Go for-range 的 value值地址每次都一样的原因解析

func main() {
    arr := []int{1, 2, 3}
    for _, v := range arr {
        arr = append(arr, v)
    }
    fmt.Println(arr)
}

func main() {
    arr := []int{1, 2, 3}
    newArr := []*int{}
    for _, v := range arr {
        newArr = append(newArr, &v)
    }
    for _, v := range newArr {
        fmt.Println(*v)
    }
}

// Arrange to do a loop appropriate for the type.  We will produce
//   for INIT ; COND ; POST {
//           ITER_INIT
//           INDEX = INDEX_TEMP
//           VALUE = VALUE_TEMP // If there is a value
//           original statements
//   }

// The loop we generate:
//   len_temp := len(range)
//   range_temp := range
//   for index_temp = 0; index_temp < len_temp; index_temp++ {
//           value_temp = range_temp[index_temp]
//           index = index_temp
//           value = value_temp
//           original body
//   }

//   for_temp := range
//   len_temp := len(for_temp)
//   for index_temp = 0; index_temp < len_temp; index_temp++ {
//           value_temp = for_temp[index_temp]
//           index = index_temp
//           value = value_temp
//           original body
//   }