gocopy

NewFrom is a deep copy func by reflect, and wihtout third-party dependencies. Supported types as flow:

• signed/unsigned int
• float
• string
• bool
• map
• slice / array
• ptr
• complex
• struct
• interface
• chan
• func
• unsafePointer

Note: The func NewFrom returns itself when input is a chan or func or unsafePointer.

Update is a update tool by reflect, assign value from src to dst when src and dst has same field name and data type

Install

go get github.com/CaiJinKen/gocopy

Example

NewFrom:

package main

import (
  "fmt"
  
  "github.com/CaiJinKen/gocopy"
)

type Config struct {
	Id    uint32
	Name  string
	Used  bool
	Pets  []*Dog
	PetMp map[string]*Dog
}

type Dog struct {
	Name string
	Age  uint8
}

func main() {
	conf := Config{
		Id:    10,
		Name:  "tiger",
		Used:  true,
		Pets:  []*Dog{{Name: "k1", Age: 1}, {Name: "k2", Age: 2}},
		PetMp: map[string]*Dog{"v1": {Name: "v1", Age: 3}, "v2": {Name: "v2", Age: 4}},
	}

	data := gocopy.NewFrom(conf) // data=>main.Config
	data = gocopy.NewFrom(&conf) // data=>&main.Config
	// data will intact when conf changed
	
	// handle data
	fmt.Printf("data %v\n",data)
}

Update:

package main

import (
  "fmt"
  
  "github.com/CaiJinKen/gocopy"
)

type Config struct {
	Id    uint32
	Name  string
	Used  bool
	Pets  []*Dog
	PetMp map[string]*Dog
}

type Dog struct {
	Name string
	Age  uint8
}

func main() {
	conf := Config{
		Id:    10,
		Name:  "tiger",
		Used:  true,
		Pets:  []*Dog{{Name: "k1", Age: 1}, {Name: "k2", Age: 2}},
		PetMp: map[string]*Dog{"v1": {Name: "v1", Age: 3}, "v2": {Name: "v2", Age: 4}},
	}
  
  data := &Config

	err := gocopy.Update(conf, data)
	err = gocopy.Update(&conf, data)
	// dst change when conf reference data changed
	
	// handle data
	fmt.Printf("data %v\n",data)
}