🚀 go-pugleaf

Stephan wrote:

> I'm a beginner at C++, and am in the process of teaching myself
> how to approach a problem using the concepts of OOP. Part of this
> is learning how to tackle a problem in a manner consistent with the
> solution techniques available. It isn't always possible, and sometimes
> it requires approaching the problem in a different manner.

Well, Multiple Inheritance is a standard feature of the C++ language,
and some libraries are designed around its use (as 'mixin' classes)  If
BCB is a C++ compiler you would expect this feature.

VCL is implemented in Delphi, which rejected the idea of multiple
inheritance as something too prone to abuse.  Therefore VCL classes are
limited to single inheritence with TObject at the root.  However, it has
long been observed that sharing interfaces is a valuable feature of OO,
as exemplified in Java.  Therefore around Delphi 3/4 it gained the
ability to implement multiple interfaces so long as only one 'concrete'
class descends from TObject.  This feature has taken a long time to
migrate to C++.

We are left with a compiler for a language that supports MI, a class
library implemented in a language that supports multiple interfaces, yet
until last version we were unable to use it, and even now it is somewhat
limited.  I think it was a fair question to ask <g>

-- 
AlisdairM
Team Thai Kingdom