Keeping binary compatibility

Thiago Macieira thiago at kde.org
Tue Oct 5 07:55:51 BST 2010


On Tuesday 5. October 2010 03.20.52 Michael Pyne wrote:
> On Monday, October 04, 2010 17:55:30 Lubos Lunak wrote:
> > On Monday 04 of October 2010, George Kiagiadakis wrote:
> > > I think source compatibility is easier to maintain because it is more
> > > obvious when you break it and people generally understand it better
> > > than binary compatibility. I don't think we have a problem keeping
> > > source compatibility atm, do we?
> >  
> >  We occassionally do (I e.g. remember fixing a bug somewhen in the past
> >  that
> > 
> > had been introduced by broken source compatibility and people thinking 0
> > is a null pointer).
> 
> Are you referring to 0 in C, or in C++? I ask only because 0 really *is*
> the C++ null pointer (or at least, the only way of convincing the C++
> compiler to use whatever the actual null pointer is), at least until
> C++0x's nullptr addition gets better supported.

0 is the C++ null pointer, but that doesn't mean it's a bitwise zero stored in 
the variable.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
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