module Foo
  ref ofthen(int n)
    if(0)
      isit = 42
    else
      maybenot = 667
    end
  end
end
-- -- --
s(:list,  [s(:module,  "Foo",  [s(:function,  :ref,
  s(:name,  "ofthen"),
  s(:parameters,
    s(:field,  :int,  :n)),
  s(:expressions,
    s(:if,
      s(:condition,
        s(:int,  0)),
      s(:if_true, 
        s(:assign,
          s(:name,  "isit"),
          s(:int,  42))),
      s(:if_false,  [s(:assign,
  s(:name,  "maybenot"),
  s(:int,  667))]))))])])