Re: [PATCH kvm-unit-tests 2/4] Introduce a C++ wrapper for the kvm APIs

Gleb Natapov
2010-11-24T17:36:50Z

On Wed, Nov 24, 2010 at 07:25:08PM +0200, Avi Kivity wrote:
> On 11/24/2010 07:17 PM, Jes Sorensen wrote:
> >>
> >> Anyone wishing to implement this interface is forced to implement read
> >> and write methods (callbacks) with exactly the right signature. The
> >> compiler will complain if they don't. So if File is a good interface,
> >> we can make the compiler force people to use it correctly.
> >>
> >> We can emulate this in C with ->ops-> things, but that's just
> >> boilerplate and more places for people to get things wrong, or lazy and
> >> take shortcuts.
> >
> >In the mean time we spend our time debugging the runtime because the
> >virtual functions don't behave as expected. In C we know what is going
> >on, in C++ it is pray and hope.
>
> That is pure bullshit. All major browsers are written in C++, all
> major office suites, one leading free desktop, google, countless
> other projects. There is a lot more C++ code in the world than C
> code. If virtual functions didn't behave as expected, surely we'd
> hear by now.
>
Google don't use exceptions though :) They claim it is hard to integrate
with legacy code if exceptions are used. Our case BTW.

--
Gleb.