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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] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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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