Fumitoshi UKAI <[EMAIL PROTECTED]> writes:
> Hmm, maybe this would be what the upstream auther wants.
It's hard to know what upstream wants given a bug in the compiler and
a bug in the code. I think ns::operator+ would work just as well as
::operator+ due to argument-dependent name lookup ("koenig lookup").
> I tried this and it seems that __GNUC__ >= 4 would be required
> for friend line.
If ns::operator+ is OK then the following should work with gcc-3 and
gcc-4:
namespace ns {
class A;
A operator+(const A& x, const A& y);
};
class ns::A {
public:
A(int j) { i = j; };
private: int i;
friend A ns::operator+(const A& x, const A& y);
};
using namespace ns;
A ns::operator+(const A& x, const A& y) {
return A(x.i + y.i);
}
However if this is code within a library then switching from
::operator+ to ns::operator+ would be an ABI change.
--
Philip Martin
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