msgpack_problem_wrong_unmarshal.go

package main

import (
	"github.com/vmihailenco/msgpack/v4"
	"log"
)

type interfaceAlias interface{
	isZInfoMsgInfoContent()
}

type interfaceEmbedded struct {
	InfoContent interfaceAlias
}

type infoMsgAInfo struct {
	aInfo string
}

type infoMsgDInfo struct {
	extra int
	dInfo string
}

func (*infoMsgAInfo) isZInfoMsgInfoContent() {}

func (*infoMsgDInfo) isZInfoMsgInfoContent() {}


func main() {
	message := interfaceEmbedded{}
	message.InfoContent = &infoMsgAInfo{aInfo: "123"}
	log.Println("Before marshalling: ", message.InfoContent)
	b, err := msgpack.Marshal(&message)
	if err != nil {
		log.Fatal(err)
	}
	newMessage := interfaceEmbedded{}
	newMessage.InfoContent = &infoMsgDInfo{dInfo: "456"}
	if err = msgpack.Unmarshal(b, &newMessage); err != nil {
		log.Fatal(err)
	}
	log.Println("After marshalling: ", newMessage.InfoContent)
}