Implementing debug for my class

[ofmrew]

I have written a 3D point class because all Qt classes use float and not qreal. I need double. I would like to have the coordinates written to QDebug(); however, I keep getting compile errors.

error: ‘QDebug MyPoint3D::operator<<(QDebug, const MyPoint3D&)’ must take exactly one argument
     QDebug operator<< (QDebug debug, const MyPoint3D &mc);
                                                         ^
QDebug operator<< (QDebug debug, const MyPoint3D &mc);

QDebug <<(QDebug debug, const MyPoint3D &mc)
{
    QDebugStateSaver saver(debug);
    debug.nospace() << mc.x << mc.y << mc.z;
    return debug;
}

What am I doing wrong?

[mrjj]

hi
Did you add the overload inside the class ?
The error suggest that.

Normally its goes

class X {
..
};

QDebug operator<< (QDebug debug, const X &mc);

and then implementation in . cpp

[aha_1980]

@ofmrew You need to declare the function outside your class MyPoint3D.

Edit: exactly as @mrjj says.

[ofmrew]

@aha_1980 & mrjj Yes, I remember that from serialization. Now it the implementation that gives the error, namely:

 error: expected unqualified-id before ‘<<’ token
 QDebug <<(QDebug debug, const MyPoint3D &mc)
        ^

What is the problem?

[aha_1980]

@ofmrew You are missing "operator". Just do it like @mrjj said in post 2.

[ofmrew]

@aha_1980 Thanks to both of you for your help. I had that, but was distracted by the first problem.

[aha_1980]

@ofmrew So please mark the topic as SOLVED. Thanks!

[mrjj]

Hi
Just as a final note.
If you need to write out private variables, you need
class MyPoint3D {
friend QDebug operator<< (QDebug d, const MyPoint3D &mc);
...
}