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* [Bug c++/99273] New: List initialization prefers initializer_list a little too strongly
@ 2021-02-25 21:39 rs2740 at gmail dot com
2021-03-03 17:28 ` [Bug c++/99273] " mpolacek at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: rs2740 at gmail dot com @ 2021-02-25 21:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99273
Bug ID: 99273
Summary: List initialization prefers initializer_list a little
too strongly
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rs2740 at gmail dot com
Target Milestone: ---
This is basically bug 64665 but closed back in 2015 - I think incorrectly.
Reduced test case:
#include <initializer_list>
struct S { S(int); };
void f(std::initializer_list<S>);
int f(int);
using T = decltype(f({1}));
using T = int;
GCC rejects (picking the initializer_list<S> overload); Clang accepts.
{1} to initializer_list<S> is a user-defined conversion
(https://eel.is/c++draft/over.ics.list#5); {1} to int is a standard conversion
- in particular, the identity conversion
(https://eel.is/c++draft/over.ics.list#10.1). Since the conversion sequences
are not of the same basic form, https://eel.is/c++draft/over.ics.rank#2
controls and says that the latter is better.
DR 1467 modified what is now https://eel.is/c++draft/over.ics.rank#3.1 to say
that a list initialization sequence that converts to initializer_list is better
than any other list-initialization sequence "even if one of the other rules in
this paragraph would otherwise apply", but paragraph 3 only applies when the
two conversion sequences have the same basic form. In the above example, they
don't.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/99273] List initialization prefers initializer_list a little too strongly
2021-02-25 21:39 [Bug c++/99273] New: List initialization prefers initializer_list a little too strongly rs2740 at gmail dot com
@ 2021-03-03 17:28 ` mpolacek at gcc dot gnu.org
2022-02-04 14:16 ` ppalka at gcc dot gnu.org
2022-02-04 22:28 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2021-03-03 17:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99273
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-03-03
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Um, confirmed, I guess.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/99273] List initialization prefers initializer_list a little too strongly
2021-02-25 21:39 [Bug c++/99273] New: List initialization prefers initializer_list a little too strongly rs2740 at gmail dot com
2021-03-03 17:28 ` [Bug c++/99273] " mpolacek at gcc dot gnu.org
@ 2022-02-04 14:16 ` ppalka at gcc dot gnu.org
2022-02-04 22:28 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: ppalka at gcc dot gnu.org @ 2022-02-04 14:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99273
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fchelnokov at gmail dot com
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
*** Bug 104383 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/99273] List initialization prefers initializer_list a little too strongly
2021-02-25 21:39 [Bug c++/99273] New: List initialization prefers initializer_list a little too strongly rs2740 at gmail dot com
2021-03-03 17:28 ` [Bug c++/99273] " mpolacek at gcc dot gnu.org
2022-02-04 14:16 ` ppalka at gcc dot gnu.org
@ 2022-02-04 22:28 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-02-04 22:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99273
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 83264.
*** This bug has been marked as a duplicate of bug 83264 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-02-04 22:28 UTC | newest]
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2021-02-25 21:39 [Bug c++/99273] New: List initialization prefers initializer_list a little too strongly rs2740 at gmail dot com
2021-03-03 17:28 ` [Bug c++/99273] " mpolacek at gcc dot gnu.org
2022-02-04 14:16 ` ppalka at gcc dot gnu.org
2022-02-04 22:28 ` pinskia at gcc dot gnu.org
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