Re: Minutes of ESC call

On 03/22/2013 06:41 PM, Michael Stahl wrote:
> On 22/03/13 18:25, Stephan Bergmann wrote:
> > On 03/21/2013 05:28 PM, Jan Holesovsky wrote:
> > > * Kill include guards in .hxx, and use #pragma once instead
> > >           + makes the headers nicer
> > >           + the benchmark available on the net seems to suggest it speeds
> > >             up MSVC
> > >           + Lubos' test seems to suggest that there is ~no difference for
> > >             gcc
> > >         + consensus: let's just do it after 4.0.2 is out
> >
> > The only drawback I can find is that #pragma once is non-standard and
> > therefore
> > <http://gcc.gnu.org/onlinedocs/gcc-4.7.2/cpp/Alternatives-to-Wrapper-_0023ifndef.html#Alternatives-to-Wrapper-_0023ifndef>---arguably
> > rightly so---recommends against its use.
>
> hmm... does that really matter?

Hopefully not.  But if the claimed MSVC speedup was non-existent, it 
would be humble to go with the (not completely inadequate, after all) 
standard means and avoid one potential pitfall.  (/Every/ deviation from 
the standard, however minuscule, is bound to bite us one day down the 
road.)  Or maybe not.  Anyway, I should probably have inserted "very 
minor" before "drawback," or even kept away from the keyboard entirely... ;)

Stephan