Go Interface Fields

Question

I\'m familiar with the fact that, in Go, interfaces define functionality, rather than data. You put a set of methods into an interface, but you are unable to specify any fi

Answer 1

If I correctly understand you want to populate one struct fields into another one. My opinion not to use interfaces to extend. You can easily do it by the next approach.

package main

import (
    "fmt"
)

type Person struct {
    Name        string
    Age         int
    Citizenship string
}

type Bob struct {
    SSN string
    Person
}

func main() {
    bob := &Bob{}

    bob.Name = "Bob"
    bob.Age = 15
    bob.Citizenship = "US"

    bob.SSN = "BobSecret"

    fmt.Printf("%+v", bob)
}

https://play.golang.org/p/aBJ5fq3uXtt

Note Person in Bob declaration. This will be made the included struct field be available in Bob structure directly with some syntactic sugar.