strange struct and typedef definition [duplicate]

Question

I came across this struct declaration and I do not now what is the last pointer doing here?

typedef const struct { //Ommiting the members for stackoverflow!!! } PWMnCurrFdbkParams_t, *pPWMnCurrFdbkParams_t;

So the question is

what is the effect of , here?
what is type of*pPWMnCurrFdbkParams_t
what usecase there is to it?

Have a look at: https://stackoverflow.com/questions/1543713/c-typedef-of-pointer-to-structure Hope this helps. — RoT
– RoT, Commented Jul 28, 2018 at 14:42

cdarke · Accepted Answer · 2018-07-28 14:43:04Z

This is quite common, for example Microsoft use it a lot in their header files.

There are two types (comma separated) defined here, PWMnCurrFdbkParams_t is of type const struct and pPWMnCurrFdbkParams_t is a pointer to that const struct.

The * is not part of the name, just as int *x is where x is a pointer to an int.

Use case is almost any collection of structures, like a linked list or tree.

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