CODEWITHSUNDEEP
go
Tushar Das
Tushar Das

Reputation: 59

How to check if a struct contains unexported fields in Golang?

Example:

I have a struct,

 type Person struct {
        Name string
        DOB string
        age int
    }

func detectUnexportedInStruct(i interface{}) bool {
         // if `i` contains unexported fields return true
         // else return false
    }
    
func main() {
    fmt.Println(detectUnexportedInStruct(Person{Name: "", DOB: ""}))
}

I would want true to be printed because Person contains an unexported field age.

How can I build my detectUnexportedInStruct() ?

Upvotes: 1

Views: 289

Answers (1)

mkopriva
mkopriva

Reputation: 38303

Use the reflect package:

func detectUnexportedInStruct(i interface{}) bool {
    rt := reflect.TypeOf(i)
    for i := 0; i < rt.NumField(); i++ {
        if !rt.Field(i).IsExported() {
            return true
        }
    }
    return false
}

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

Upvotes: 4

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