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* [Bug c++/106493] New: trailing requires clauses is not used for partial ordering when the ellipsis parameter is present
@ 2022-08-01 0:59 tabloid.adroit at gmail dot com
2022-08-01 2:23 ` [Bug c++/106493] " pinskia at gcc dot gnu.org
2022-08-01 4:49 ` tabloid.adroit at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: tabloid.adroit at gmail dot com @ 2022-08-01 0:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106493
Bug ID: 106493
Summary: trailing requires clauses is not used for partial
ordering when the ellipsis parameter is present
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tabloid.adroit at gmail dot com
Target Milestone: ---
test case:
```
template<typename T>
concept AtLeast2 = sizeof(T) >= 2;
template<typename T>
constexpr int doo(int a, ...) requires AtLeast2<int> && true {
return 1;
}
template<typename T>
constexpr int doo(int b) requires AtLeast2<int> {
return 2;
}
static_assert(doo<int>(2) == 1);
```
The assertion fails due to ambiguity. However, I'd expect the trailing requires
clauses kicks in by https://eel.is/c++draft/temp.fct#temp.func.order-6.4
Removing the ellipsis parameter fixes the assertion failure.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/106493] trailing requires clauses is not used for partial ordering when the ellipsis parameter is present
2022-08-01 0:59 [Bug c++/106493] New: trailing requires clauses is not used for partial ordering when the ellipsis parameter is present tabloid.adroit at gmail dot com
@ 2022-08-01 2:23 ` pinskia at gcc dot gnu.org
2022-08-01 4:49 ` tabloid.adroit at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-08-01 2:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106493
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang rejects this for the same reason ...
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/106493] trailing requires clauses is not used for partial ordering when the ellipsis parameter is present
2022-08-01 0:59 [Bug c++/106493] New: trailing requires clauses is not used for partial ordering when the ellipsis parameter is present tabloid.adroit at gmail dot com
2022-08-01 2:23 ` [Bug c++/106493] " pinskia at gcc dot gnu.org
@ 2022-08-01 4:49 ` tabloid.adroit at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: tabloid.adroit at gmail dot com @ 2022-08-01 4:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106493
--- Comment #2 from Yuanfang Chen <tabloid.adroit at gmail dot com> ---
I'm actually fixing it on the Clang side. It would be great to make GCC/Clang
match each other.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-08-01 4:49 UTC | newest]
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2022-08-01 0:59 [Bug c++/106493] New: trailing requires clauses is not used for partial ordering when the ellipsis parameter is present tabloid.adroit at gmail dot com
2022-08-01 2:23 ` [Bug c++/106493] " pinskia at gcc dot gnu.org
2022-08-01 4:49 ` tabloid.adroit at gmail dot com
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