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* [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept
@ 2021-01-10 5:12 iDingDong at outlook dot com
2021-08-17 8:53 ` [Bug c++/98614] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: iDingDong at outlook dot com @ 2021-01-10 5:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
Bug ID: 98614
Summary: Copy ctor/assign cannot be defaulted in specialization
by concept
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iDingDong at outlook dot com
Target Milestone: ---
GCC 10.2 rejects the following piece of code:
//---
#include <concepts>
template <typename T> struct A {
A(A<T> const&) = default;
};
template <std::same_as<int> T> struct A<T> {
A(A<T> const&) = default;
};
//---
The error message:
> <source>:8:19: error: 'A<T>::A(const A<T>&)' cannot be defaulted
This can be reproduced by the compiler explorer: https://godbolt.org/z/1v6nPv
I can locally reproduce this with:
> g++ -std=c++20 test.cpp
This error only occurs when trying to default a copy constructor in a partial
specialization involving concept. The workaround is to omit the `<T>` in the
constructor/assignment's argument declarator.
PS: move constructor/assignment seems unaffected.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98614] Copy ctor/assign cannot be defaulted in specialization by concept
2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
@ 2021-08-17 8:53 ` pinskia at gcc dot gnu.org
2021-12-09 7:18 ` pinskia at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-17 8:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Seems to be fixed on the trunk.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98614] Copy ctor/assign cannot be defaulted in specialization by concept
2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
2021-08-17 8:53 ` [Bug c++/98614] " pinskia at gcc dot gnu.org
@ 2021-12-09 7:18 ` pinskia at gcc dot gnu.org
2021-12-09 9:33 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-09 7:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-12-09
Ever confirmed|0 |1
Known to work| |12.0
Status|UNCONFIRMED |NEW
Known to fail| |11.1.0
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98614] Copy ctor/assign cannot be defaulted in specialization by concept
2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
2021-08-17 8:53 ` [Bug c++/98614] " pinskia at gcc dot gnu.org
2021-12-09 7:18 ` pinskia at gcc dot gnu.org
@ 2021-12-09 9:33 ` marxin at gcc dot gnu.org
2023-11-16 15:50 ` cvs-commit at gcc dot gnu.org
2023-11-16 15:51 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-12-09 9:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Keywords|needs-bisection |
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed with r12-1403-gc4e50e500da7692a.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98614] Copy ctor/assign cannot be defaulted in specialization by concept
2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
` (2 preceding siblings ...)
2021-12-09 9:33 ` marxin at gcc dot gnu.org
@ 2023-11-16 15:50 ` cvs-commit at gcc dot gnu.org
2023-11-16 15:51 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2023-11-16 15:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:
https://gcc.gnu.org/g:063d987af0e7a8329559fb116337bdb8ab20d8eb
commit r14-5532-g063d987af0e7a8329559fb116337bdb8ab20d8eb
Author: Patrick Palka <ppalka@redhat.com>
Date: Thu Nov 16 10:49:17 2023 -0500
c++: add fixed testcases [PR98614, PR104802]
Both of these PRs are fixed by r12-1403-gc4e50e500da7692a.
PR c++/98614
PR c++/104802
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/nontype-auto22.C: New test.
* g++.dg/cpp2a/concepts-partial-spec14.C: New test.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98614] Copy ctor/assign cannot be defaulted in specialization by concept
2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
` (3 preceding siblings ...)
2023-11-16 15:50 ` cvs-commit at gcc dot gnu.org
@ 2023-11-16 15:51 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2023-11-16 15:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98614
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
CC| |ppalka at gcc dot gnu.org
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed since GCC 12
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-11-16 15:51 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2021-01-10 5:12 [Bug c++/98614] New: Copy ctor/assign cannot be defaulted in specialization by concept iDingDong at outlook dot com
2021-08-17 8:53 ` [Bug c++/98614] " pinskia at gcc dot gnu.org
2021-12-09 7:18 ` pinskia at gcc dot gnu.org
2021-12-09 9:33 ` marxin at gcc dot gnu.org
2023-11-16 15:50 ` cvs-commit at gcc dot gnu.org
2023-11-16 15:51 ` ppalka at gcc dot gnu.org
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