Using Box instead of platform specific RawSymbol

[wrenger]

Very good article.

However it seems to me a little bit odd using the platform specific RawSymbol in the VTableV0 implementation to get around the lifetime checks.
Maybe a better cross platform approach could be dereferencing the Symbol and storing the function pointer as std::boxed::Box.

struct VTableV0 {
     free_object: Box<FreeObject>,
     get_info: Box<GetInfo>,
     set_info: Box<SetInfo>,
}

// ...

let free_object: Symbol<FreeObject> = library.get(b"free_object\0").unwrap();
let free_object = Box::new(*free_object);

Apart from that i like your article very much, thanks.