Golang embedded struct type

Ayman_77222 0
Viewed 34384

I have these types:

type Value interface{}

type NamedValue struct {
    Name  string
    Value Value
}

type ErrorValue struct {
    NamedValue
    Error error
}

I can use v := NamedValue{Name: "fine", Value: 33}, but I am not able to use e := ErrorValue{Name: "alpha", Value: 123, Error: err}

Seems that embedding syntax was ok, but using it doesn't work?

composite-literals go embedding struct
3 Answers

For deeply nested structs, the accepted answer's syntax is a little verbose. For example, this :

package main

import (
    "fmt"
)

type Alternative struct {
    Question
    AlternativeName string
}

type Question struct {
    Questionnaire
    QuestionName  string
}

type Questionnaire struct {
    QuestionnaireName string
}

func main() {
    a := Alternative{
        Question: Question{
            Questionnaire: Questionnaire{
                QuestionnaireName: "q",
            },
        },
    }
    fmt.Printf("%v", a)
}

(Go playground)

Could be rewritten like this: 

a := Alternative{}
a.QuestionnaireName = "q"
user_17971610

In addition to the wonderful answer by icza.

you can simply do this:

v := NamedValue{Name: "fine", Value: 33}
e := ErrorValue{NamedValue:v, Error: err}

and it works just fine. checkout the example Here

user_53476700
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