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I think it is too convoluted to be fixed :)

Nah, we'll just rewrite the Standard. hmm... or maybe _ is an object of some class type where all the overloaded operators are no-ops.

--_ -= (_-- -= --_) - (_-- - --_) - _; // <-- this is even cooler C++/Morse code

So learn about std::vector, iterators and generic algorithms? :)