* [Bug c++/84849] Ambiguous resolution of braze initializer list to a class with explicit constructors
[not found] <bug-84849-4@http.gcc.gnu.org/bugzilla/>
@ 2021-12-14 5:55 ` pinskia at gcc dot gnu.org
2023-05-31 20:59 ` [Bug c++/84849] [DR1228] " jason at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-14 5:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84849
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=97220
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
PR 97220 looks similar and might be a dup of this bug.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c++/84849] [DR1228] Ambiguous resolution of braze initializer list to a class with explicit constructors
[not found] <bug-84849-4@http.gcc.gnu.org/bugzilla/>
2021-12-14 5:55 ` [Bug c++/84849] Ambiguous resolution of braze initializer list to a class with explicit constructors pinskia at gcc dot gnu.org
@ 2023-05-31 20:59 ` jason at gcc dot gnu.org
2023-06-01 3:00 ` jason at gcc dot gnu.org
2024-04-23 22:29 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2023-05-31 20:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84849
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Ambiguous resolution of |[DR1228] Ambiguous
|braze initializer list to a |resolution of braze
|class with explicit |initializer list to a class
|constructors |with explicit constructors
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=cwg1228
Status|ASSIGNED |SUSPENDED
Assignee|mpolacek at gcc dot gnu.org |unassigned at gcc dot gnu.org
CC| |jason at gcc dot gnu.org
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
I'm not marking this as a dup of PR60027 because of the specific case of
copy/move constructors, which cannot be constrained to avoid this problem. The
patch in PR109247 fixes the first three testcases, which fall into that
category, but not the testcase in #5, which does not.
The testcase in #6 is unrelated; there is no "explicit".
Unassigning from Marek.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c++/84849] [DR1228] Ambiguous resolution of braze initializer list to a class with explicit constructors
[not found] <bug-84849-4@http.gcc.gnu.org/bugzilla/>
2021-12-14 5:55 ` [Bug c++/84849] Ambiguous resolution of braze initializer list to a class with explicit constructors pinskia at gcc dot gnu.org
2023-05-31 20:59 ` [Bug c++/84849] [DR1228] " jason at gcc dot gnu.org
@ 2023-06-01 3:00 ` jason at gcc dot gnu.org
2024-04-23 22:29 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2023-06-01 3:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84849
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to ensadc from comment #7)
> (In reply to Zhihao Yuan from comment #6)
>
> I think this is a different bug. GCC thinks the implicitly-deleted move
> assignment operator `pair<int&>& pair<int&>::operator=(pair<int&>&&)` is a
> candidate for the assignment, which causes ambiguity with
> `operator=(value_type&&)` (where value_type = pair<int>). But as part of
> resolution of CWG 1402, [class.copy.assign] specifies that "A defaulted move
> assignment operator that is defined as deleted is ignored by overload
> resolution".
Incidentally, no: GCC mentions it, but considers it worse than any other
candidate. The real ambiguity is with
operator=(const pair<int&>&), the implicitly-deleted *copy* assignment. I
don't think this is a bug; if you disagree, please open another PR for it.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c++/84849] [DR1228] Ambiguous resolution of braze initializer list to a class with explicit constructors
[not found] <bug-84849-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2023-06-01 3:00 ` jason at gcc dot gnu.org
@ 2024-04-23 22:29 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2024-04-23 22:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84849
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
DR1228 was closed as NAD.
^ permalink raw reply [flat|nested] 4+ messages in thread