The question is, how to parse JSON which contains a defined set of types, but allowing multiple types in an array.

Classes.cs

class Animal {
    protected Animal(string type)
    {
        Type = type;
    }

    public string Type { get; private set; }
}

class Dog : Animal
{
    public Dog(string name) : base("Dog")
    {
        Name = name;
    }

    public string Name { get; private set; }
}

class Cat : Animal
{
    public Cat(string name) : bsae("Cat")
    {
        Name = name;
    }

    public string Name { get; private set; }
}

class JsonObject
{
    public Animal[] Animals { get; set; }
}

Data.json

{
    "animals": [
        {
            "type": "Dog",
            "name": "Buster"
        },
        {
            "type": "Cat",
            "name": "Lucy"
        }
    ]
}

Example.go

type Animal struct {
    Type string `json:"type"`
}

type Cat struct {
    Animal
    Name string `json:"name"`
}

type Dog struct {
    Animal
    Name string `json:"name"`
}

type JsonObject struct {
    Animals []??? // Which type should I use? Doesn't compile with "Animal"
}