Golang如何实现深拷贝_Go deep copy常规方法

import (
    "bytes"
    "encoding/gob"
)

func DeepCopy(src, dst interface{}) error {
    var buf bytes.Buffer
    enc := gob.NewEncoder(&buf)
    dec := gob.NewDecoder(&buf)
    if err := enc.Encode(src); err != nil {
        return err
    }
    return dec.Decode(dst)
}

import (
    "encoding/json"
)

func DeepCopyJSON(src, dst interface{}) error {
    data, err := json.Marshal(src)
    if err != nil {
        return err
    }
    return json.Unmarshal(data, dst)
}

type User struct {
    Name  string
    Tags  []string
    Info  *UserInfo
}

func (u *User) DeepCopy() *User {
    if u == nil {
        return nil
    }
    copy := &User{
        Name: u.Name,
        Tags: make([]string, len(u.Tags)),
        Info: nil,
    }
    copy.Tags = append(copy.Tags[:0], u.Tags...)
    if u.Info != nil {
        copy.Info = &UserInfo{
            Age:  u.Info.Age,
            City: u.Info.City,
        }
    }
    return copy
}

import "github.com/mohae/deepcopy"

copied := deepcopy.Copy(src).(*MyStruct)