The following code can't be compiled by gcc 4.0.2:
class Base {
public:
class Nested {};
};
class Derived:public Base {
public:
class Nested {
public:
void m();
};
class AnotherNested {
friend class Nested; // gcc 4.0.2 takes it as 'Base::Nested'
//friend class Derived::Nested; // this is needed in order to
be compiled by gcc 4.0.2
#line 14
AnotherNested() {}
};
};
void Derived::Nested::m() {
#line 18
Derived::AnotherNested instance;
}
should the first friend decl refer to Base::Nested or Derived::Nested?
The code is refused by gcc 4.0.2:
a.cpp: In member function 'void Derived::Nested::m()':
a.cpp:14: error: 'Derived::AnotherNested::AnotherNested()' is private
a.cpp:18: error: within this context
because gcc 4 takes for granted the friend refers to Base::Nested.
However, e.g. gcc 3.4 takes it as Derived::Nested.
Declaring the friend the second way:
friend class Derived::Nested;
works in gcc 4.0.2, but it uses not-yet-fully-declared class Derived, which
e.g.
can't be compiled by VC 6.0.
--
Summary: friend class nested in derived class problem
Product: gcc
Version: 4.0.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tomas dot sieger at seznam dot cz
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25492
