Spec#, nullables and more

[bearophile]

David Gileadi:

> Later I decided that this might not have as much value as I thought, 
> since many of the snippets depended on command-line arguments and I 
> didn't see a way to provide them.

ideone allows you to give command line arguments/input too to D programs (but you can't change compilation switches yet, I have suggested that too to the ideone authors).

Bye,
bearophile