D - Unsafe and doomed

[Walter Bright]

On 1/4/2014 11:41 AM, bearophile wrote:
> If you write an IDE in D language you wish to avoid this situation :-)

If you write an IDE in any language, you wish to avoid having bugs in it. I know 
that non-NULL was popularized by that billion dollar mistake article, but step 
back a moment.

Non-NULL is really only a particular case of having a type with a constrained 
set of values. It isn't all that special.