testcase.d

testcase.d.d

module testcase;

import std.stdio;

interface I1 { }
interface I2 : I1 { }

class C1 : I2 {
  void foo() {
    writefln("These should REALLY not be the same:");
    writefln(": %s", cast(void*) cast(I2) cast(I1) this);
    writefln(": %s", cast(void*) cast(I2) this);
    writefln("for comparison");
    Object obj = cast(Object) this;
    writefln(": %s", cast(void*) cast(I2) cast(I1) obj);
    writefln(": %s", cast(void*) cast(I2) obj);
  }
}
class C2 : C1, I2 { }

void main() {
  (new C2).foo();
}

Agh, of course meant to say "not be different".