I have a Character interface defined like:
type Character interface {
SomeFunction()
}
And a Player struct defined like:
type Player struct{}
func (r *Player) SomeFunction() { }
// Some fields and other functions....
Suppose I have a function defined as
func TakeInterface(characterValue Character) {
// Do something
}
The catch is, I want to pass in characterValue as a Player by address so that changes made to it will be made to the Player the caller passed in. In Java and C++, this is easy, but I can't seem to figure it out in Golang. I've tried something like,
func TakeInterface(characterValue &Character) {
// Do something that changes characterValue
}
and then passing in a Player pointer, but then I get the error *Character.Character is pointer to interface, not interface when I try to pass in an address.
How do I go about passing a Player by address to a function that takes a Character/Character pointer? I've been looking around but with no success. Thanks!
Have you tested your code? I'm guessing no, because it works the way you expect it to work. Just pass a pointer to a player when calling the function.
func main() {
p := new(Player)
TakeInterface(p)
}
Or
func main() {
p := Player{0}
TakeInterface(&p)
}
In go you can use a type or a pointer to a type as an argument to a function that takes an interface because both satisfy the interface. You can do both:
var p1 Player
p1.SomeFunction()
var p2 *Player
p2.SomeFunction()
You should do the tour of go: https://tour.golang.org/methods/10
Here is the whole code: https://play.golang.org/p/iQIChLCziG