RE: [boost] Re: Virtual inheritance in exception hierarchies

From: Alan.Griffiths_at_[hidden]
Date: 2003-09-04 07:28:29

> -----Original Message-----
> From: David Abrahams [mailto:dave_at_[hidden]]
> Sent: 04 September 2003 12:57
> 
> Alan.Griffiths_at_[hidden] writes:
> 
> > As already established, fundamentally the problem stems from broken
> > implementations
> 
> Who established that, and how?

You did.  Or have I jumped to a conclusion here?

It comes from a number of places - like the c.l.c++.m thread "Is internal
catch-clause rethrow standard?" and is repeated in your paper at:

   http://www.boost.org/more/error_handling.html

The relevent bit being:

"I reluctantly concede this point to Hillel Y. Sims, who beat it into me
(<wink>): until all OSes are "fixed", if every exception were derived from
std::exception and everyone substituted catch(std::exception&) for
catch(...), the world would be a better place."

Which AFAICS is the motivation for catching via a potentially ambiguous base
class reference in the first place.
-- 
Alan Griffiths
http://www.octopull.demon.co.uk/
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