Re: 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
{
}