C++反射类和成员函数的实现

原文地址：http://blog.wangziliang.com/2012/12/28/c%E5%8F%8D%E5%B0%84%E5%87%BD%E6%95%B0%E5%92%8C%E7%B1%BB%E7%9A%84%E5%AE%9E%E7%8E%B0/

C++反射类和成员函数的实现，需要用到STL标准模板库

//定义反射工厂类以及基类NSObject
#ifndef __NS_OBJECT_FACTORYE_H__
#define __NS_OBJECT_FACTORYE_H__
 
#include 

//===============================================

//示例封装成员函数反射方法定义一个base类
#define __EJ_GET_POINTER_TO(NAME) \
    SEL _ptr_to_##NAME() { \
        return (SEL)NAME; \
    } \
    REFECTION_FUNCTION_IMPLEMENT(_ptr_to_##NAME);
 
#define EJ_BIND_FUNCTION_DEFINE(NAME, ARGC_NAME, ARGV_NAME) \
    int _func_##NAME(size_t ARGC_NAME, const char* ARGV_NAME)
 
#define EJ_BIND_FUNCTION(CLASS, NAME, ARGC_NAME, ARGV_NAME) \
    \
    static int _##CLASS##_func_##NAME( \
        Base* object, \
        size_t argc, \
        const char argv[] \
    ) { \
        CLASS* instance = (CLASS*)object; \
        int ret = instance->_func_##NAME(argc, argv); \
        return ret; \
    } \
    __EJ_GET_POINTER_TO(_##CLASS##_func_##NAME)\
    \
    /* The actual implementation for this method */ \
    int CLASS::_func_##NAME(size_t ARGC_NAME, const char* ARGV_NAME)
 
class Base: public NSObject {
public:
    Base();
    ~Base();
    REFECTION_CLASS_IMPLEMENT_DEFINE(Base);//反射类申明
 
    EJ_BIND_FUNCTION(EJBindingEjectaCore,include, argc, argv )//反射成员函数申明
};
 
REFECTION_CLASS_IMPLEMENT(Base);//反射类实现
 
//反射成员函数类申明
EJ_BIND_FUNCTION(EJBindingEjectaCore,include, argc, argv ) {
    if( argc < 1 ) { return -1; }
    return 1;
}

//===========================================

//使用方法
typedef int (*CALL_BACK)( Base* object,  size_t argc,  const char argv[] );
 
int main(){
  
    NSObject* object = NSClassFromString("Base");//获得反射对象
    SEL callback = NSSelectorFromString("_ptr_to__Base_func_include");//获得函数指针
    ((CALL_BACK)callback)((Base*)object, 0, NULL);//调用静态函数使其调用object对象的成员函数
    return 0;
  
}