"signal"... pfft... entry level kindergarten stuff. Try parsing array of pointers to array of function pointers taking pointer array of arrays with some const and __restrict sprinkled on. And that'd be a warm up. Then name some of the function pointer arguments _const, _restrict and _ - and now we are talking. Spiral out of that!

* This is loosely based on an interview question I got few years ago. I did answer it, then asked similar clusterfuck of a question back. Needless to say it didn't go anywhere.