[Issue 1712] vtbl[0] for interface not set to corresponding Interface*

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1712


dhasenan at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |




------- Comment #2 from dhasenan at gmail.com  2008-01-20 10:53 -------
So you're saying that the Interface* should appear in the vtbl of each
implementing class? Like this:

---
interface IFoo {}
class Foo : IFoo {}

// Foo implements one more interface than Object, so its vtbl includes
// one Interface* that Object doesn't. Nothing else is specific to Foo.
assert(Object.classinfo.vtbl.length + 1 == Foo.classinfo.vtbl.length);
---

Except that doesn't work.

I understand that the vtbl of an interface should not include any function
pointers. However, the spec says it should hold an Interface*.
http://www.digitalmars.com/d/phobos/object.html if you want the link. Either
the spec is incorrect or the implementation is incorrect. If the spec is
incorrect, then I cannot proxy certain objects, and you should alter the
documentation.

Or is there some other vtbl in which the Interface* should appear? If so, the
documentation is far from clear on the matter and should be altered.


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