public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword
@ 2023-05-26 16:31 redi at gcc dot gnu.org
2023-05-26 16:34 ` [Bug preprocessor/109994] " mpolacek at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: redi at gcc dot gnu.org @ 2023-05-26 16:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
Bug ID: 109994
Summary: Issue a diagnostic when a C++ file defines a macro
that hides a keyword
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
The C++ standard says this is undefined:
#define new foo
It might be nice if the preprocessor had a warning about it.
[macro.names]
A translation unit shall not #define or #undef names lexically identical to
keywords, to the identifiers listed in Table 4, or to the attribute-tokens
described in 9.12, except that the names likely and unlikely may be defined as
function-like macros (15.6).
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug preprocessor/109994] Issue a diagnostic when a C++ file defines a macro that hides a keyword
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
@ 2023-05-26 16:34 ` mpolacek at gcc dot gnu.org
2023-05-26 16:40 ` pinskia at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2023-05-26 16:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
CC| |mpolacek at gcc dot gnu.org
Last reconfirmed| |2023-05-26
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug preprocessor/109994] Issue a diagnostic when a C++ file defines a macro that hides a keyword
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
2023-05-26 16:34 ` [Bug preprocessor/109994] " mpolacek at gcc dot gnu.org
@ 2023-05-26 16:40 ` pinskia at gcc dot gnu.org
2023-05-26 16:41 ` redi at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-05-26 16:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There are definitly testcases in GCC's testsuite which does this all the time.
#define int ...
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug preprocessor/109994] Issue a diagnostic when a C++ file defines a macro that hides a keyword
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
2023-05-26 16:34 ` [Bug preprocessor/109994] " mpolacek at gcc dot gnu.org
2023-05-26 16:40 ` pinskia at gcc dot gnu.org
@ 2023-05-26 16:41 ` redi at gcc dot gnu.org
2023-05-26 16:42 ` jakub at gcc dot gnu.org
2024-01-21 22:22 ` redi at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: redi at gcc dot gnu.org @ 2023-05-26 16:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> There are definitly testcases in GCC's testsuite which does this all the
> time.
> #define int ...
Yeah, it shouldn't be in -Wall, and it's not a required diagnostic for
conformance. But it might be nice. Not a priority though.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/109994] Issue a diagnostic when a C++ file defines a macro that hides a keyword
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
` (2 preceding siblings ...)
2023-05-26 16:41 ` redi at gcc dot gnu.org
@ 2023-05-26 16:42 ` jakub at gcc dot gnu.org
2024-01-21 22:22 ` redi at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-05-26 16:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not just testcases, libgcc.h does that too (though, sure, that is C).
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug preprocessor/109994] Issue a diagnostic when a C++ file defines a macro that hides a keyword
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
` (3 preceding siblings ...)
2023-05-26 16:42 ` jakub at gcc dot gnu.org
@ 2024-01-21 22:22 ` redi at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: redi at gcc dot gnu.org @ 2024-01-21 22:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109994
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 113532 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2024-01-21 22:22 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-05-26 16:31 [Bug preprocessor/109994] New: Issue a diagnostic when a C++ file defines a macro that hides a keyword redi at gcc dot gnu.org
2023-05-26 16:34 ` [Bug preprocessor/109994] " mpolacek at gcc dot gnu.org
2023-05-26 16:40 ` pinskia at gcc dot gnu.org
2023-05-26 16:41 ` redi at gcc dot gnu.org
2023-05-26 16:42 ` jakub at gcc dot gnu.org
2024-01-21 22:22 ` redi at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).