) > + (if (looking-at c-block-stmt-hangon-key) > + (zerop (c-backward-token-2 1 t lim)) > + t) > + (or (looking-at c-block-stmt-2-key) > + (looking-at c-block-stmt-1-2-key))) > + (and (looking-at c-paren-clause-key) > + (zerop (c-backward-token-2 1 t lim)) > + (if (looking-at c-negation-op-re) > + (zerop (c-backward-token-2 1 t lim)) > + t) > + (looking-at c-block-stmt-with-key)))) > (point)))) > > (defun c-after-special-operator-id (&optional lim) > diff -r 779141971296 cc-langs.el > --- a/cc-langs.el Sun Dec 31 10:45:58 2023 +0000 > +++ b/cc-langs.el Fri Mar 22 12:54:39 2024 +0000 > @@ -1583,6 +1583,12 @@ > (c-lang-defvar c-assignment-op-regexp > (c-lang-const c-assignment-op-regexp)) > > +(c-lang-defconst c-negation-op-re > + ;; Regexp matching the negation operator. > + t "!\\([^=]\\|$\\)") > + > +(c-lang-defvar c-negation-op-re (c-lang-const > c-negation-op-re)) > + > (c-lang-defconst c-arithmetic-operators > "List of all arithmetic operators, including \"+=\", etc." > ;; Note: in the following, there are too many operators for > AWK and IDL. > @@ -3149,6 +3155,30 @@ > (c-lang-const c-block-stmt-2-kwds))))) > (c-lang-defvar c-opt-block-stmt-key (c-lang-const > c-opt-block-stmt-key)) > > +(c-lang-defconst c-paren-clause-kwds > + "Keywords which can stand in the place of paren sexps in > conditionals. > +This applies only to conditionals in `c-block-stmt-with-kwds'." > + t nil > + c++ '("consteval")) > + > +(c-lang-defconst c-paren-clause-key > + ;; Regexp matching a keyword in `c-paren-clause-kwds'. > + t (c-make-keywords-re t > + (c-lang-const c-paren-clause-kwds))) > +(c-lang-defvar c-paren-clause-key (c-lang-const > c-paren-clause-key)) > + > +(c-lang-defconst c-block-stmt-with-kwds > + "Statement keywords which can be followed by a keyword > instead of a parens. > +Such a keyword is a member of `c-paren-clause-kwds." > + t nil > + c++ '("if")) > + > +(c-lang-defconst c-block-stmt-with-key > + ;; Regexp matching a keyword in `c-block-stmt-with-kwds'. > + t (c-make-keywords-re t > + (c-lang-const c-block-stmt-with-kwds))) > +(c-lang-defvar c-block-stmt-with-key (c-lang-const > c-block-stmt-with-key)) > + > (c-lang-defconst c-simple-stmt-kwds > "Statement keywords followed by an expression or nothing." > t '("break" "continue" "goto" "return") ^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#69293: 30.0.50; cc-mode doesn't support "if consteval" 2024-03-25 9:37 ` Herman, Géza @ 2024-03-26 21:12 ` Alan Mackenzie 0 siblings, 0 replies; 6+ messages in thread From: Alan Mackenzie @ 2024-03-26 21:12 UTC (permalink / raw) To: Herman, Géza; +Cc: 69293-done Hello, Géza. On Mon, Mar 25, 2024 at 10:37:14 +0100, Herman, Géza wrote: > Hi Alan, > I agree, "if consteval" looks weird indeed. > With your patch, "if consteval" indents correctly. I used cc-mode > with your patch for a day, haven't noticed any newly introduced > bugs. Thanks for doing the testing. I've now committed the patch and I'm closing the bug with this post. > Thank you, and get better! > Géza > Alan Mackenzie <acm@muc.de> writes: [ .... ] -- Alan Mackenzie (Nuremberg, Germany). ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2024-03-26 21:12 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2024-02-20 20:21 bug#69293: 30.0.50; cc-mode doesn't support "if consteval" Herman, Géza 2024-02-22 13:18 ` Eli Zaretskii 2024-02-25 16:52 ` Alan Mackenzie 2024-03-22 13:34 ` Alan Mackenzie 2024-03-25 9:37 ` Herman, Géza 2024-03-26 21:12 ` Alan Mackenzie
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