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.
