On Wed, Nov 23, 2016 at 3:49 PM, Tong Sun wrote:
>
> On Wed, Nov 23, 2016 at 12:09 PM, Nick Patavalis wrote:
>
>> For this specific example, something like this:
>> https://play.golang.org/p/FsorWRaLKk
>>
>
> Thanks a lot Nick!
>
> I've simplified it a bit. Now it is:
>
> func (d Dog) Output() {
> // Presumably complicated stuff, not re-implemented
> d.Animal.Output(d.IsA())
> }
>
> I'm wondering if it is possible to somehow pass d.Speak as a function
> pointer to Animal.Output, so that inside Animal.Output, calling it will get
> to the correct dog.Speak or cat.Speak? Here is the code to start from:
>
> https://play.golang.org/p/cCmum-YRX9
>
> Thanks
>
I think I finally found the easiest way to make virtual function works,
based on Nick Patavalis code and Tahir Hashmi's idea:
func (a Animal) Output(s Speaker) {
// Complicated stuff that must not be re-implemented
fmt.Print("I am a ", s.IsA(),
". My name is ", a.Name,
", aged ", a.Age,
", it is ", a.IsMale,
" I am male.\n ")
s.Speak()
}
https://github.com/suntong/lang/blob/master/lang/Go/src/oo/Polymorphism-AnimalVF2.go
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