Are there any restrictions other than these?

Question

1) The operators :: (scope resolution), . (member access), .* (member access through pointer to member), and ?: (ternary conditional) cannot be overloaded.
2) New operators such as **, <>, or &| cannot be created.
3) The overloads of operators && and || lose short-circuit evaluation.
4) The overload of operator -> must either return a raw pointer or return an object (by reference or by value), for which operator -> is in turn overloaded.

Answer 1

for the valid operators, some of them require either 1 or 2 parameters exactly. along with a specific return value. usually the object or a boolean. other than. that u got em all lol