🚀 go-pugleaf

>>>>> mfinney  <mfinney@inmind.com> writes:

> In <n1401567773.54923@taligent.com>, "Bill Gibbons" <bill_gibbons@taligent.com> writes:
>> The proposed extended_type_info is given below.

> This "extended" RTTI is a good start, but it is still missing
> something crucial to many programs.  That is the ability
> to ask if object x is the same class or a subclass of a
> type or another object.

Hmm?  What about

if (Derived *p = dynamic_cast<Derived*>(possible_derived))
  {
     do_something_special (p);
  }

Does this not ask whether possible_derived is a pointer to either a
Derived or a subclass of Derived?  It doesn't look like 'isa', but it's
just as powerful.  See D&E for the rationale behind choosing this syntax.

Jason

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