In this article we will see how anonymous structs works in golang. Generally in go, structs are declared as

type person struct {
    Name string
    Age int8
    Address string
}
Go

and later a new variable is created of the above struct type like below

person := Person{"Prabesh",29,"Australia"}
Go

but instead of this you can also use anonymous structs, which is a subtle feature of go lang. It makes it easier for you to avoide creating extra struct types.

You can create anonymous structs in go like this


func main() {
    // Creating a new variable using anonymous structs
    person := struct {
        Name string
        Age int8
        Address string
    }{
        Name: "Prabesh",
        Age: 29,
        Address: "Australia",
    }
}
Go

Such implementation of anonymous structs are seen commonly while creating unit tests in go.

Here is a full program with its output

package main

import "fmt"

func main() {
	// Creating a new variable using anonymous structs
	person := struct {
		Name    string
		Age     int8
		Address string
	}{
		Name:    "Prabesh",
		Age:     29,
		Address: "Australia",
	}
	fmt.Printf("%v age is %v and he lives in %v\n", person.Name, person.Age, person.Address)
}
Go

Output:

➜  golearn go run main.go

Prabesh age is 29 and he lives in Australia
Bash