How do I embed structs and understand field promotion in Go?

In Go, embedding structs allows you to compose types by including one struct within another, promoting the fields and methods of the embedded struct to the enclosing struct. This feature is useful for code reuse, organization, and logical grouping of related behaviors.

Field promotion means that you can access the fields of the embedded struct as if they were fields of the enclosing struct, thereby simplifying the interface of the enclosing struct.

Example of Struct Embedding


        type Address struct {
            City    string
            Country string
        }

        type Person struct {
            Name    string
            Age     int
            Address // Embedding Address struct
        }

        func main() {
            p := Person{
                Name: "John Doe",
                Age:  30,
                Address: Address{
                    City:    "New York",
                    Country: "USA",
                },
            }

            // Accessing fields using embedded struct
            fmt.Println("Name:", p.Name)
            fmt.Println("Age:", p.Age)
            fmt.Println("City:", p.City)     // Promoted field
            fmt.Println("Country:", p.Country) // Promoted field
        }

How do I embed structs and understand field promotion in Go?

Example of Struct Embedding

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How do I embed structs and understand field promotion in Go?

Example of Struct Embedding

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