Answer by Jonathan Leffler for Is it a good idea to typedef pointers?

The only time I use a pointer inside the typedef is when dealing with pointers to functions:

typedef void (*SigCatcher(int, void (*)(int)))(int);

typedef void (*SigCatcher)(int);SigCatcher old = signal(SIGINT, SIG_IGN);

Otherwise, I find them more confusing than helpful.

 typedef SigCatcher (*SignalFunction)(int, SigCatcher);

Or, to declare the signal() function:

 extern SigCatcher signal(int, SigCatcher);

That is, a SignalFunction is a pointer to a function which takes two arguments (an int and a SigCatcher) and returns a SigCatcher. And signal() itself is a function which takes two arguments (an int and a SigCatcher) and returns a SigCatcher.