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Assignment(=) operator is a special operator that will be provided by the constructor to the class when programmer has not provided(overloaded) as member of the class.(like copy constructor).
When programmer is overloading = operator using friend function, two = operations will exists:
1) compiler is providing = operator
2) programmer is providing(overloading) = operator by friend function.
Then simply ambiguity will be created and compiler will gives error. Its compilation error.
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Ezra
Lao
Blakeobj1 = obj2;
Operator "=" can be overloaded either by the member function or by the friend operator function.
In case of the friend function, the obj1 and obj2 are should be from the different classes. If they are from the same class, the compilation error will occur. We can't use the "this" pointer in the friend function since it is not the member function of the class.
So,
If both objects are from the same class it is better to for operator function (operator=) as member function.
If the objects are from the different class, then the operator function as friend function is advisable.
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