在C++中用C#风格设置类的属性值

想要实现的效果就是如下这样获取和设置类的属性：

class A
{
private:
	int x;
};

A a;
a.x = 1;
int b = a.x;

借助VC编译器所支持的属性声明即可实现：

__declspec( property (put=setFunction, get=getFunction) ) data-type property-name; 

通过几个宏包装一下：

#define PROPERTY(t,n)  __declspec( property 
	( put = property__set_##n, get = property__get_##n ) ) t n;\
	typedef t property__tmp_type_##n
#define READONLY_PROPERTY(t,n) __declspec( property (get = property__get_##n) ) t n;\
	typedef t property__tmp_type_##n
#define WRITEONLY_PROPERTY(t,n) __declspec( property (put = property__set_##n) ) t n;\
	typedef t property__tmp_type_##n
#define GET(n) property__tmp_type_##n property__get_##n() 
#define SET(n) void property__set_##n(const property__tmp_type_##n& value) 

private: 
	int _x; 
public:  
 	PROPERTY(int, x);
  	GET(x) 
 	{ 
 		return _x; 
	}
 	SET(x)
 	{
 		_x = value;
 	} 

细节请见原文：http://www.codeproject.com/Articles/118921/C-Properties