On Mon, Jan 1, 2018 at 8:13 PM, Tong Sun <suntong...@gmail.com> wrote:
>
> Are just the last two attempts that I make, apart from many other failed
> attempts that I've lost track of, but neither compiles.
Thanks. It helps to know that the problem is that the code does not compile.
I see that this issue was already answered.
>> First, think in Go terms, don't think in terms like "virtual method"
>> that do not exist in Go.
>>
>> What you want is something like
>>
>> type TokenVisitor interface {
>> VisitToken()
>> }
>>
>> Then your WalkBody function will take a TokenVisitor, and your
>> different types will implement different VisitToken methods.
>>
>> (I see that you said WalkBody method, but you probably want a WalkBody
>> function instead.)
>
>
> I did meant WalkBody method. See:
>
> https://github.com/suntong/lang/blob/master/lang/Go/src/xml/htmlParserTokens.go#L54
I understand that you asked for a WalkBody method. I'm trying to say:
Go is not C++ or Java. Go does not have virtual methods. It has
interfaces. The natural way to use an interface is to write a
function. You can use a method, but to make it work the way you want
you'll have to pass a value of the type into the method. So you may
as well use a function.
Ian
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