just an idea (!! operator)

[Christophe Travert]

"Roman D. Boiko" , dans le message (digitalmars.D:172259), a écrit :
> On Friday, 13 July 2012 at 13:46:10 UTC, David Nadlinger wrote:
>> I guess that this operator is only really worth it in languages
>> where every type is nullable, though.
>>
>> David
> 
> It might mean identity (return the argument unchanged) for value 
> types.

It might mean: give me the default I provide as an extra argument:

Example:
car?.driver?.name ?: "anonymous";

rewrites:
car? car.driver? car.driver.name? car.driver.name? car.driver.name
                                                 :anonymous
                                :anonymous
               :anonymous
   :anonymous