I am using boost::any to store pointers and was wondering if there was a way to extract a polymorphic data type. Here is a simple example of what ideally I'd like to do, but currently doesn't work. struct A {}; struct B : A {}; int main() { boost::any a; a = new B(); boost::any_cast< A* >(a); } This fails because a is ...
Hello, I'm having trouble choosing between Boost.Any and Boost.Variant. When should I use each one? What are the advantages and disadvantages of each? I am basically looking to store some states from external sources. Thanks, Omer ...
Hello, I am using boost::any to have polymorphic types, I need to be able to cast an object to its base type. class A { public: int x; virtual int foo()= 0; }; class B : public A { public: int foo() { return x + 1; } }; int main() { B* bb = new B(); boost::any any = bb; bb->x = 44; A...
I'm trying to remove a class object from list<boost::any> l l.remove(class_type); I tried writing something like this as a member function bool operator == (const class_type &a) const //not sure about the arguments { //return bool value } How would you write an overload function to remove an object of class from a std::list of b...
Hello! As far as I understand, there is no serialization (boost::serialization, actually) support for boost::any placeholder. Does someone know if there is a way to serialize a custom boost::any entity? The problem here is obvious: boost::any uses template-based placeholders to store objects and typeid to check if boost::any_cast is a...