Re: [boost] Geometry/Vector Lib

22 Sep 2006


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-----Original Message-----
From: boost-bounces@lists.boost.org 
[mailto:boost-bounces@lists.boost.org] On Behalf Of Martin Bonner
Sent: Friday, September 22, 2006 6:52 AM
To: boost@lists.boost.org
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