Data Template

A Data Template is a data structure similar to a class. It is entirely based on the NBT data structure, but unlike ordinary NBT, a Data Template defines the structure of the NBT. In other words, it specifies which members exist in the NBT, allowing the compiler to check member access during compilation.

Definition

Use the data keyword to define a Data Template. For example:

# Definition
data Test{
    int a;  # An integer
    nbt b;  # Any NBT value
}

func main(){
    # Create an object
    Test t = Test();
    t.a = 5;
    t.b = {
        "key": "value"
    };

    # Or directly assign values
    Test t2 = {
        "a": 5,
        "b": {
            "key": "value"
        }
    };
}

Members of a Data Template can be accessed using the . operator.

print(t.a);
print(t.b);

Like a class, you can also define methods within a Data Template.

data Test{
    int a;
    nbt b;

    func print(){
        print(this.a);
        print(this.b);
    }
}