Go conversion between struct and byte array

Question

I am writing a client - server application in Go. I want to perform C-like type casting in Go.

E.g. in Go

type packet struct {
    opcode uint16
             


        

Answer 1

I've had the same problem and I solved it by using the "encoding/binary" package. Here's an example:

package main

import (
  "bytes"
  "fmt"
  "encoding/binary"
)

func main() {
  p := fmt.Println
  b := []byte{43, 1, 0}

  myStruct := MyStruct{}
  err := binary.Read(bytes.NewBuffer(b[:]), binary.BigEndian, &myStruct)

  if err != nil {
    panic(err)
  }

  p(myStruct)
}

type MyStruct struct {
  Num uint8
  Num2 uint16
}

Here's the running example: https://play.golang.org/p/Q3LjaAWDMh