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* [Bug c++/97820] New: VLAs in function declarations fail to compile
@ 2020-11-13 20:04 josephcsible at gmail dot com
2020-11-19 18:35 ` [Bug c++/97820] " mpolacek at gcc dot gnu.org
2024-03-30 19:18 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: josephcsible at gmail dot com @ 2020-11-13 20:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97820
Bug ID: 97820
Summary: VLAs in function declarations fail to compile
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: josephcsible at gmail dot com
Target Milestone: ---
Consider these 4 attempts at declaring a function:
void f1(int rows, int cols, int arr[rows][cols]);
void f2(int rows, int cols, int (*arr)[cols]);
void f3(int, int, int [*][*]);
void f4(int, int, int (*)[*]);
When I compile them with g++, they all have errors:
<source>:1:41: error: use of parameter outside function body before ']' token
1 | void f1(int rows, int cols, int arr[rows][cols]);
| ^
<source>:1:47: error: use of parameter outside function body before ']' token
1 | void f1(int rows, int cols, int arr[rows][cols]);
| ^
<source>:2:44: error: use of parameter outside function body before ']' token
2 | void f2(int rows, int cols, int (*arr)[cols]);
| ^
<source>:3:25: error: expected primary-expression before ']' token
3 | void f3(int, int, int [*][*]);
| ^
<source>:3:28: error: expected primary-expression before ']' token
3 | void f3(int, int, int [*][*]);
| ^
<source>:4:28: error: expected primary-expression before ']' token
4 | void f4(int, int, int (*)[*]);
| ^
Since we support VLAs in C++ as an extension, I expected that all of these
would work.
https://godbolt.org/z/Wca9ra
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/97820] VLAs in function declarations fail to compile
2020-11-13 20:04 [Bug c++/97820] New: VLAs in function declarations fail to compile josephcsible at gmail dot com
@ 2020-11-19 18:35 ` mpolacek at gcc dot gnu.org
2024-03-30 19:18 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-11-19 18:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97820
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-11-19
CC| |mpolacek at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. Not a regression.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/97820] VLAs in function declarations fail to compile
2020-11-13 20:04 [Bug c++/97820] New: VLAs in function declarations fail to compile josephcsible at gmail dot com
2020-11-19 18:35 ` [Bug c++/97820] " mpolacek at gcc dot gnu.org
@ 2024-03-30 19:18 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-03-30 19:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97820
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=51352
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This might be a dup of bug 51352 .
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-03-30 19:18 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-11-13 20:04 [Bug c++/97820] New: VLAs in function declarations fail to compile josephcsible at gmail dot com
2020-11-19 18:35 ` [Bug c++/97820] " mpolacek at gcc dot gnu.org
2024-03-30 19:18 ` pinskia at gcc dot gnu.org
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