the-way-to-go_ZH_CN/eBook/examples/chapter_12/gob1.go

// gob1.go
package main

import (
	"bytes"
	"fmt"
	"encoding/gob"
	"log"
)

type P struct {
	X, Y, Z int
	Name    string
}

type Q struct {
	X, Y *int32
	Name string
}

func main() {
	// Initialize the encoder and decoder.  Normally enc and dec would be      
	// bound to network connections and the encoder and decoder would      
	// run in different processes.      
	var network bytes.Buffer   // Stand-in for a network connection      
	enc := gob.NewEncoder(&network) // Will write to network.      
	dec := gob.NewDecoder(&network)	// Will read from network.      
	// Encode (send) the value.      
	err := enc.Encode(P{3, 4, 5, "Pythagoras"})
	if err != nil {
		log.Fatal("encode error:", err)
	}
	// Decode (receive) the value.      
	var q Q
	err = dec.Decode(&q)
	if err != nil {
		log.Fatal("decode error:", err)
	}
	fmt.Printf("%q: {%d,%d}\n", q.Name, *q.X, *q.Y)
}
// Output:   "Pythagoras": {3,4}