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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/99599] [11 Regression] Concepts requirement falsely reporting cyclic dependency, breaks tag_invoke pattern
Date: Thu, 01 Apr 2021 22:04:08 +0000 [thread overview]
Message-ID: <bug-99599-4-HA0vvpZKCs@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-99599-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99599
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |SUSPENDED
Last reconfirmed| |2021-04-01
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to the_gamester28 from comment #0)
> It seems that the template requirements of invoke_tag(bar_tag, int) are
> considered while evaluating line marked "here". Requirements of irrelevant
> overloads should not be considered, as it can potentially lead to falsely
> reporting a cyclic dependency.
This is as specified by http://wg21.link/cwg2369
I think it would be reasonable to allow a compiler to accept the testcase under
a generalization of 13.9.1/9: "If the function selected by overload resolution
(12.4) can be determined without instantiating a class template definition, it
is unspecified whether that instantiation actually takes place."
But that does not require a compiler to accept it.
It might make sense to check non-dependent conversions that don't require
template instantiation, then constraints, then non-dependent conversions that
do require template instantiation. But that's a matter for the committee; G++
is conforming to the current working paper.
next prev parent reply other threads:[~2021-04-01 22:04 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 13:24 [Bug c++/99599] New: Concepts requirement falsely reporting recursion, " the_gamester28 at msn dot com
2021-03-15 13:49 ` [Bug c++/99599] [11 Regression] Concepts requirement falsely reporting cyclic dependency, " rguenth at gcc dot gnu.org
2021-03-15 14:20 ` redi at gcc dot gnu.org
2021-04-01 22:04 ` jason at gcc dot gnu.org [this message]
2021-04-02 12:47 ` gcc-bugs at marehr dot dialup.fu-berlin.de
2021-04-05 19:49 ` the_gamester28 at msn dot com
2021-04-27 11:40 ` [Bug c++/99599] [11/12 " jakub at gcc dot gnu.org
2021-05-01 17:38 ` ppalka at gcc dot gnu.org
2021-07-28 7:06 ` rguenth at gcc dot gnu.org
2021-08-25 14:44 ` ppalka at gcc dot gnu.org
2022-04-21 7:48 ` rguenth at gcc dot gnu.org
2022-08-08 15:06 ` [Bug c++/99599] [11/12/13 " ppalka at gcc dot gnu.org
2022-10-27 12:42 ` ppalka at gcc dot gnu.org
2023-04-04 5:33 ` catsith at me dot com
2023-05-29 10:04 ` [Bug c++/99599] [11/12/13/14 " jakub at gcc dot gnu.org
2023-06-07 18:25 ` danakj at orodu dot net
2023-06-07 18:41 ` danakj at orodu dot net
2023-06-07 20:03 ` danakj at orodu dot net
2023-08-01 18:16 ` ppalka at gcc dot gnu.org
2023-09-08 16:03 ` cvs-commit at gcc dot gnu.org
2024-02-02 18:02 ` [Bug c++/99599] [11/12/13 " ppalka at gcc dot gnu.org
2024-03-09 15:37 ` ppalka at gcc dot gnu.org
2024-03-21 21:40 ` redi at gcc dot gnu.org
2024-03-21 21:43 ` redi at gcc dot gnu.org
2024-03-22 14:08 ` ppalka at gcc dot gnu.org
2024-03-22 15:58 ` redi at gcc dot gnu.org
2024-03-27 23:16 ` redi at gcc dot gnu.org
2024-03-27 23:18 ` redi at gcc dot gnu.org
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