In Go, it is possible to embed structs within other structs:

type person struct {
    first string
    last string
    age   int
}

type employee struct {
    person
    employee_id int
    salary      int
}

We can instantiate the employee type as follows:

e := employee{
    person: person{
        first: "Ali",
        last:  "Yeşil",
        age:   33,
    },
    employee_id: 001,
    salary:      4500,
}

We can then access the fields of the embedded struct as if they were fields of the outer struct:

// e.first is a shorthand for e.person.first
fmt.Println(e.first) 

One can also use anonymous structs without explicitly defining a type:

z := struct {
    a string
    b int
}{
    a: "aaa",
    b: 123,
}

If these won’t be reused elsewhere, using anonymous structs can keep the code clean.