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If I’ve overloaded operator+ and operator= do I still need to overload
operator+= for something like this to work:
MyClass mc1, mc2;
mc1 += mc2;
operator+= is not a composite of + and =, therefore you do need to overload it explicitly, since compiler do not know to build puzzles for you. but still you do able to benefit from already defined/overloaded operators, by using them inside operator+=.