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* [Bug c++/98717] New: [c++20] variadic concept can't take empty pack
@ 2021-01-18 0:14 ryan_greenblatt at brown dot edu
2021-01-19 1:57 ` [Bug c++/98717] [10/11 Regression] " ppalka at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: ryan_greenblatt at brown dot edu @ 2021-01-18 0:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
Bug ID: 98717
Summary: [c++20] variadic concept can't take empty pack
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryan_greenblatt at brown dot edu
Target Milestone: ---
```
template<typename... T>
concept True = true;
static_assert(True<>);
```
"error: invalid use concept ‘True<>’"
https://godbolt.org/z/ndfjzj
I'm suprised this hasn't been caught already... (assuming there isn't a
duplicate bug report I missed)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10/11 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
@ 2021-01-19 1:57 ` ppalka at gcc dot gnu.org
2021-02-04 16:43 ` jason at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ppalka at gcc dot gnu.org @ 2021-01-19 1:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[c++20] variadic concept |[10/11 Regression] [c++20]
|can't take empty pack |variadic concept can't take
| |empty pack
CC| |ppalka at gcc dot gnu.org
Last reconfirmed| |2021-01-19
Target Milestone|--- |10.3
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Known to fail| |10.2.0, 11.0
Known to work| |9.3.0
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Confirmed. We went from accepting to rejecting this testcase after r276764,
aka the C++20 concepts merge.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10/11 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
2021-01-19 1:57 ` [Bug c++/98717] [10/11 Regression] " ppalka at gcc dot gnu.org
@ 2021-02-04 16:43 ` jason at gcc dot gnu.org
2021-02-04 20:43 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jason at gcc dot gnu.org @ 2021-02-04 16:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10/11 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
2021-01-19 1:57 ` [Bug c++/98717] [10/11 Regression] " ppalka at gcc dot gnu.org
2021-02-04 16:43 ` jason at gcc dot gnu.org
@ 2021-02-04 20:43 ` cvs-commit at gcc dot gnu.org
2021-02-05 1:02 ` [Bug c++/98717] [10 " cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-02-04 20:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:4e7c24d97dd65083a770252ce942f43d408fe11d
commit r11-7106-g4e7c24d97dd65083a770252ce942f43d408fe11d
Author: Jason Merrill <jason@redhat.com>
Date: Thu Feb 4 11:46:45 2021 -0500
c++: Empty args for variadic concept [PR98717]
Nice when fixing a bug is as easy as removing incorrect checks.
gcc/cp/ChangeLog:
PR c++/98717
* constraint.cc (build_concept_check_arguments): Remove assert.
(build_concept_check): Allow empty args.
gcc/testsuite/ChangeLog:
PR c++/98717
* g++.dg/cpp2a/concepts-variadic3.C: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
` (2 preceding siblings ...)
2021-02-04 20:43 ` cvs-commit at gcc dot gnu.org
@ 2021-02-05 1:02 ` cvs-commit at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2022-05-12 21:03 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-02-05 1:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:eb15f761bc741599504d532ef9c1c03a8de71820
commit r10-9348-geb15f761bc741599504d532ef9c1c03a8de71820
Author: Jason Merrill <jason@redhat.com>
Date: Thu Feb 4 11:46:45 2021 -0500
c++: Empty args for variadic concept [PR98717]
Nice when fixing a bug is as easy as removing incorrect checks.
gcc/cp/ChangeLog:
PR c++/98717
* constraint.cc (build_concept_check_arguments): Remove assert.
(build_concept_check): Allow empty args.
gcc/testsuite/ChangeLog:
PR c++/98717
* g++.dg/cpp2a/concepts-variadic3.C: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
` (3 preceding siblings ...)
2021-02-05 1:02 ` [Bug c++/98717] [10 " cvs-commit at gcc dot gnu.org
@ 2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2022-05-12 21:03 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-04-08 12:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.3 |10.4
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10.3 is being released, retargeting bugs to GCC 10.4.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98717] [10 Regression] [c++20] variadic concept can't take empty pack
2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
` (4 preceding siblings ...)
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
@ 2022-05-12 21:03 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jason at gcc dot gnu.org @ 2022-05-12 21:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98717
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
Target Milestone|10.4 |10.3
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed in 10.3.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-05-12 21:03 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2021-01-18 0:14 [Bug c++/98717] New: [c++20] variadic concept can't take empty pack ryan_greenblatt at brown dot edu
2021-01-19 1:57 ` [Bug c++/98717] [10/11 Regression] " ppalka at gcc dot gnu.org
2021-02-04 16:43 ` jason at gcc dot gnu.org
2021-02-04 20:43 ` cvs-commit at gcc dot gnu.org
2021-02-05 1:02 ` [Bug c++/98717] [10 " cvs-commit at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2022-05-12 21:03 ` jason at gcc dot gnu.org
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