member initialization - no matching function - candidates are

[Jeff]

Its been years since I did C++ and Im unsure what this is about.

I have a QT class Im inheriting from in my .h file:

class Mosfet : Q3CanvasRectangle
{
public:
Mosfet::Mosfet(const QRect &qr, Q3Canvas *canvas);
Mosfet::~Mosfet();

....etc
};

In my .cpp file I have:

Mosfet::Mosfet(const QRect &qr, Q3Canvas *canvas) :
Q3CanvasRectangle(canvas)
{
}


When I compile I get:
Mosfet.cpp: In constructor 'Mosfet::Mosfet(const QRect&,
Q3Canvas*)':
Mosfet.cpp:13: error: no matching function for call to
'Q3CanvasRectangle::Q3CanvasRectangle()'
/opt/qt41/include/Qt/q3canvas.h:565: note: candidates are:
Q3CanvasRectangle::Q3CanvasRectangle(int, int, int, int, Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:564: note:
Q3CanvasRectangle::Q3CanvasRectangle(const QRect&, Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:563: note:
Q3CanvasRectangle::Q3CanvasRectangle(Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:561: note:
Q3CanvasRectangle::Q3CanvasRectangle(const Q3CanvasRectangle&)

My question is, why does the compiler say that there is no matching
function:
Mosfet.cpp:13: error: no matching function for call to
'Q3CanvasRectangle::Q3CanvasRectangle()'

when my initializer list is clearly Q3CanvasRectangle(canvas) ?

It appears to me it doesnt like my init list and is calling a default
ctor,
which of course isnt in the candidates list.

Can someone point out the err in my ways?
Thanks,
Jeff

PS using fedora core 4, gcc version 4.0.2 20051125 (Red Hat 4.0.2-8)
QT 4.1

 

[Victor Bazarov]

Its been years since I did C++ and Im unsure what this is about.

I have a QT class Im inheriting from in my .h file:

class Mosfet : Q3CanvasRectangle

Privately inherited? Just checking...

{
public:
Mosfet::Mosfet(const QRect &qr, Q3Canvas *canvas);
Mosfet::~Mosfet();

...etc
};

In my .cpp file I have:

Mosfet::Mosfet(const QRect &qr, Q3Canvas *canvas) :
Q3CanvasRectangle(canvas)
{
}


When I compile I get:
Mosfet.cpp: In constructor 'Mosfet::Mosfet(const QRect&,
Q3Canvas*)':
Mosfet.cpp:13: error: no matching function for call to
'Q3CanvasRectangle::Q3CanvasRectangle()'

Which line is '13'?

/opt/qt41/include/Qt/q3canvas.h:565: note: candidates are:
Q3CanvasRectangle::Q3CanvasRectangle(int, int, int, int, Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:564: note:
Q3CanvasRectangle::Q3CanvasRectangle(const QRect&, Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:563: note:
Q3CanvasRectangle::Q3CanvasRectangle(Q3Canvas*)
/opt/qt41/include/Qt/q3canvas.h:561: note:
Q3CanvasRectangle::Q3CanvasRectangle(const Q3CanvasRectangle&)

My question is, why does the compiler say that there is no matching
function:
Mosfet.cpp:13: error: no matching function for call to
'Q3CanvasRectangle::Q3CanvasRectangle()'

when my initializer list is clearly Q3CanvasRectangle(canvas) ?

Are you sure it's the part of the initialiser list that your compiler is
complaining about?

It appears to me it doesnt like my init list and is calling a default
ctor,
which of course isnt in the candidates list.

Could it be that you also have a member of that type? Read FAQ 5.8.

Can someone point out the err in my ways?

As soon as you supply enough information.

Thanks,
Jeff

PS using fedora core 4, gcc version 4.0.2 20051125 (Red Hat 4.0.2-8)
QT 4.1

That's irrelevant.

V

 

[Ian Collins]

Its been years since I did C++ and Im unsure what this is about.

when my initializer list is clearly Q3CanvasRectangle(canvas) ?

Does Q3CanvasRectangle have such a constructor?

 

[Jeff]

Does Q3CanvasRectangle have such a constructor?

yes.

I just found the problem. I had a leftover Q3CanvasRectangle
in my private area. UGH

Thanks guys