POD

[Andrei Alexandrescu]

On 12/28/12 10:12 PM, Walter Bright wrote:
> For example, C++ disallows mixed public/private data in a POD. I've
> never understood the reason for that restriction other than "C doesn't
> have private fields". D doesn't propagate that aspect.

The idea was to leave C++ compilers to change the order of fields in 
classes with private data for optimal layout. I don't know of any 
compilers that do, but that was the intent. PODs were not susceptible to 
such layout optimization because they had to be compatbile with C's layout.

Andrei