nType conversions will not help when operators are members -- because a member is required to have the first operand as an object of the class; if it converted
to some other type, the
member function will not be found
as a possible candidate function and a compile error will result or the wrong operator will be used (such as the built-in operators).
nAlso, when user defined conversions to built-in types have been specified, the predefined operators may end up being used even when we use an operator with a user defined type for which an overloaded operator exists! Overloaded operators are only invoked if at
least one of those operands
is a user defined type.