Re: [boost] Geometry/Vector Lib

From: Sohail Somani (s.somani_at_[hidden])
Date: 2006-09-22 15:50:46

> -----Original Message-----
> From: boost-bounces_at_[hidden] 
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Martin Bonner
> Sent: Friday, September 22, 2006 6:52 AM
> To: boost_at_[hidden]
> Subject: Re: [boost] Geometry/Vector Lib
> 
> ----Original Message----
> From: Sohail Somani 
> 
> > 
> > Marcus Lindblom wrote:
> >> I've sometimes done just:
> >> 
> >>    class vector3d
> >>    {
> >>    public:
> >>       float x, y, z;
> >> 
> >>       float operator[]( int index ) const
> >>       { return (&x)[index]; }
> >> 
> >>       /* ... */
> >>    };
> > Won't that not work in the presence of padding? 
> In theory, yes.  In practice, I can't see why any compiler 
> would bother
> adding such padding.  

Theory is what holds the C++ world together! I wouldn't want to
knowingly invoke UB unless I can prove its worth my while (for example,
in the case of hardware specific optimizations).

Sohail