Solved

Derive from CString, but access CString buffer (VS2005)

Posted on 2007-04-09
4
1,314 Views
Last Modified: 2013-12-14
Hi,

I'm copying code from a VC++ 6.0 project to VS 2005. The code has a string class derived from CString in which some members of CString are accessed (m_pchData, GetData()). The code compiles in VC6 but not in VS2005. I need to be able to do:

class CStringEx : CString
{
public NewFunctionEx()
{
   // Access private members of base CString
   char* inside_buffer = m_pchData;
   // OR
   char* inside_buffer = GetData();
}
};

It's just the syntax is tricky since it's a template class and I guess the members are private now...?
0
Comment
Question by:alexatsearidge
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 11

Expert Comment

by:DeepuAbrahamK
ID: 18878397
What is the error which you are getting while compiling it in vs2005?
0
 
LVL 9

Accepted Solution

by:
Priyesh earned 500 total points
ID: 18880330
I think these changes happened in the mfc release with VS2003.
m_pchData is changed to m_pszData and made private. GetData is private. You will have to use GetBuffer to get to the buffer.
0
 

Author Comment

by:alexatsearidge
ID: 18882087
Yeah, when I used GetBuffer() I would get

C2663: 'ATL::CSimpleStringT<BaseType,t_bMFCDLL>::GetBuffer': 2 overloads have no legal conversion for 'this' pointer

But today I found I could get over it with ((CString*)this)->GetBuffer().

We'll see if it works, but before I can compile, I need to solve one more error. The code I'm using calls a method AllocCopy() that evidently allocates a string and copies a substring from an existing string to it. There is no definition for this method anywhere in the project, so I'm wondering if AllocCopy was ever a CString method?
0
 
LVL 9

Expert Comment

by:Priyesh
ID: 18882633
It seems it was a protected member function in CString
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Displaying an arrayList in a listView using the default adapter is rarely the best solution. To get full control of your display data, and to be able to refresh it after editing, requires the use of a custom adapter.
A short article about problems I had with the new location API and permissions in Marshmallow
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question