C Typedef and Struct Question

Question

What\'s the difference between these two declarations, and is one preferred over the other?

typedef struct IOPORT {  
    GPIO_TypeDef* port;  
    u16               


        

Answer 1

the first allows you to use IOPORT inside the struct for refering to objects of the same type. useful in cases such as linked lists where a node has to refer to a node.