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* [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++
@ 2021-10-17 15:17 fchelnokov at gmail dot com
2021-10-17 20:04 ` [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: fchelnokov at gmail dot com @ 2021-10-17 15:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802
Bug ID: 102802
Summary: Selection of inherited operator contrary to `using`
clause in C++
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
This program is invalid:
```
using A = decltype([](int){ return 1; });
using B = decltype([](){ return 2; });
struct S : A, B {
using A::operator();
};
int main() {
S s;
static_assert( s() == 2 ); // erroneously passes in GCC and Clang
}
```
It must be rejected because A::operator(int) takes 1 argument and B::operator()
shall not be considered. Only MSVC correctly rejects it now:
https://gcc.godbolt.org/z/x6x3aWzoq
Related discussion: https://stackoverflow.com/q/69601650/7325599
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type 2021-10-17 15:17 [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++ fchelnokov at gmail dot com @ 2021-10-17 20:04 ` pinskia at gcc dot gnu.org 2021-10-17 20:05 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-10-17 20:04 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2021-10-17 Summary|Selection of inherited |Selection of inherited |operator contrary to |operator contrary to |`using` clause in C++ |`using` clause in C++ when | |using lambda type --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type 2021-10-17 15:17 [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++ fchelnokov at gmail dot com 2021-10-17 20:04 ` [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type pinskia at gcc dot gnu.org @ 2021-10-17 20:05 ` pinskia at gcc dot gnu.org 2021-10-24 3:43 ` rs2740 at gmail dot com 2021-10-24 13:54 ` fchelnokov at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-10-17 20:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- ICC also rejects it. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type 2021-10-17 15:17 [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++ fchelnokov at gmail dot com 2021-10-17 20:04 ` [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type pinskia at gcc dot gnu.org 2021-10-17 20:05 ` pinskia at gcc dot gnu.org @ 2021-10-24 3:43 ` rs2740 at gmail dot com 2021-10-24 13:54 ` fchelnokov at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: rs2740 at gmail dot com @ 2021-10-24 3:43 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802 TC <rs2740 at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rs2740 at gmail dot com --- Comment #3 from TC <rs2740 at gmail dot com> --- No, this is valid. B's operator() is not visible, but its conversion to function pointer is, and that introduces a surrogate call function during the overload resolution for the function call expression (and it's selected because it is the only viable candidate). ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type 2021-10-17 15:17 [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++ fchelnokov at gmail dot com ` (2 preceding siblings ...) 2021-10-24 3:43 ` rs2740 at gmail dot com @ 2021-10-24 13:54 ` fchelnokov at gmail dot com 3 siblings, 0 replies; 5+ messages in thread From: fchelnokov at gmail dot com @ 2021-10-24 13:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802 Fedor Chelnokov <fchelnokov at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |WONTFIX Status|NEW |RESOLVED --- Comment #4 from Fedor Chelnokov <fchelnokov at gmail dot com> --- Thanks for TC's explanation! This is an equivalent code to the question, but without lambdas: gcc.godbolt.org/z/38T35Yfvs GCC is correct in processing the original code, closing the issue. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-10-24 13:54 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-10-17 15:17 [Bug c++/102802] New: Selection of inherited operator contrary to `using` clause in C++ fchelnokov at gmail dot com 2021-10-17 20:04 ` [Bug c++/102802] Selection of inherited operator contrary to `using` clause in C++ when using lambda type pinskia at gcc dot gnu.org 2021-10-17 20:05 ` pinskia at gcc dot gnu.org 2021-10-24 3:43 ` rs2740 at gmail dot com 2021-10-24 13:54 ` fchelnokov at gmail dot com
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