c++ - 一个有2个名字的类？

Question

在阅读代码时，我遇到了一个有 2 个标识符“命名它”的类：

class A_EXP Node
{
//..
};

我无法理解这意味着什么。有人可以帮我吗？

Answer 1

A_EXP is probably a macro, possibly expanding to nothing at all. It may also expand to a __declspec or similar declaration, which modifies how the compiler will emit the class as object code. A common use of this pattern would be:

#define A_EXP __declspec(dllexport)