package common

import (
	"bytes"
	"encoding/gob"
)

// Warning: If src contains a pointer to a zero-valued object,
// the pointer will be converted to nil.
// such as *string -> nil; *[]string{} -> nil
func CopyByGob(dst, src interface{}) error {
	var buf bytes.Buffer
	if err := gob.NewEncoder(&buf).Encode(src); err != nil {
		return err
	}
	return gob.NewDecoder(bytes.NewBuffer(buf.Bytes())).Decode(dst)
}