Function is not implemented.

[Agustin]

On Tuesday, 26 November 2013 at 17:50:12 UTC, Ali Çehreli wrote:
> On 11/26/2013 09:32 AM, Agustin wrote:
>> I'm trying to move from Java to D, and i have some like this:
>>
>> interface A
>> {
>>   public bool isCancelled();
>>   public void setCancelled(bool value);
>> }
>>
>> class B
>> {
>>   public bool isCancelled();
>>   protected void setCancelled(bool value);
>> }
>>
>> But when i do
>>
>> class C : B, A
>> {}
>>
>> I get
>>
>> Engine/Main.d(6): Error: class Main.C interface function 'bool
>> isCancelled()' is not implemented
>> Engine/Main.d(6): Error: class Main.C interface function 'void
>> setCancelled(bool value)' is not implemented
>
> You have to provide the implementations of the interface 
> functions either in B or C. I think you actually tested with B 
> implementations though:
>
> class B
> {
>     public bool isCancelled()
>     {
>         // implemented
>         return false;
>     }
>
>     protected void setCancelled(bool value)
>     {
>         // implemented
>     }
> }
>
> Still the same error...
>
> Unless you want to implement the functions on C as well, then C 
> should not inherit from A. A is already inherited by B:
>
> class C : B    // <-- no A
> {}
>
> Ali

Oh i forgot to add the implementation here, but its there, what i 
want to do is with an interface be able to change "protected" to 
"public", this is possible using Java but i don't know if 
possible using D.


class C : B, A -> setCancelled() is changed from protected to 
public
{
}