Annoying CArray problem!

[Vaderman]

I have a forward declaration in my header file - class CLogItemData and have the following also :

typedef CArray<CLogItemData*,CLogItemData*> logDetails;

this is declared outside my class

 logDetails* m_logDetails;

this is declared as a private member of my class.

Now in my implementation file I have the following :

void CDialogReportPrintLog::LogDetails(logDetails& aryItemDataArray)
{
	m_logDetails = &aryItemDataArray;
}

and in OnIntDialog I have the following :

	CString strIDSFormat;
	int nSize = m_logDetails->GetSize();

	// Determine what time of fields are available to the user to filter
	for (int nLoop = 0; nLoop < nSize; nLoop++)
	{
		CLogItemData* log = (CLogItemData*)m_logDetails->GetAt(nLoop);

		if ((!m_bDateTime) && (log->m_lDateTime != 0))
		{
			strIDSFormat.FormatMessage(IDS_STRINGDATETIME);
			m_bDateTime = !m_bDateTime;
		}
		m_comboSortFirstOrder.AddString(strIDSFormat);
	}

when I do the following and examine the contents of log

CLogItemData* log = (CLogItemData*)m_logDetails->GetAt(nLoop);

its fine - I see all the data I need. However, if I do the following as well:

if ((!m_bDateTime) && (log->m_lDateTime != 0))
{
....
}

I get a really annoying error - error C2027: use of undefined type 'CLogItemData'
... see declaration of 'CLogItemData'
C:\dev\ivs2\source\DialogReportPrintLog.cpp(58) : error C2065: 'm_lDateTime' : undeclared identifier

1. How can it say that CLogItemData is undefined when I can GetAt() an element and also look at the contents of log?
2. and how can 'm_lDateTime' be undeclared when I can visiblely see it in the log object (which is defined as CLogItemData).

it does not like me doing log->m_lDateTime!!!

Can anyone see waht it is I'm missing here?

regards

John

[Philip Nicoletti]

do you include the header for CLogItemData in the
implementation file ? (DialogReportPrintLog.cpp)

[Vaderman]

No. If I do, I'll get circular compilation problems.

I've included my Dialog header file in a file that has two classes - one where I instantiate my dialog, and the other class is CLogItemData. Sounds like I should put CLogItemData into a file of its own as so to deal with this problem. good idea??

Regards

John

[Amit Sebiz]

if i understand by but you ment by saying "circular compilation problems"
Check followingFAQ

[Vaderman]

Originally I used forward declarations... but thats where the problems started arising... please refer to my original posting for further details.

I've ended up putting the offending class into a file of its own and included in the header file thats common to both classes and its worked.

Regards

John