如何在Golang中的struct中定义多种数据类型？ [重复]

Question

This question already has an answer here:

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I have an HTTP request that I make, where the response is like so:

{
  "results": [
    {
      "gender": "male",
      "name": {
        "title": "mr",
        "first": "carter",
        "last": "roy"
      },
      "location": {
        "street": "8662 pine rd",
        "city": "minto",
        "state": "nova scotia",
        "postcode": "I8Q 4L3",
        "coordinates": {
          "latitude": "-65.0674",
          "longitude": "-174.1034"
        },
        "timezone": {
          "offset": "+8:00",
          "description": "Beijing, Perth, Singapore, Hong Kong"
        }
      },
      "email": "[e-mail]",
      "login": {...},
      "dob": {
        "date": "1972-07-18T03:10:43Z",
        "age": 46
      },
      "registered": {
        "date": "2014-05-14T07:12:34Z",
        "age": 5
      },
      "phone": "174-802-7804",
      "cell": "194-903-4287",
      "id": {
        "name": "",
        "value": null
      },
      "picture": {
        "large": "https://randomuser.me/api/portraits/men/9.jpg",
        "medium": "https://randomuser.me/api/portraits/med/men/9.jpg",
        "thumbnail": "https://randomuser.me/api/portraits/thumb/men/9.jpg"
      },
      "nat": "CA"
    }
  ],
  "info": {...}
}

The response will always change every time you refresh the page.

The problem is, some fields (like postcode), will either be a string, or int, so how can one specify multiple types for a field like "postcode":

type Location struct {
    Street      string      `json:"street"`
    Postcode    string      `json:"postcode"`
    Coordinates Coordinates `json:"coordinates"`
}

Update

This is not a duplicate, because in my case I have two different data types for a field (i.e. string and int for postcode), so how can one specify this in a struct. I highly discourage looping through the raw data just for type checking.

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