https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64216
Bug ID: 64216
Summary: Function template can access private sub class without
being friend
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: yyc1992 at gmail dot com
The following code compiles on g++ 4.9.2 while it shouldn't.
Accessing private members and access in non-templates are properly checked.
However, a function template can actually access any private sub-class without
being a friend. This problem exist for all standards I've tried
((gnu|c)++(98|03|11|14))
The code is properly rejected by clang++ 3.5.0.
```
//
class C {
struct T2 {
};
static void f() {}
};
template<typename T>
static inline void
f(T)
{
// C::f(); // This generates an error correctly
C::T2 __attribute__((unused)) v2; // This does not generate an error
}
int
main()
{
// C::T2 v2; // This also generates an error correctly
f(1);
return 0;
}
```
