[Issue 21143] vtbl not accessible without typeid

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21143

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at digitalmars.com

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
It's actually not a __trait, is a pseudo-member:

  class C { ... }
  void test(C c)
  {
    c.vptr // not the vtbl[] for C, but for the derived class that c is
  }

What I can do is make:

    C.vptr give a pointer to the vtbl for class C

I don't think your use actually needs to know the number of entries in it?

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