• Patrick Down <pat codemoon.com> Sep 04 2002
• Joe Battelle <Joe_member pathlink.com> Sep 05 2002
• Patrick Down <pat codemoon.com> Sep 06 2002
• Patrick Down <pat codemoon.com> Sep 07 2002
• Joe Battelle <Joe_member pathlink.com> Sep 07 2002
• "Walter" <walter digitalmars.com> Sep 12 2002

Patrick Down <pat codemoon.com> writes:

So I gather from the following message that
interfaces on a class are not inherited?

err.d(28): cannot implicitly convert Fred to Foo

interface Foo
{
  void doTheThing();
}

class Bar : Foo
{
  void doTheThing()
  {
    printf("one\n");
  }
}

class Fred : Bar
{
  void doTheThing()
  {
    printf("two\n");
  }
}

int main(char[][] args)
{
  Fred f = new Fred();
  
  Foo fi = f;
  
  fi.doTheThing();
  
  return 0;
}

Joe Battelle <Joe_member pathlink.com> writes:

So I gather from the following message that
interfaces on a class are not inherited?


earlier bug reports about this in the newsgroup.  I don't know when Walter plans
a fix.

Patrick Down <pat codemoon.com> writes:

Joe Battelle <Joe_member pathlink.com> wrote in
news:al70cj$1pn9$1 digitaldaemon.com: 

So I gather from the following message that
interfaces on a class are not inherited?


 See my earlier bug reports about this in the newsgroup.  I don't know
 when Walter plans a fix.


Yes, the following prints "One" which isn't right
any way you look at it.

interface Foo
{
  void doTheThing();
}


class Alpha : Foo
{
  void doTheThing()
  {
    printf("One\n");
  }
}


class Beta : Alpha, Foo
{
  void doTheThing()
  {
    printf("Two\n");
  }
}


void func(Foo theFoo)
{
  theFoo.doTheThing();
}


int main(char[][] argv)
{
  Beta b = new Beta();
  
  func(b);
  
  return 0;
}

Patrick Down <pat codemoon.com> writes:

Patrick Down <pat codemoon.com> wrote in 
news:Xns9281E2CE8BD23patcodemooncom 63.105.9.61:

 Yes, the following prints "One" which isn't right
 any way you look at it.


Disregaurd my post this seems to work.  There does
seem to be something odd about the way interfaces
are working but I haven't pinned it down yet.

Joe Battelle <Joe_member pathlink.com> writes:

Disregaurd my post this seems to work.  There does
seem to be something odd about the way interfaces
are working but I haven't pinned it down yet.


couple weeks ago.

"Walter" <walter digitalmars.com> writes:

"Joe Battelle" <Joe_member pathlink.com> wrote in message
news:al70cj$1pn9$1 digitaldaemon.com...
So I gather from the following message that
interfaces on a class are not inherited?




 earlier bug reports about this in the newsgroup.  I don't know when Walter


 a fix.


I haven't forgotten about it. I intend to focus on it after implementing
raii. It's not a trivial problem and I want to clear the table of
distractions <g>.

-Walter