GoLang中的二传手

Question

Sorry for the basic question. I am new to GoLang.

I have a custom type named ProtectedCustomType and I don't want the variables within that to be set directly by the caller, rather want a Getter / Setter methods to do that

Below is my ProtectedCustomType

package custom

type ProtectedCustomType struct {
    name string
    age int
    phoneNumber int
}

func SetAge (pct *ProtectedCustomType, age int)  {
    pct.age=age
} 

And here is my main function

import (
    "fmt"
    "./custom"
)
var print =fmt.Println

func structCheck2() {
    pct := ProtectedCustomType{}
    custom.SetAge(pct,23)

    print (pct.Name)
}

func main() {
    //structCheck()
    structCheck2()
}

But i couldn't proceed further .. can you please help me on how to achieve getter-setter concept in GoLang ?

Answer 1

If you want to have setter you should use method declaration:

func(pct *ProtectedCustomType) SetAge (age int)  {
    pct.age = age
}

and then you will be able to use:

pct.SetAge(23)

This kind of declarations enables you to execute function on your structure, by using

(pct *ProtectedCustomType)

Your are passing pointer to your struct so operations on it changes its internal representation.

You can read more about this kind of function under this link, or under official documentation.