package main


import (
	"fmt"
	"reflect"
)


func main() {
	a := func(){fmt.Println("aaa")}
	a()

	v := reflect.ValueOf(&a)
	b := func(){fmt.Println("bbb")}
	vb := reflect.ValueOf(&b)
	v.Elem().Set(vb.Elem())
	a()
}