I'm having trouble getting the full name of an object of a class that implements an interface, using typeid() or .classinfo, the behavior seems to be different from that of a class that simply derives other classes.

interface FooInterface {}
class BarImplementsInterface : FooInterface {}

class FooBaseClass {}
class BarDerivedClass : FooBaseClass {}

void main() {
	FooInterface a = new BarImplementsInterface();
	FooBaseClass b = new BarDerivedClass();
	writefln("a class: %s", a.classinfo.name);
	writefln("b class: %s", b.classinfo.name);
}

Output:
a class: test.FooInterface
b class: test.BarDerivedClass


I expected "a class: test.BarImplementsInterface" as the result output.. Am I expecting the wrong behavior?  Is there a preferred way to do this?

Cast it to Object:
	FooInterface a = new BarImplementsInterface();
	FooBaseClass b = new BarDerivedClass();
	Object o = cast(Object)a;
	writefln("a class: %s", a.classinfo.name);
	writefln("b class: %s", b.classinfo.name);
	writefln("o class: %s", o.classinfo.name);

yep, cast it. without the cast, compiler assuming that it knows the type in runtime, and is using well-known classinfo address instead of really looking into instance for that.

On 7/25/16 5:54 AM, Kagamin wrote:
> Cast it to Object:
>     FooInterface a = new BarImplementsInterface();
>     FooBaseClass b = new BarDerivedClass();
>     Object o = cast(Object)a;
>     writefln("a class: %s", a.classinfo.name);
>     writefln("b class: %s", b.classinfo.name);
>     writefln("o class: %s", o.classinfo.name);

Yes, for the unrelated reason that COM objects may not be D objects, interfaces that can only possibly be D Objects don't implicitly cast to Object.

-Steve

Ahh I see, thanks guys.