[Issue 14612] typeid(interface) returns TypeInfo_Class object

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14612

--- Comment #8 from Rainer Schuetze <r.sagitario at gmx.de> ---
> Actually _d_interface_cast is not so high cost so Object has no 
> base class and implements no interfaces.

It's still a lot more than just a null check and reading a vtbl entry an
another indirection.
If the instance is from a deeply derived class, _d_interface_cast walks through
all base classes to find Object.

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