Warning

[Georg Wrede]

Derek Parnell wrote:

> Sorry, but I forgot something nice. Anonymous structs don't seem to be
> solving any problem that I've come across, but anonymous unions are very
> nice.
>  
>  struct S
>  {
>    int type;
>    union { 
>       int i; 
>       long l;
>       short s;
>       real r;
>       float f;
>       Foo foo;
>    }
>  }

Of course you know, and all regulars here know, but the casual reader 
has to be warned here.

NEVER MIX VALUE AND REFERENCE types in a union!

While technically it poses no problem, in real life you'll end up 
shooting yourself in the foot -- faster than it takes to say 'Ouch!'

And if you don't, the later maintainer of your code *will* shoot you.