Question

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Operator overloading

The member access operator -> can be overloaded to return a pointer to a data member, or some other variable.

Where is this feature used ?
What coding problems does it solve or alternately, what does it make easier ?

Answer 1

The member access operator is a somewhat odd creature: It is meant to return a pointer or a class with a member access operator overloaded. Once it reaches a pointer it just accesses the corresponding member. The primary use of overloading the member access operator are smart pointers, e.g., std::shared_ptr<T> and std::unique_ptr<T>. Without this operator you’d need to use something like

sp.get()->member

or

(*sp).member

instead of

sp->member