Solved

Operator overloading required

Posted on 2003-11-03
9
243 Views
Last Modified: 2013-11-20
I have a class that I derived from CObject...and the strangest thing is happening. There are no dynamic members...yet the compiler insists that I must overload an operator for any operation I want to do with it. Usually....the compiler defaults to a member-by-member copy constructor...however..this one does not. What is different about this class??

class CUserProfile : public CObject
{
      DECLARE_SERIAL(CUserProfile)

public:
      CUserProfile();
      CUserProfile(CUserProfile* cp);
      virtual ~CUserProfile();
      virtual void Serialize(CArchive& ar);

private:
      //User Profile
      CString m_sFullName;
      CString m_sEMailAddress;
      CString m_sNick;
      CString m_sAltNick;
      CString m_sPassword;
      bool m_bInvisible;
      bool m_bUsePassword;

      //Connection Options
      int m_nRetrys;

      //Display Options
      bool m_bPartJoin;
      bool m_bQuit;
      bool m_bColors;
      bool m_bShowUnknowns;

      //DCC Options
      int m_nPacketSize;
      bool m_bFillFileSpaces;
      bool m_bFastSend;
      bool m_bResume;
      bool m_bWarnAccept;
      CString m_sGetFolder;
      CString m_sSharedFolder;
public:
      bool SetNick(CString n);
      bool SetAlternateNick(CString an);
      void SetRealName(CString rn);
      void SetEmail(CString em);
      void SetPassword(CString p);
      void SetInvisible(bool i);
      void SetRetryCount(int rc);
      void SetShowJoinPart(bool jp);
      void SetShowUnknownMsgs(bool um);
      void SetShowColors(bool sc);
      void SetShowQuits(bool sq);
      void SetPacketSize(int ps);
      void SetFillSpaces(bool fs);
      void SetFastSend(bool fs);
      void SetResumeOnExist(bool roe);
      void SetWarnOnAccept(bool woa);
      void SetGetFolder(CString gf);
      CString GetNick(void);
      CString GetAltNick(void);
      CString GetRealName(void);
      CString GetEmail(void);
      bool GetInvisibleMode(void);
      CString GetPassword(void);
      int GetRetryCount(void);
      bool GetShowJoinPart(void);
      bool GetShowUnknown(void);
      bool GetShowColors(void);
      bool GetShowQuits(void);
      int GetPacketSize(void);
      bool GetFillFileSpaces(void);
      bool GetFastSend(void);
      bool GetResumeOnExist(void);
      bool GetWarnOnAcceptSend(void);
      CString GetSendFolder(void);
      
      //CUserProfile operator=();
      bool GetUsePassword(void);
      void SetUsePassword(bool up);
};


0
Comment
Question by:SGyves
  • 4
  • 3
  • 2
9 Comments
 

Author Comment

by:SGyves
ID: 9675933
For example I can't say obj1 = obj2;
0
 
LVL 86

Accepted Solution

by:
jkr earned 300 total points
ID: 9675967
Your variables are all but POD, so you will need both a copy constructor and assignment operator:

CUserProfile::CUserProfile(const CUserProfile& r) {

    m_sFullName=r.m_sFullName ;
    m_sEMailAddress=r.sEMailAddress;

    // for all your members....
}


CUserProfile& CUserProfile::operator=(const CUserProfile& r) {

    m_sFullName=r.m_sFullName ;
    m_sEMailAddress=r.sEMailAddress;

    // for all your members....

    return *this;
}

And, you'll have to declare them like

    CUserProfile(const CUserProfile& r);
    CUserProfile& operator=(const CUserProfile& r);

in your class.


0
 
LVL 9

Expert Comment

by:Priyesh
ID: 9675989
This is from AFX.h

      // Disable the copy constructor and assignment by default so you will get
      //   compiler errors instead of unexpected behaviour if you pass objects
      //   by value or assign objects.
protected:
      CObject();
private:
      CObject(const CObject& objectSrc);              // no implementation
      void operator=(const CObject& objectSrc);       // no implementation


So this behaviour is by design.. :)

0
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 
LVL 86

Expert Comment

by:jkr
ID: 9676057
>>So this behaviour is by design.. :)

You are right, but it does not say one can't override it :o)
0
 

Author Comment

by:SGyves
ID: 9676110
Ok...just wondering why this object suddenly started making me overload assignment and copy. Thank you for the explanation.  :)
0
 
LVL 86

Expert Comment

by:jkr
ID: 9676142
>>just wondering why this object suddenly started making me overload assignment and cop

It became too complex for the compiler to handle - and, I actually would recommend implementing these *always*, as a matter of "taste" :o)
0
 

Author Comment

by:SGyves
ID: 9676631
Yes...yes...I know...it is proper practice to always overload the copy and assignment. Ahhh...so hard not to be lazy. I agree though.
0
 
LVL 9

Expert Comment

by:Priyesh
ID: 9676635
jkr,
I did not say you cannot override it either! SGyves was wondering why CObject would force him to write an overloaded = operator and tried to answer to the point.
0
 

Author Comment

by:SGyves
ID: 9676845
I understood Priyesh....no worries.
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Need to retreive data from .TFS file exported by DVR 8 198
notReplace  challenge 53 128
withoutTen challenge 14 121
Fibonacci challenge 11 121
Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: Dialogs (1) modal - maintaining the database. Continuing from the ninth article about sudoku.   You might have heard of modal and modeless dialogs.  Here with this Sudoku application will we use one of each type: a modal dialog …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.

770 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