Re: Anonymous namespaces and friend functions
On Apr 1, 8:04 pm, bjeremy <bjer...@sbcglobal.net> wrote:
On Apr 1, 9:32 am, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
Ronald Raygun wrote:
I have the class declared like this in the header fiel:
//header
class MyClass
{
public:
MyClass();
MyClass(const MyClass&);
MyClass& operator=(const MyClass&);
~MyClass();
friend int MyFriendFunc(const MyClass&);
private:
int m_i ;
};
//source
namespace
{
void MyFriendFunc(const MyClass& mc){ return mc.m_i++ ;}
}
//MyClass impl ...
I get compiltion errors (MyFriendFunc cannot access private member =
of
MyClass ...
using the ns resolution operator does not seem to work either:
friend int ::MyFriendFunc(const MyClass&);
Try declaring the 'MyFriendFunc' _before_ the class and defining
it after.
V
--
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Also, shouldn't the MyFriendFunc() in the unamed namespace return an
'int' not 'void'...
Even after incorporating both the above comments and disallowing
changing int member in the friend func (works on a reference to
const), Comeau rejects to compile:
class MyClass;
namespace{
int MyFriendFunc(const MyClass&);
}
//header
class MyClass
{
public:
MyClass();
MyClass(const MyClass&);
MyClass& operator=(const MyClass&);
~MyClass();
friend int MyFriendFunc(const MyClass&);
private:
int m_i ;
};
//source
namespace
{
int MyFriendFunc(const MyClass& mc){ return mc.m_i ;}
}
Comeau gives:
"ComeauTest.c", line 20: error: member "MyClass::m_i" (declared at
line 15) is
inaccessible
int MyFriendFunc(const MyClass& mc){ return mc.m_i ;}
^
"ComeauTest.c", line 20: warning: function "<unnamed>::MyFriendFunc"
was declared
but never referenced
int MyFriendFunc(const MyClass& mc){ return mc.m_i ;}
^
Why so?