Go: Struct Embedding vs Inheritance

What are the main differences between struct embedding and inheritance in Go?

Struct embedding allows you to include one struct within another, promoting composition, while inheritance is not directly supported in Go.

Can you give me an example of struct embedding in Go?

Sure! Here's a simple example:

type Person struct {
    Name string
    Age  int
}

type Employee struct {
    Person  // Embedding Person struct
    ID      int
}

In this case, Employee has all fields of Person.

How does method promotion work with struct embedding?

Method promotion allows you to call methods of the embedded struct directly on the outer struct. For example, if Person has a method Greet(), you can call employee.Greet() directly.

Is there a performance difference between using struct embedding and inheritance?

Struct embedding generally has better performance since it avoids the overhead of method lookups associated with inheritance in other languages.