Boost Variant: how to get currently held type?

Question

As I understood all types of boost.variant are parsed into real types (meaning as if boost variant a; a=\"bla-bla\" would after compilation t

Answer 1

boost.variant has a .type() function which can return the typeid of the active type, provided you've enabled RTTI.

You could also define a static visitor to perform actions depending on the type of content of the variant, e.g.

struct SomeVisitor : public boost::static_visitor
{
    double operator()(const func0& f0) const { return f0(1.0); }
    double operator()(const func1& f1) const { return f1(1.0, 1.0); }
    double operator()(int integer) const { return integer; }
};
...
std::cout << boost::apply_visitor(SomeVisitor(), v) << std::endl;