C++ VC6 to VC.NET - strange error

Hi,

Using my C++ VS6.0 application, I have converten a .dsw workspace file to .sln by opening it with VS.NET 2003 (and also tested with VS.NET 2002).

I cleaned some syntax incompability errors, and now I am left with these 2 errors:

Code:

---

f:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\Guiddef.h(193) : error C2803: 'operator =='
must have at least one formal parameter of class type
f:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\Guiddef.h(198) : error C2803: 'operator !='
must have at least one formal parameter of class type

---

The code at the referred location is like this:

Code:

---

#ifdef __cplusplus
__inline int operator==(REFGUID guidOne, REFGUID guidOther)
{
    return IsEqualGUID(guidOne,guidOther);
}

__inline int operator!=(REFGUID guidOne, REFGUID guidOther)
{
    return !(guidOne == guidOther);
}
#endif

---

I have searched the net, but seams like no-one has had this error before.

Anybody got a suggestion?

Thanks!


BTW: I am using several lib and dll files built with VS6.0, and since the .sln file that I am using is converted from a .dsw-file, my project is umnamaged, I guess.

The error points to Guiddef.h. What exactly is the error corresponding to?

Kuphryn

Hi Kuphryn,

I am not sure what the error corresponds to, this is the entire build output:

Code:

---

------ Rebuild All started: Project: applikasjon, Configuration: Debug Win32 ------

Deleting intermediate files and output files for project 'applikasjon', configuration 'Debug|Win32'.
Compiling...
StdAfx.cpp
mfc_fix.cpp
CVideo.cpp
CartVRML.cpp
CartReference.cpp
CartReach.cpp
CartPose.cpp
CartPointNode.cpp
CartPen.cpp
 WINVER not defined. Defaulting to 0x0501 (Windows XP and Windows .NET Server)
CartPathNode.cpp
CartPathList.cpp
CartMenuTable.cpp
CartMenuPanel.cpp
CartMenuButton.cpp
CartMenu.cpp
CartIMenu.cpp
CartGLDisplay.cpp
CartFont3D.cpp
CartEventNode.cpp
CartDisplay.cpp
CartDetect.cpp
f:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\Guiddef.h(193) : error C2803: 'operator ==' must have at least one formal parameter of class type
f:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\Guiddef.h(198) : error C2803: 'operator !=' must have at least one formal parameter of class type
CartDesign.cpp
CartControl.cpp
CartConfig.cpp
CartCfgMap.cpp
CartCameraPTGREY.cpp
CartCameraIMAQ.cpp
CartCamera.cpp
CartCalMap.cpp
C_matrix.cpp
C_draw.cpp
artMain.cpp

Build log was saved at "file://f:\Projects\applikasjon\Debug\BuildLog.htm"
artVIS - 2 error(s), 0 warning(s)


---------------------- Done ----------------------

    Rebuild All: 0 succeeded, 1 failed, 0 skipped

---

I guess maybe the error " WINVER not defined. Defaulting to 0x0501 (Windows XP and Windows .NET Server)" might have something to do with this? I am running Windows XP, however.

Thanks!

Post the code that uses that particular operator.

I'm sorry, I might be stupid, but is it the "==" operator you are talking about?

I use == and != all over the place. The CartDetect.pp file is a few thousand lines long, and I can't post it because it is my company that owns the file...

Guess you can't help me then....?

Try and find a snippet of code that compares a REFGUID to another REFGUID using the '==' operator. That's all I can think of right now. We'll solve this, don't worry.

Thanks bennyandthejets,

I contacted National Instruments - they deliver a computer vision library (IMAQ) that is used in the application.

Currently it seems that they have developed support for Visual Studio 6.0 only - not .NET...So I guess I'm stuck unless I move to another vision library...

Just to prove me stupid: a REFGUID - that might be a function-call to this library, right?

Thanks again!

Try adding:

Code:

---

#define _NO_SYS_GUID_OPERATOR_EQ_

---

to your project settings. You may not even use the inline GUID == operator. Otherwise tweaking of the header file include order may do the trick. Finally, if all else fails you can replace the inline == operator with IsEqualGUID() directly.

Thanks, anonytmouse!

I tried defining _NO_SYS_GUID_OPERATOR_EQ_, and it compiled!

Then I got an error message about "cannot open msvcirtd.lib". I discovered that this .lib file is placed in "C:\Program Files\Microsoft Visual Studio\VC98\Lib" and "C:\Program Files\Microsoft Visual Studio .NET\Vc7\lib", but NOT in "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib", for some reason.

This means that the .lib file follows with VS 6.0 and VS .NET, but not with VS .NET 2003...does anybody know why not with .NET 2003?

Anyway - my application is compiling, linking and running now! Thank you everybody (especially anonytmous)!

Because .Net 2003 ships with a new version of the library that uses a different name. I think.