module Fibo
  int fibonaccit(int n)
    int a = 0
    return a
  end

  fibonaccit( 10 )
end

-- -- --
s(:expressions, 
  s(:module,  :Fibo, 
    s(:function,  :int, 
      s(:name,  :fibonaccit), 
      s(:parameters, 
        s(:field,  :int,  :n)), 
      s(:expressions, 
        s(:name,  :int), 
        s(:assign, 
          s(:name,  :a), 
          s(:int,  0)), 
        s(:return, 
          s(:name,  :a)))), 
    s(:call, 
      s(:name,  :fibonaccit), 
      s(:arguments, 
        s(:int,  10)))))