C++函数指针数组 多态回调实现方案

// 定义函数指针类型
typedef void (*CallbackFunc)(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee);
// 函数指针数组
CallbackFunc callbackArray[3];
// 回调函数实现
void handlerA(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) { / 处理逻辑 A / }
void handlerB(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) { / 处理逻辑 B / }
void handlerC(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) { / 处理逻辑 C / }
// 注册函数
callbackArray[0] = handlerA;
callbackArray[1] = handlerB;
callbackArray[2] = handlerC;
// 调用
callbackArray0; // 触发 handlerA

class Handler {
public:
    static void wrapperA(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) {
        getInstance().onEventA(https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee);
    }
    static void wrapperB(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) {
        getInstance().onEventB(https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee);
    }
private:
void onEventA(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) { / 实际逻辑 / }
void onEventB(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) { / 实际逻辑 / }
static Handler& getInstance() {
static Handler h;
return h;
}
};
// 注册静态包装函数
CallbackFunc polyCallbacks[2] = { Handler::wrapperA, Handler::wrapperB };

enum EventType {
    EVENT_CLICK,
    EVENT_MOVE,
    EVENT_KEY,
    EVENT_COUNT
};
void onClick(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee)   { / 点击处理 / }
void onMove(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee)    { / 移动处理 / }
void onKey(int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee)     { / 键盘处理 / }
CallbackFunc eventCallbacks[EVENT_COUNT] = {
onClick,
onMove,
onKey
};
// 分发函数
void dispatchEvent(EventType type, int https://www.php.cn/link/80bd1978a3dff0dbaceb95fb9191e7ee) {
if (type < EVENT_COUNT && eventCallbacks[type]) {
eventCallbackstype;
}
}

#include 
#include 
using Callback = std::function;
std::array polyArray = {
[](int d) { / Lambda A / },
[](int d) { / Lambda B / },
Handler::wrapperA
};
// 调用
polyArray0;