How to embed an anonymous struct (struct literal) in another struct in Go?

In Go, embedding an anonymous struct (struct literal) is similar to embedding named structs. Here's an example of how to do it:

package main

import "fmt"

type Person struct {
    name string
    age  int
    // Embedding an anonymous struct
    contact struct {
        email   string
        address string
    }
}

func main() {
    p := Person{
        name: "John Doe",
        age:  30,
        contact: struct {
            email   string
            address string
        }{
            email:   "[email protected]",
            address: "123 Main St",
        },
    }

    fmt.Println(p.name)
    fmt.Println(p.contact.email)
    fmt.Println(p.contact.address)
}

In the above example, the Person struct embeds an anonymous struct using the contact field. The anonymous struct has two fields: email and address.

While initializing a Person struct, we also initialize the anonymous struct using its field names and values.

Note that anonymous structs are useful when you want to embed a small, unrelated struct directly into another struct without the need to define it separately.