How does D improve design practices over C++?

[bearophile]

Walter Bright:
> "Safety" in programming languages does not refer to program correctness, 
> but absence of bugs that could result in memory corruption. The agenda 
> of SafeD is to find the subset of D that can guarantee there is no 
> memory corruption.

Yes, you are right, I have mixed two different things. They are almost orthogonal.
The final purpose of a good language is to allow to write in a short enough time programs that give the correct output.
But the things I was referring to are helpers to avoid putting bugs into the code, while SafeD is a way to not have really bad memory consequences if a certain class of errors are present anyway in the code :-)

Bye,
bearophile