Why are interfaces so restrictive?

[Jarrett Billingsley]

"BCS" <BCS_member at pathlink.com> wrote in message 
news:dvfm45$1j5f$3 at digitaldaemon.com...
> why not let a struct implement an interface

Because that would complicate structs, something that I think Walter is not 
willing to do.

> or even let a function define an interface literal..

You could define an anonymous class literal which implemented that 
interface.

class Item
{

}

interface Database
{
 Item SearchForItem(char[]);
 bool AddItem(char[], Item);
 bool RemoveItem(char[]);
}

void DatabaseUI(Database deebs)
{

}


void Foo()
{
 DatabaseUI(new class Database
 {
  Item[char[]] bar;

  Item SearchForItem(char[] n)
  {
   if(n in bar)
    return bar[n];
   throw new Error("blah!");

  }

  bool AddItem(char[] n, Item i)
  {
   if(n in bar)
    throw new Error("blah!");

   bar[n] = i;
   return true;
  }

  bool RemoveItem(char[] n)
  {
   if(n in bar)
   {
    bar.remove(n);
    return true;
   }

   throw new Error("blah!");
  }
 });
}

void main()
{

}