Xref: utzoo gnu.g++.help:498 comp.lang.c++:11831
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From: tilo@nmr.lpc.ethz.ch (Tilo Levante)
Newsgroups: gnu.g++.help,comp.lang.c++
Subject: compare types
Message-ID: <9102140811.AA16812@purcell.ethz.ch>
Date: 14 Feb 91 08:11:46 GMT
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Organization: Gatewayed from the GNU Project mailing list help-g++@prep.ai.mit.edu
Lines: 28

assume the following classes:

class base;
class d1: public base;
class d2: public base;

base *v1;
d1 *v2;
v1 = new d1;

Is there a way to decide during runtime, wether
v1 points to a variable of type d1 or of type d2.

Or is there a way to decide wether 
  v2 = (d1*) v1;
is valid.

Thanks for any help.

Tilo 

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