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* [Bug c++/102660] New: Valid template default parameter of a friend function is rejected
@ 2021-10-09 9:11 fchelnokov at gmail dot com
2021-10-09 9:19 ` [Bug c++/102660] " pinskia at gcc dot gnu.org
2024-03-26 4:17 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: fchelnokov at gmail dot com @ 2021-10-09 9:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102660
Bug ID: 102660
Summary: Valid template default parameter of a friend function
is rejected
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 is a presumably valid program:
```
struct A{
template<int R>
friend void show();
private:
int c;
};
template<int R = decltype(A{}.c){0} >
void show(){
}
int main(){
show<>();
}
```
It is accepted by Clang, MSVC, but rejected in GCC, which complains about
default parameter of R (asking for forward declaration of the function). Demo:
https://gcc.godbolt.org/z/q1r1a9Ycn
Related discussion: https://stackoverflow.com/q/69341936/7325599
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug c++/102660] Valid template default parameter of a friend function is rejected 2021-10-09 9:11 [Bug c++/102660] New: Valid template default parameter of a friend function is rejected fchelnokov at gmail dot com @ 2021-10-09 9:19 ` pinskia at gcc dot gnu.org 2024-03-26 4:17 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-10-09 9:19 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102660 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |rejects-valid --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- It might be a dup of bug 70608. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/102660] Valid template default parameter of a friend function is rejected 2021-10-09 9:11 [Bug c++/102660] New: Valid template default parameter of a friend function is rejected fchelnokov at gmail dot com 2021-10-09 9:19 ` [Bug c++/102660] " pinskia at gcc dot gnu.org @ 2024-03-26 4:17 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-03-26 4:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102660 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2024-03-26 See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=85604 Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed, the opposite issue is recorded in PR 85604 in that default arguments should not be valid in friend template. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-03-26 4:17 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-10-09 9:11 [Bug c++/102660] New: Valid template default parameter of a friend function is rejected fchelnokov at gmail dot com 2021-10-09 9:19 ` [Bug c++/102660] " pinskia at gcc dot gnu.org 2024-03-26 4:17 ` pinskia at gcc dot gnu.org
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