Trouble writing recursive CVEX function

[JLyddon]

I have experience writing code in VEX and want to start writing some recursive functions. I've been searching thoroughly online, and found through this website that:

 

The functions are in-lined automatically by the compiler, so recursion will not work. To write a recursive algorithm, you should use shader calls instead.

 

 

So I have started looking into shader calls here and can see the Fibonacci sequence example. I am struggling to understand where to put this code for it to work. I've made a CVEX shader builder and put the code in here, but I get the error that "Invalid return type (cvex) for function fib."

 

Any help or insight into what I might be doing wrong would be greatly appreciated. Would it be easier/faster/less effort to just do it in HDK?

Thanks in advance

printFib.hipnc

[Shinjipierre]

Well, here's a way to compute the fibonacci sequence without recursion, just made it in a SOP wrangle as it's easier to check.

 

printFib.hipnc

[JLyddon]

Remi, thank you for your quick reply. I'm afraid the fibonacci sequence is merely an example of what I would like to achieve through recursion as a demonstration any further insight you have into solving this kind of problem would be greatly appreciated.