reflection2_1.go

func (d *decodeState) unmarshal(v interface{}) (err error) {
  <skip over some setup>
  rv := reflect.ValueOf(v)
  if rv.Kind() != reflect.Ptr || rv.IsNil() {
    return &InvalidUnmarshalError{reflect.TypeOf(v)}
  }
  d.scan.reset()
  // We decode rv not rv.Elem because the Unmarshaler interface
  // test must be applied at the top level of the value.
  d.value(rv)
  return d.savedError
}