Null references redux

[bearophile]

Andrei Alexandrescu:

> One good thing about nullable references 
> is that they are dynamically checked for validity at virtually zero 
> cost. Non-nullable references, therefore, would not add value in that 
> respect, but would add value by reducing the cases when programmers 
> forgot to initialize references properly.

nonnullable references can also reduce the total amount of code a little, because you don't need to write the null tests often (the points where you use objects are more than the points where you instantiate them).

Bye,
bearophile