Struct embedding

Context

Go supports composition via struct embedding (similar to mixins). An embedded struct’s fields and methods are promoted to the outer struct.

Example

Embed a Person struct inside an Employee.

Code example

package main

import "fmt"

type Person struct {
    Name string
    Age  int
}

type Employee struct {
    Person     // embedded
    ID         int
    Department string
}

func main() {
    e := Employee{
        Person:     Person{Name: "Alice", Age: 30},
        ID:         123,
        Department: "Engineering",
    }

    // Access promoted fields directly
    fmt.Println(e.Name, e.Age, e.ID, e.Department)
}

Output

Alice 30 123 Engineering

Useful links

• Go spec: Struct types (embedding)
• Go by Example: Embedding