virtual inheritance bug

[Jorge Monteiro]

Hi,


I want to report a bug in egcs (egcs-2.91.54, but it's there since the first
time I tried egcs in version 1.0).

The bug is the following, if we have virtual inheritance after normal
inheritance egcs gets confused and doesn't let us access protected/private
methods of the base (non-virtual inheritance).

Here is a code sample:

ass ORB_proxy
{
  protected:   
  int i;
    virtual int destruct() { return 0; }
};
class Persistent_proxy: public ORB_proxy
{
protected:
    virtual int destruct() { return 1; }
};
class CorporateBUG_proxy : virtual public Persistent_proxy
{
    CorporateBUG_proxy()
	{
	ORB_proxy::i = 0;
	    ORB_proxy::destruct(); // Error????
	}
};
class CorporateOK_proxy : public Persistent_proxy
{
    CorporateOK_proxy()
	{
	ORB_proxy::i = 0;
	    ORB_proxy::destruct();
	}
};


Compiling with egcs produces the following:

[bash]ganymedes{jomo}521: g++ virtual_inheritance_bug.cpp
virtual_inheritance_bug.cpp: In method
`CorporateBUG_proxy::CorporateBUG_proxy()':
virtual_inheritance_bug.cpp:5: `int ORB_proxy::destruct()' is protected
virtual_inheritance_bug.cpp:17: within this context
[bash]ganymedes{jomo}522:

NOTE: If we change Persistent_proxy to inherit virtually everything goes ok.


Is there any plans to fix this?


Thanks,

Jorge Monteiro                      mailto:jomo@cayennesoft.nl
Senior Software Engineer            http://www.cayennesoft.com
Cayenne Software, Inc., Delft, The NetherLands