如何定义函数声明宏

Question

I have the following problem: I need to define a macro that has to be used instead of using regular C expression.

For example I want this:

THREAD(FIRST) 

... to be substituted by this

void THREAD_FIRST(void) 

... in the code.

I tried with this:

#define THREAD(x)    void THREAD_#x(void)

... but it didn't work. Maybe the space after void is not permitted. Any ideas how to solve it?

Answer 1

您使用了错误的预处理程序运算符，要使用##而不是#进行令牌粘贴

#define THREAD(x)    void THREAD_##x (void)