使用 Boost 状态图，如何无条件转换到状态？

#include<boost/statechart/state_machine.hpp>
#include<boost/statechart/simple_state.hpp>
#include<boost/statechart/transition.hpp>
#include<boost/statechart/event.hpp>

struct MyEvent : boost::statechart::event<MyEvent> {};

struct State1 : boost::statechart::simple_state<State1, StateMachine> {};
struct State2 : boost::statechart::simple_state<State2, StateMachine> {};

struct StateMachine : boost::statechart::state_machine<StateMachine, State1> {};

struct TransitionToState2 : boost::statechart::transition<TransitionToState2, State1, State2> {
    TransitionToState2() {
        set_trigger(MyEvent());
    }
};

int main() {
    StateMachine sm;
    sm.initiate();
    sm.process_event(MyEvent());
    return 0;
}