int foo(int x) int abba = 5 abba + 5 end -- -- -- s(:expressions, s(:function, :int, s(:name, :foo), s(:parameters, s(:parameter, :int, :x)), s(:expressions, s(:field_def, :int, :abba, s(:int, 5)), s(:operator, "+", s(:name, :abba), s(:int, 5)))))