How to overload -> operator in C++ [duplicate]

This question already has an answer here:

• Overloading member access operators ->, .* (C++) 7 answers


• How to overload -> operator in C++ Proxy Pattern 1 answer

As per the title, how to overload -> operator in C++?

I can't find any documentation.

cppreference glosses over it.

The Wikipedia page on overloading similarly glosses over it.

Operator overloading <-- this SO post again has a '->' shaped hole in it, although one comment gives a hint:

operator->() is actually extremely weird. It's not required to return a value_type* -- in fact, it can return another class type, provided that class type has an operator->(), which will then be called subsequently. This recursive calling of operator->()s proceeds until a value_type* return type occurs. Madness! :)

It appears that this particular operator is not straightforward to overload.

Could someone link to documentation, or (preferably) provide some here?

PS I recognisze this is an unusual overload, I have need of it in a Proxy pattern, here