如何在boost MSM中传递附加参数int state entry或exit函数

#include <boost/msm/back/state_machine.hpp>
#include <boost/msm/front/euml/euml.hpp>

namespace msm = boost::msm;
namespace mpl = boost::mpl;
using namespace boost::msm::front::euml;

// 定义状态机的状态
BOOST_MSM_EUML_STATE((), State1)
BOOST_MSM_EUML_STATE((), State2)

// 定义状态机的事件
BOOST_MSM_EUML_EVENT(Event1)

// 定义状态机的附加参数
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(int, state_entry_param)

// 定义状态机
BOOST_MSM_EUML_STATE_MACHINE((
    // 定义初始状态
    init_ << State1,

    // 定义状态转换
    transition_table(
        // 从State1触发Event1转换到State2
        Row<State1, Event1, State2>
    ),

    // 定义状态的entry和exit函数
    configure_ << (
        State1 + on_entry<_> / (std::cout << "State1 entry with param: " << _state_entry_param << std::endl),
        State1 + on_exit<_> / (std::cout << "State1 exit" << std::endl),
        State2 + on_entry<_> / (std::cout << "State2 entry" << std::endl),
        State2 + on_exit<_> / (std::cout << "State2 exit" << std::endl)
    )
))

int main()
{
    // 创建状态机对象
    msm::back::state_machine<StateMachine_> stateMachine;

    // 设置附加参数的值
    stateMachine.set_attribute(state_entry_param, 42);

    // 触发状态转换
    stateMachine.process_event(Event1());

    return 0;
}