func txFetchArrayElement(st *State) {
defer st.Advance()
array := reflect.ValueOf(st.StackPop())
switch array.Kind() {
case reflect.Array, reflect.Slice:
default:
st.Warnf("cannot index into non-array/slice element")
return
}
idx := st.StackPop()
v := array.Index(int(idx.(int64)))
st.sa = v.Interface()
}
func txForStart(st *State) {
array := reflect.ValueOf(st.sa)
switch array.Kind() {
case reflect.Array, reflect.Slice:
// Normal case. nothing to do
default:
// Oh you silly goose. You didn't give me a array.
// Use a dummy array
array = reflect.ValueOf([]struct{}{})
}
cf := st.CurrentFrame()
cf.SetLvar(0, nil) // item
cf.SetLvar(1, NewLoopVar(-1, array))
st.Advance()
}