Re: Preminary submission: format3

From: rogeeff (rogeeff_at_[hidden])
Date: 2002-02-11 13:01:51

--- In boost_at_y..., Karl Nelson <kenelson_at_e...> wrote:
> > From: "Karl Nelson" <kenelson_at_e...>
> > > Second, what is reasonable here?  Under Microsoft .Net they 
allow the
> > > same argument to be used multiple times.  Or an argument not to 
be
> > > used.   Should this be valid?
> > > 
> > >    cout << format("%2$d %2$x", i, i);
> > 
> > Why not?
> 
> It drives down preformance because you must now scan the format
> strings list to find out all the places the string is used and 
> do the conversions.  Also it breaks 1-1 correspondence with the
> arguments.  But then if it is needed that it should have it.  
> Does it need it?
> 
> --Karl

On one hand if it really hurt a performance I would prefer in some 
cases not to support this. OTOH it could be convinient. Could you 
postpone this decision into a policy?

Gennadiy.