interface is interface

[Steven Schveighoffer via Digitalmars-d-learn]

On Tue, 17 Jun 2014 15:02:33 -0400, Pavel <phondogo at gmail.com> wrote:

> Hello!
>
> import std.stdio;
>
> interface I {
> 	
> }
>
> interface B : I {
> 	void test();
> }
>
> interface C : I {
> 	void test1();
> }
>
> class A : B, C {
>    override void test() {}
>    override void test1() {}
> }
>
> void main() {
> 	A a = new A();
> 	I b = cast(B)a;
> 	I c = cast(C)a;
>
> writeln(cast(void*)a, "  ", cast(void*)b, "  ", cast(void*)c); //  
> 1EE1FE0  1EE1FE8  1EE1FEC

b and c should be identical IMO. This means there are 2 entries for I  
inside the object, which is a waste of space.

>
> assert (a is b); // OK

This should also fail. It seems like a bug to me. 'is' should compare  
pointers, not anything else.

-Steve