Including outside structs

[seekerkoruth]

I would like to include an external struct to be accessed by the script as well as an external function. How may I do that?

package main

type realstruct struct {
  A int
  B int
  C []float64
}


const src = `package foo
func Bar(s string) string { return s + "-Foo" }
func Baz() float64 { return   rs.A}
func Bax(i int ) float64 { return   rs.C[i]}

`

func main() {

        var rs := realstruct{ A:1 , B: 2, C: make([]float64,5)}  // I want to get rs into the eval env how can I do this?
	i := interp.New(interp.Options{})
	i.Use(stdlib.Symbols)
	i.Eval(src)
	i.Use(stdlib.Symbols)
	i.Eval(src)
}

func externFunc(int i){
   return i
}