gistfile1.txt

package main

import "fmt"
import "reflect"

type Cloneable interface {
  Clone() Cloneable;
}

type Mapable interface {
  MapableDummy();
}

type MapA map[int]string;
type MapB map[string]int;

func (m MapA) MapableDummy() {;}
func (m MapB) MapableDummy() {;}

func (m Mapable) Clone() Cloneable {
  omap := reflect.MakeMap(reflect.Typeof(m).(*reflect.MapType));
  nmap := reflect.NewValue(reflect.Typeof(m).(*reflect.MapType));
  keys := omap.Keys();
  for k := range(keys) {
    nmap.SetElem(k, omap.Elem(k));
  }
  return nmap.(Cloneable);
}

func main() {
  m1 := make(MapA);
  m1[1] = "foo";
  //var m2 MapB;

  c := m1.Clone();
  fmt.Println(c);
}