我可以遍历 C++ 类的(公共)属性吗?

2022-01-24 00:00:00 iteration attributes c++

我找到了 C Structs 和 C# 类的答案，但对 C++ 却空手而归.在 C 中，你不能.在 C# 中，它是 GetProperties() 方法.

I found the answer for both C Structs and C# classes but came back empty-handed concerning C++. EDIT : In C, you can't. In C# it's the GetProperties() method.

上下文:我有一个具有公共属性的 C++ 类(比如说一个带有 X、Y、Z 的 Point).我想通过 UDP 将这些属性发送到 Java 客户端.我的想法是创建一个具有三个属性的字节(char *)缓冲区(我处理了字节序问题).

The context: I have a C++ class with public attributes (let's say a Point with X, Y, Z). I want to send these attributes via UDP to a Java client. My idea was to create a byte (char *) buffer with the three attributes (i took care of the endianness problems).

prepareForUdp(char * buffer)
 {
   int offset = 0;
   int offsetValue = 4;
   char tempBuffer[16];  

   memcpy( tempBuffer, &X_, sizeof(X_) );
   offset = offset + offsetValue;
   memcpy( tempBuffer + offset, &Y_, sizeof(Y_) );
   offset = offset + offsetValue;
   memcpy( tempBuffer + offset, &Z_, sizeof(Z_) );
   offset = offset + offsetValue;  

   memcpy( buffer, tempBuffer, sizeof(buffer) );
 }

我希望我的界面是进化的，因为该点可能会获得第四、五或第 n 维，并且我希望我的 prepareForUdp() 方法是(相对)通用的.

I want my interface to be evolutive, because the point may get a fourth, a five, or an n-th dimension, and I want my prepareForUdp() method to be (relatively) generic.

我的问题是:如何循环(或迭代)我的属性?

My question is : how do I loop (or iterate) through my attributes ?

推荐答案

C++中没有反射.所以，答案是，你不能:)

There is no reflection in C++. So, the answer is, you can't :)

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