VC6.0 compiler error C2664 while using GUID
-
I am in over my head again. I am getting error C2664 and I did read the Tech note ( something about ANSI improvement) about it and frankly I just do not understand what is the problem and how to fix it in VC6.0. Do I have to redefine the GUID_DEVCLASS_COMPUTER? The parameter GUID is defined in both functions as “const GUID*” The API fails with this error C2664 and C_GetClassImgIndex compiles OK error C2664: 'SetupDiGetClassImageIndex' : cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *' Conversion loses qualifiers Fails b = SetupDiGetClassImageIndex(&m_imgList, &GUID_DEVCLASS_COMPUTER, &nRootImg); OK int n = C_GetClassImgIndex(&GUID_DEVCLASS_COMPUTER); Any help would be greatly appreciated. Cheers Vaclav
-
I am in over my head again. I am getting error C2664 and I did read the Tech note ( something about ANSI improvement) about it and frankly I just do not understand what is the problem and how to fix it in VC6.0. Do I have to redefine the GUID_DEVCLASS_COMPUTER? The parameter GUID is defined in both functions as “const GUID*” The API fails with this error C2664 and C_GetClassImgIndex compiles OK error C2664: 'SetupDiGetClassImageIndex' : cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *' Conversion loses qualifiers Fails b = SetupDiGetClassImageIndex(&m_imgList, &GUID_DEVCLASS_COMPUTER, &nRootImg); OK int n = C_GetClassImgIndex(&GUID_DEVCLASS_COMPUTER); Any help would be greatly appreciated. Cheers Vaclav
Vaclav_Sal wrote:
The API fails with this error C2664
You are not using the API, this is a compiler error.
Vaclav_Sal wrote:
cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *'
You are passing a
constparameter to a function that does not expect one. Useconst_cast[^] to remove it. But be sure you understand the potential consequences.One of these days I'm going to think of a really clever signature.
-
Vaclav_Sal wrote:
The API fails with this error C2664
You are not using the API, this is a compiler error.
Vaclav_Sal wrote:
cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *'
You are passing a
constparameter to a function that does not expect one. Useconst_cast[^] to remove it. But be sure you understand the potential consequences.One of these days I'm going to think of a really clever signature.
Richard , I do not follow your explanation. In this MSDN doc the second parameter is defined as const GUID*. Am I using wrong version ot the Setupapi.h? PS Did you read the title? I did say compiler error.I do appreciate your help, but growing little tired of your sideline remarks,that's all. http://msdn.microsoft.com/en-us/library/windows/hardware/ff551074(v=vs.85).aspx BOOL SetupDiGetClassImageIndex( _In_ PSP_CLASSIMAGELIST_DATA ClassImageListData, _In_ const GUID *ClassGuid, _Out_ PINT ImageIndex );
-
Richard , I do not follow your explanation. In this MSDN doc the second parameter is defined as const GUID*. Am I using wrong version ot the Setupapi.h? PS Did you read the title? I did say compiler error.I do appreciate your help, but growing little tired of your sideline remarks,that's all. http://msdn.microsoft.com/en-us/library/windows/hardware/ff551074(v=vs.85).aspx BOOL SetupDiGetClassImageIndex( _In_ PSP_CLASSIMAGELIST_DATA ClassImageListData, _In_ const GUID *ClassGuid, _Out_ PINT ImageIndex );
-
I am in over my head again. I am getting error C2664 and I did read the Tech note ( something about ANSI improvement) about it and frankly I just do not understand what is the problem and how to fix it in VC6.0. Do I have to redefine the GUID_DEVCLASS_COMPUTER? The parameter GUID is defined in both functions as “const GUID*” The API fails with this error C2664 and C_GetClassImgIndex compiles OK error C2664: 'SetupDiGetClassImageIndex' : cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *' Conversion loses qualifiers Fails b = SetupDiGetClassImageIndex(&m_imgList, &GUID_DEVCLASS_COMPUTER, &nRootImg); OK int n = C_GetClassImgIndex(&GUID_DEVCLASS_COMPUTER); Any help would be greatly appreciated. Cheers Vaclav
Oh come on man, it is the C language. If the compiler bitches just cast it out. YOU are in control. YO are the master! :)
-
I am in over my head again. I am getting error C2664 and I did read the Tech note ( something about ANSI improvement) about it and frankly I just do not understand what is the problem and how to fix it in VC6.0. Do I have to redefine the GUID_DEVCLASS_COMPUTER? The parameter GUID is defined in both functions as “const GUID*” The API fails with this error C2664 and C_GetClassImgIndex compiles OK error C2664: 'SetupDiGetClassImageIndex' : cannot convert parameter 2 from 'const struct _GUID *' to 'struct _GUID *' Conversion loses qualifiers Fails b = SetupDiGetClassImageIndex(&m_imgList, &GUID_DEVCLASS_COMPUTER, &nRootImg); OK int n = C_GetClassImgIndex(&GUID_DEVCLASS_COMPUTER); Any help would be greatly appreciated. Cheers Vaclav
Have you tried something like this: GUID tmp(GUID_DEVCLASS_COMPUTER); b = SetupDiGetClassImageIndex(&m_imgList, &tmp, &nRootImg);