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* [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation
@ 2021-03-14 23:21 johelegp at gmail dot com
2021-03-15 17:34 ` [Bug c++/99586] " mpolacek at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: johelegp at gmail dot com @ 2021-03-14 23:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
Bug ID: 99586
Summary: Use of class template identifier checked for CTAD
before instantiation
Product: gcc
Version: 11.0
URL: https://godbolt.org/z/4KWWjT
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: johelegp at gmail dot com
CC: johelegp at gmail dot com
Target Milestone: ---
See https://godbolt.org/z/4KWWjT.
```C++
#include<array>
template<auto>struct A{};
template<auto... V>A a=A<std::array{V...}>{};
```
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/99586] Use of class template identifier checked for CTAD before instantiation
2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
@ 2021-03-15 17:34 ` mpolacek at gcc dot gnu.org
2021-04-01 13:37 ` ppalka at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2021-03-15 17:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
Last reconfirmed| |2021-03-15
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/99586] Use of class template identifier checked for CTAD before instantiation
2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
2021-03-15 17:34 ` [Bug c++/99586] " mpolacek at gcc dot gnu.org
@ 2021-04-01 13:37 ` ppalka at gcc dot gnu.org
2021-04-02 23:57 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2021-04-01 13:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org
Status|NEW |ASSIGNED
CC| |ppalka at gcc dot gnu.org
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/99586] Use of class template identifier checked for CTAD before instantiation
2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
2021-03-15 17:34 ` [Bug c++/99586] " mpolacek at gcc dot gnu.org
2021-04-01 13:37 ` ppalka at gcc dot gnu.org
@ 2021-04-02 23:57 ` cvs-commit at gcc dot gnu.org
2021-04-21 13:29 ` ppalka at gcc dot gnu.org
2021-04-21 23:18 ` johelegp at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-04-02 23:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
--- Comment #2 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:cf25e27faef75e265e659f39ef6b7d0f1695dfeb
commit r11-7962-gcf25e27faef75e265e659f39ef6b7d0f1695dfeb
Author: Patrick Palka <ppalka@redhat.com>
Date: Fri Apr 2 19:47:09 2021 -0400
c++: Refine check for CTAD placeholder [PR99586]
In the below testcase, during finish_compound_literal for A<B{V}>{},
type_uses_auto finds and returns the CTAD placeholder for B{V}, which
tricks us into attempting CTAD on A<B{V}>{} and leads to bogus errors.
AFAICT 'type' will always be a bare 'auto' in the CTAD case so we don't
need to look deeply to find it; checking template_placeholder_p instead
should suffice here.
gcc/cp/ChangeLog:
PR c++/99586
* semantics.c (finish_compound_literal): Check
template_placeholder_p instead of type_uses_auto.
gcc/testsuite/ChangeLog:
PR c++/99586
* g++.dg/cpp2a/nontype-class42.C: New test.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/99586] Use of class template identifier checked for CTAD before instantiation
2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
` (2 preceding siblings ...)
2021-04-02 23:57 ` cvs-commit at gcc dot gnu.org
@ 2021-04-21 13:29 ` ppalka at gcc dot gnu.org
2021-04-21 23:18 ` johelegp at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2021-04-21 13:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
Target Milestone|--- |11.0
--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed for GCC 11.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/99586] Use of class template identifier checked for CTAD before instantiation
2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
` (3 preceding siblings ...)
2021-04-21 13:29 ` ppalka at gcc dot gnu.org
@ 2021-04-21 23:18 ` johelegp at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: johelegp at gmail dot com @ 2021-04-21 23:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99586
--- Comment #4 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
Thank you.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-03-14 23:21 [Bug c++/99586] New: Use of class template identifier checked for CTAD before instantiation johelegp at gmail dot com
2021-03-15 17:34 ` [Bug c++/99586] " mpolacek at gcc dot gnu.org
2021-04-01 13:37 ` ppalka at gcc dot gnu.org
2021-04-02 23:57 ` cvs-commit at gcc dot gnu.org
2021-04-21 13:29 ` ppalka at gcc dot gnu.org
2021-04-21 23:18 ` johelegp at gmail dot com
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