What are the differences between these two typedef styles in C?

Question

I\'m curious what the difference here is when typedefing an enum or struct. Is there any difference semantically between these two blocks?

This:

typ         


        

Answer 1

For structs there's a real difference that isn't simply about naming.

This is valid C:

struct SomeEnum { struct SomeEnum *first; };

This is not:

typedef struct { SomeEnum *first; } SomeEnum;