#define BOOST_MPL_LIMIT_LIST_SIZE 30
#include <boost/variant.hpp>

class T01 {};
class T02 {};
class T03 {};
class T04 {};
class T05 {};
class T06 {};
class T07 {};
class T08 {};
class T09 {};
class T10 {};
class T11 {};
class T12 {};
class T13 {};
class T14 {};
class T15 {};
class T16 {};
class T17 {};
class T18 {};
class T19 {};
class T20 {};
class T21 {};

int main() {
    boost::variant<
        T01, T02, T03, T04, T05, T06, T07, T08, T09, T10,
        T11, T12, T13, T14, T15, T16, T17, T18, T19, T20,
        T21
    > v;

    return 0;
}