Is it possible to serialize nested/complex classes with nlohmann/json?

Question

I would like to use nlohmann/json to serialize a tree, but I am unsure if nlohmann/json provides the necessary features.

Features about which I am unsure:

• Serialization of nested types. I am serializing a tree after all...

• Serialization of pointers to abstract types. Figure a class hierarchy. A node has one or more pointers to child nodes. These pointers are of type AbstractClass*. The serializer would need to convert AbstractClass* to a concrete class pointer.

• Serialization of std::variant

• Serialization of "custom strings", e.g. strings which use a polymorphic allocator. My assumption is that this should not be an issue.

• Smart pointers.

A class could look like this:

class some_class {
std::vector<std::shared_ptr<const AbstractClass>> child_nodes;
std::variant<int, double, AbstractClass> some_variant;
// more member variables

public:
   some_class() = delete;
   // non-default constructors here
};

The documentation provides an example for the serialization of a custom data source. Would such an interface be sufficient for my use-case? Does anyone have experience with the above scenario?