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* [Bug c++/101356] New: The non-public member of a local class cannot be accessed by a friend of the class
@ 2021-07-07 2:39 xmh970252187 at gmail dot com
2021-08-02 15:35 ` [Bug c++/101356] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: xmh970252187 at gmail dot com @ 2021-07-07 2:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101356
Bug ID: 101356
Summary: The non-public member of a local class cannot be
accessed by a friend of the class
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: xmh970252187 at gmail dot com
Target Milestone: ---
````
auto fun(){
void show();
struct C{
friend void show();
private:
int c;
};
return C{};
}
void show(){
auto o = fun();
o.c = 0;
}
````
Clang accepts this example while GCC rejects it by reporting an error
diagnosis.
As per [class.friend#1]
> A friend of a class is a function or class that is given permission to name the >private and protected members of the class. A class specifies its friends, if >any, by way of friend declarations. Such declarations give special access rights >to the friends, but they do not make the nominated friends members of the >befriending class.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/101356] The non-public member of a local class cannot be accessed by a friend of the class
2021-07-07 2:39 [Bug c++/101356] New: The non-public member of a local class cannot be accessed by a friend of the class xmh970252187 at gmail dot com
@ 2021-08-02 15:35 ` pinskia at gcc dot gnu.org
2021-12-13 15:58 ` pinskia at gcc dot gnu.org
2023-08-23 18:14 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-02 15:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101356
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-08-02
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=20357
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Most likely related to PR 20357 too.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/101356] The non-public member of a local class cannot be accessed by a friend of the class
2021-07-07 2:39 [Bug c++/101356] New: The non-public member of a local class cannot be accessed by a friend of the class xmh970252187 at gmail dot com
2021-08-02 15:35 ` [Bug c++/101356] " pinskia at gcc dot gnu.org
@ 2021-12-13 15:58 ` pinskia at gcc dot gnu.org
2023-08-23 18:14 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-13 15:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101356
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2021-08-02 00:00:00 |2021-12-13
Blocks| |65608
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
When we do friend void ::show(); we get the following warning:
<source>: In function 'auto fun()':
<source>:5:21: warning: 'void show()' has not been declared within '::'
5 | friend void ::show();
| ^~
<source>:3:10: note: only here as a 'friend'
3 | void show();
| ^~~~
And even this is rejected:
namespace A {
void show();
}
auto fun(){
struct C{
friend void A::show();
private:
int c;
};
return C{};
}
void A::show(){
auto o = fun();
o.c = 0;
}
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65608
[Bug 65608] [meta-bug] friend issues
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/101356] The non-public member of a local class cannot be accessed by a friend of the class
2021-07-07 2:39 [Bug c++/101356] New: The non-public member of a local class cannot be accessed by a friend of the class xmh970252187 at gmail dot com
2021-08-02 15:35 ` [Bug c++/101356] " pinskia at gcc dot gnu.org
2021-12-13 15:58 ` pinskia at gcc dot gnu.org
@ 2023-08-23 18:14 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-23 18:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101356
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> And even this is rejected:
This was fixed in GCC 10.5.0, 11.4.0, 12.3.0 and 13+. But the original example
is still broken.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-08-23 18:14 UTC | newest]
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2021-07-07 2:39 [Bug c++/101356] New: The non-public member of a local class cannot be accessed by a friend of the class xmh970252187 at gmail dot com
2021-08-02 15:35 ` [Bug c++/101356] " pinskia at gcc dot gnu.org
2021-12-13 15:58 ` pinskia at gcc dot gnu.org
2023-08-23 18:14 ` pinskia at gcc dot gnu.org
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