operator=

Home
Beginners
MFC
Windows
C++
C#
Internet
ASP.Net
Data
DNN
Networking
Development
Miscellaneous
Archaic

See Memberwise Assignment and Initialization.

One important part is the following syntax for an "operator="override:

type& type :: operator=( [const | volatile] type& )

Which means that for FunctList the "operator=" override needs to be declared something like:

FunctList& operator=(FunctList &pf);

Also be sure to use "this" in "operator=" overrides as shown in examples, unless you are sure it is not necessary. So your "operator=" override needs to have assignment statements in the following format:

this->?=a.?;

where "?" is a member variable that needs to be copied. Finally, the "operator=" override needs to return "*this" as in the following:

return *this;

So the following are samples of "operator=" functions. The first one is very basic:

class CSimple {
	int m_SomeNumber;
	CSimple() {m_SomeNumber=0;}
	virtual ~CSimple(){}
	CSimple &operator=(const CSimple &Parameter) {
		this->m_SomeNumber = Parameter.m_SomeNumber;
		return *this;
		};
};

This other one has a CList collection member:

class CWithList {
	CWithList();
	virtual ~CWithList();
	int m_SomeNumber;
	CString m_Name;
	CList <COperation,COperation&> m_SomeList;
	CWithList &operator=(const CWithList &Parameter) {
		this->m_SomeNumber = Parameter.m_SomeNumber;
		this->m_Name = Parameter.m_Name;
		this->m_SomeList.RemoveAll();
		this->m_SomeList.AddHead(&Parameter.m_SomeList);
		return *this;
		};
};

Note that if you are using the CArray collection instead of CList, you could use "Copy" instead of "AddHead".