[xsd-users] Extracting

[Boris Kolpackov]

SHAH, Sima, FM <Sima.SHAH at rbos.com> writes:

> We don't have access to the auto_pointer.  The contents of the iterator
> return a reference.  Is there a way to get to the pointer?

Sure, just do &. Here is the code snippet:

for (...::iterator i = ...; ...; ++i)
{
  base* b (&*i);

  if (derived1* d1 = dynamic_cast<derived1*> (b))
  {
    // b is of derived1 type, adjusted pointer in in d1
  }
  else if (derived2* d2 = dynamic_cast<derived2*> (b))
  {
    // b is of derived2 type, adjusted pointer in in d2
  }

  ...

}


> P.S. Your new feature and factory mechanism idea is an excellent idea but
> we'd like to be able to do this for all classes not just subclasses.

I am not quite sure what you mean here. Can you elaborate a little bit?
The approach I described in the previous email allows one to specify
native base class for any type defined in XML Schema. Maybe you want
all types (including XML Schema built-in types such as string, token,
etc.) to derive from you base class?


hth,
-boris
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